HD and SAWC Bearing Manuals

5/20/2018 HD and SAWC Bearing Manuals

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Prepared by:

Phil Marino


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HOWDEN BUFFALO ON REBABBITING

Howden Buffalo, Inc does not rebabbit liners nor do we recommend that liners b

rebabbited.

The Sturtevant (Howden Buffalo) bearings are babbited by a process of a Kolen

electrolytic cleaning system to assure babbit adhesion, acid pickling, hand tinninunique patented centrifugal babbiting process to insure uniform density. This yie

high quality sleeve with a minimum 85% babbit contact by ultrasonic test, but ty98-99%, with no porosity or other defects.

A typical re-babitter will skip most of these steps, especially the centrifugal cast

will end up with possibly as little as 15-25% contact by ultrasound, plus other de

such as porosity, wrong type of babbit, eccentricity due to improper fixturing, wsize, taper or tilted bore, elliptical versus cylindrical bore confusion, wrong or n

pockets, wrong or no oil passages, wrong length, no reconditioning of the spheri

etc. In other words the re-babbited sleeve will likely have one or more of these dand will simply be far from OEM quality. Howden Buffalo itself does not re-bab

sleeves due to the difficulty of reconditioning the sleeve casting; especially the s

seat area, even though Howden Buffalo offers a discount of 25% off the price of

sleeve for the return of a repairable sleeve. The details of the bearing sleeve excprogram are located on page 6 of section 4.03 of the Parts and Service price boo

Please feel free to call or e-mail me if you require any additional information. Th

Regards,

Phil Marino


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June 16, 2006

To: All Sales Representatives

Subject: Sturtevant Bearing Domestic Manufacturing

Over the last 8 months we have been transferring the manufacture of our WestSturtevant HD and SAWC bearing line from a European supply to a supply stat

We are now manufacturing all parts in the US. This move was driven by a desirimprove our lead times on parts, eliminate the additional shipping and duty cost

associated with overseas shipments, and ultimately to better serve our custome

The availability of material and the US regulations associated with pouring leadnecessary for us to change our standard babbitt material from a lead based recbased one. For all our fan applications a tin based babbitt is a suitable replacemlead based babbitt. This switch will not create any performance issues and will the price for our sleeves.

Please take note that our price list has been revised changing the sleeve part nfrom the lead based part number to the new tin based part number. For the HDthe sleeve part number changes from a G006 part number to a G003 part numthe SAWC bearing, the sleeve part number changes from a G004 part numbeG005 part number.

We still have some lead based sleeves in inventory. Please note that this invensupplied until its exhausted. To help insure that the correct part numbers appeacustomers paperwork and on our paperwork please check for inventory throug

Horrigan when an order is eminent to see what part number will be supplied. Wthat the lead inventory should be depleted by the end of 2006.

Please keep a copy of this letter with your price list.

Thank you for your continued support.


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STURTEVANT SAWC BEARING

Bearing description

The Sturtevant Self Aligning Water Cooled sleeve bearings are available in six sizes ranging fro

to 8. The bearings are a split self-aligning design and although more commonly cooled with wa

been supplied as air and as oil cooled. The babbitted sleeves are bored slightly elliptical to proviwedging action of the oil between the shaft and the journal. This design insures a flow of oil ove

length of the bearing surface, with the excess oil being forced to lubricate the thrust faces before

to the bearing sump.

For normal applications, ring oiling may be used with all sizes up to 1200 rpm and up t

diameter at 1800 rpm, dependent on radial and thrust loading. Each bearing comes withbrass oil rings. Friction with the shaft causes the rings to rotate, carrying a supply of oi

sump to the shaft in the support area. With higher loads and rpms supplemental oil marequired from an external oil lubrication system.

Both the upper and lower halves of the bearing sleeves are provided with cored passage

cooling medium. Inlet and outlet pipes for each half, pass through the bearing cap (top housing), for access. Also on top of the bearing housing, directly above the oil rings are

inspection ports with removable caps. This allows frequent checks to verify that the rin

moving.

When the SAWC bearing is to be used with a circulating oil system, special supply nozlocated in the inspection ports in such a manner that the rings can still be observed. In a

two drilled and tapped openings are provided in the bearing body for connection of oil

The bottom of the openings maintains a minimum oil level above the oil rings to give sprotection. Drawing 247C101details a typical bearing arrangement of this type. Refer t

Application Data 1301 page 13 for a piping schematic of circulation piping for an SAW

bearing. Additional information pertaining to the piping schematic and bearing connecarrangement for flood lubrication (circulating oil system) is detailed on drawing 683B5

A less common method which was used to provide oil circulation cooling to SAWC be

involved feeding the oil through the jackets in the sleeve. A specially machined sleeve

supplied which included drilled holes and pathways through the jackets and Babbitt, wallowed the oil to travel from the jacket and onto the shaft journal surface. The details o

arrangement are some on drawings 695C897 and 499D266.

Refer to the Howden Instruction Book under section 6.2 for installation, cooling arrangement da

and maintenance of these bearings.


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Thrust Collars

Two thrust collars are required on the fixed bearing end. Thrust collar is not required for floatin

except as the bearing seal used requires.. The collars are non-split and are mounted with a shrinkthrust collars are installed in the factory they are finished machined on the shaft perpendicular anField replacement collars in the Howden Buffalo Parts and Service price book are machined com

Two basic types exist:

Original type Consists of bearing end cap (to be used w/ interlocking thrust collar)

auxiliary dust seal rings.

New type Cork Seal w/ Cork Seal retainer

Seal Applications

The following seals are offered on SAWC bearings:

Original Seal type All sizes

- Split design consists of a holding ring, two seal rings (garlock) and a spacer ring

-

Seal bolts onto the bearing end cap to provide additional sealing to interlocking thr

collar/end cap seal- Most common seal for SAWC bearing

- All parts stocked in Dearborn

New Seal type (post 1969) All sizes

- Also listed as standard seal

-

Consists of a single split cork seal and garter spring, with an end cap gasket and se(housing)

- Used without the bearing end cap

- Can be used with either thrust collar type- Can be supplied as a double cork seal assembly (listed as standard seal w/ auxiliary

- Cork seals and garter springs are stocked in Dearborn, the retainers typically are no

- Provides a better seal than original type


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CAUTION

WARNING

Refer to applicable Contract/Mai

Bearing Drawings for identification

parts.

NOTE

Certain Bearing parts which are mac

and split for installation, are match-mcorrect reassembly. The match-marks

both halves of the parts. Parts are m

and are stamped in numerical sequen

the Bearing do not have the same

Housing may be stamped 18 and the

NOTE

The following installation instructions

of rubber sealing compound similar

Form-A-Gasket #2 on the interna

Housing Split and Seals. It is recomme

NOT be applied until final pre star

performed.

Section 6.2 Self-Aligning Water Cooled (SAWC)Sleeve Bearings

GENERAL

This Bearing is normally supplied with water cooling.

It may also be supplied for air cooling or with no external

cooling depending on application.

Bearings are shipped complete with all internal parts

packed inside Bearing Housing. Bearings which haveAuxiliary Dust Seals are shipped with seals mounted in

place. End Cover Plates are factory installed and should not

be removed until the Bearings are to be installed to prevent

contamination and/or loss of internal parts.

External accessories such as thermocouples, vibration

detectors, Pedestal Bearing holddown bolts, nuts, washers

and flood lubrications accessories, if applicable, are

shipped separately.

Photographs are shown adjacent to text, and depict the

preferred methods of installation under ideal conditions.

Actual field assembly and installation will be more

intricate, therefore, strict attention to all Warnings, Cautions

and Notes is required.

PREPARATION FOR INSTALLATION

1. Bearing as received with shipping End Plates in place and all internal

parts packed inside. Lift Bearing using two (2) eye bolts. (See Photo 1)

NOTE

Bearing Housing bottom has machined surface. Place

Bearing on clean, dry non-abrasive surface.

owdHPowere


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Photo 2

Photo 3

2. Remove bolts securing End Cover Plates and Seal Assembly(s) (when

furnished). Retain Seal Assemblies and gasket for later use during

reassembly. Retain heavy End Plate for use on outboard end of floatingBearing, unless Fan Shaft is to extend through Bearing Housing (See

Contract/Main Assembly Drawing for details). (See Photo 2.)

3. Loosen Allen set screws on four (4) Cooling Pipe Seal Collars. (SeePhoto 3.)

4. Raise Cooling Pipe Seal Collar 1/2 inch and tighten Allen set screw.

Raise Rubber Seal to bottom of Collar. (See Photo 4.)


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Photo 5

Photo 6

5. Remove four (4) Cooling Pipes. (See Photo 5.)

6. Remove four (4) small Bearing Housing flange bolts, lock washers and

nuts. (See Photo 6.)

NOTE

The two (2) center pipes adjacent to Jack Bolt are longer

than the End Pipes.

7. Remove two (2) large Bearing Housing bolts, lock washers and nuts.

(See Photo 7.)

NOTE


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Photo 8

Photo 9

8. Remove two (2) Oil Filler / Inspection Caps. (See Photo 8.)

9. Loosen Jack Bolt Locking Nut. Remove Jack Bolt. (See Photo 9.)

NOTE

On 7-inch and 8-inch Bearings, there are two (2) additional

Jack Bolts located in bottom half of Housing. They should

be removed at this time if installed.

10. Tapping out from the bottom, remove two (2) tapered dowel pins from

Housing flange. (See Photo 10.)


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Photo 11

Photo 12

11. Using two (2) eye bolts provided, lift top half of Bearing Housing

Assembly. (See Photo 11.)

12. Remove Housing Flange Gasket from between Bearing Housing

halves. (See Photo 12.)

NOTE

Bearing Housing halves are machined as a unit and MUST

be reassembled with their mating halves. Check and confirm

match-marks on one of the machined ends of both halves.

13. Remove Spherical Washer from top of Bearing Sleeve. (See Photo

13.)

NOTE


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Photo 14

Photo 15

14. Remove all internal components, except Sleeve Assembly, from

inside the bottom of Bearing Housing half. Store all parts in a clean, dry

environment for later use when reassembling. (See Photo 14.)

15. Remove two (2) eye bolts from upper half of Bearing Housing and

screw into threaded holes located in top half of Bearing Sleeve. Lift

Sleeve from lower half of Bearing Housing. (See Photo 15.)

NOTE

Rust preventative MUST be removed from all Bearing

parts, including machined bottom surface of lower Bearing

Housing, top half of Bearing Pedestal, Shaft Journal and

Thrust Collar areas. Factory applied rust preventative can

be removed with mineral spirits, kerosene or other solvent.

SLEEVE ASSEMBLY HAS CRITICAL MACHINED

INTERNAL AND EXTERNAL SURFACES. EXERCISE

CARE IN HANDLING AND STORAGE TO PROTECT

SURFACES. BEARING SLEEVE ASSEMBLY MUST BE

PLACED ON A SOFT, CLEAN SURFACE SUCH ASWOOD.

CAUTION

RUST PREVENTATIVE COMPOUNDS AND THEIR

THINNERS CAN BE FLAMMABLE AND/OR TOXIC ALL

WARNING


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16. Inspect machined bottom of lower Bearing Housing for flatness with

a straight edge. Any high spots around nicks or gouges must be removed

to permit full contact with shims. Install lower half of Bearing Housingon top of Bearing Pedestal. (See Figure 6.2-1.) Bearing Housing must be

installed with larger tapped holes at bottom of Housing, outboard (away

from fan).

Prior to aligning unit, it is essential that two (2) full width shims of

approximately 1/16 inch total thickness be placed between base of

Bearing Housing and top of supports. These shims should be slotted as

shown in Figure 6.2-1.

17. Bolt lower Bearing Housing to Pedestal, secure with bolts, hardened

steel flat washers, and nuts provided. Nuts are to be only finger-tight at

this time to allow for adjustment.

NOTE

Shims should be made in two (2) parts and slotted to clear

the Bearing bolts, thus allowing easy installation or

removal. The shims should be solid and extend across the

top of the Bearing Pedestals.

These shims are not for alignment of the Fan Rotor to

Driver. They are used to level the Rotor, end-to-end, and to

allow for any variation in Bearing Housing height if a

replacement should be necessary.

Should it become necessary to replace the Bearings, these

shims will help and may be used to preserve the alignment

of Bearings, Shaft, and Coupling, if the foundation changes

slightly in elevation from end-to-end.

18. Tap out and remove two (2) locating dowel pins in Sleeve. Dowels are

straight shank. (See Photo 16.)

Figure 6.2-1Installing Lower B

Half on Pedestal


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Photo 17

19. Remove four (4) Socket Head Cap Screws securing upper and lower

Sleeve halves together. (See Photo 17.)

20. Lift upper Sleeve half, using eye bolts and place on wood.

NOTE

Bearing Sleeve halves are machined as a single unit and

must be installed or replaced together. A match-mark

number is stamped on one end of each half.

21. The fixed end of the Shaft with two (2) Thrust Collars is shown. Clean

Shaft Journal and Thrust Collars thoroughly, using solvents (see

WARNING, and NOTE following Step 15). It is critical that the Journal

areas and Thrust surfaces be clean and completely free of all foreign

matter, nicks, burrs, rust, etc. (See Photo 18.)

SET SLEEVES WITH THE HORIZONTAL SPLIT LEVEL

TO PREVENT TOP HALF FROM SLIDING WHEN CAP

SCREWS ARE REMOVED. PERSONNEL INJURY OR

EQUIPMENT DAMAGE COULD RESULT FROM SLEEVE

SLIDING.

WARNING


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INSTALLATION

NOTE

Before installing Sleeves on Shafts, other non-split

components to be installed with Rotor (Vane and Inlet

Assemblies, Pressurized Shaft Seals, etc.) should be placed

on Rotor and securely fastened in their lifting position.

These components, Vane and Inlet Assemblies, Pressurized

Shaft Seals, may have an inner diameter sufficient to clear

the outer diameter of Sleeve. However, it is safer to install

these items first. Refer to Section 5.7 Rotor Installation.

NOTE

Historically, bearings with Thrust Grooves on babbitted

Thrust Faces indicated that the Bearing Sleeve must be

installed on the fixed Bearing End of Rotor. Grooves were

normally furnished on one Sleeve per Fan only. Today, only

grooved sleeves are supplied and can be used on either

fixed or floating ends.

NOTE

During reassembly, torque all fastenings to values listed in

Section 5.10.

NOTE

The following instructions call for the use of fluid rubber

gasket or Sealing Compound (similar to PERMATEX Form-

A-Gasket #2 or equal) on Internal Pipe Threads, Housing

Split Joints, and Auxiliary Seals. It is recommended thatthese NOT be applied until final pre start-up service is

performed to ease disassembly for inspection.

When fluid rubber gasket or sealing compound is used, it

must be a thin film only. Excess quantities will squeeze out

of joints when bolts are torqued, and may cause serious

damage to Bearings or accessories.

22. Identify location of match-marks in Step 20. Raise lower Sleeve Half

to Shaft Journal with extreme care, preventing damage to machined

surfaces. (See Photo 19.)

Be sure Bearing Sleeve will be oriented correctly with regard to


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Photo 20

Photo 21

23. Disassemble Oil Rings. (See Photo 20.)

24. Reassemble Oil Rings around Shaft and lower half of Bearing Sleeve.

(See Photo 21.)

25. While supporting lower Sleeve Half, carefully place upper Sleeve

Half into position. (See Photo 22.)


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Photo 23

Photo 24

26. Install four (4) Socket Head Cap Screws to assist in alignment. Do not

tighten. (See Photo 23.)

27. Install two (2) locating dowel pins removed in Step 19. (See Photo

24.)

28. Tighten four (4) Socket Head Cap Screws securing upper and lower

Sleeve halves. (See Photo 25.)


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Photo 26

Photo 27

29. Check the axial clearance between Sleeve Thrust Faces and Thrust

Collars (see Contract/Main Assembly Drawing for dimensions and

tolerances). (See Photo 26.)

30. The Rotor is now ready for installation. At this point, any Inlets, Vane

and Inlet Assemblies, and non-split Shaft Seals must be positioned and

braced on the Rotor before installing same. (See Section 5.7 for the Rotor

installation instructions and note after Step 21.) (See Photo 27)

IF A DISCREPANCY IS FOUND, DO NOT ATTEMPT TO

MOVE THRUST COLLARS OR SCRAPE BEARINGS.

(CONTACT YOUR HBI REPRESENTATIVE.)

CAUTION

MOVEMENT OF FLOATING BEARING MUST BE

RESTRICTED WHILE HANDLING ROTOR. TIE OR TAPE

SLEEVE TO SECURE.

WARNING

IF BEARING ASSEMBLY IS NOT TO BE COMPLETED

AFTER ROTOR IS SET, INSTALL THE UPPER HALVES

OF THE HOUSINGS TO PROTECT THE BEARING

CRITICAL PARTS WHILE COMPLETING OTHER

ERECTION, ASSEMBLY, AND ALIGNMENT

PROCEDURES. BEARINGS SHOULD ALSO BE

COVERED WITH A WATER-REPELLENT MATERIAL

UNTIL THEY ARE COMPLETELY INSTALLED, OILED,AND ALL SEALS ARE IN PLACE.

DEPENDING ON JOB SITE CONDITIONS, THE

JOURNALS AND THRUST COLLARS MAY REQUIRE

A COAT OF OIL OR OTHER RUST PREVENTATIVE.

THESE COATINGS HOWEVER WILL CATCH AND

CAUTION


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Photo 28

Photo 29

31. Complete leveling of Rotor per Rotor Leveling and Alignment

instructions in Section 5.7. See Contract/Main Assembly Drawing for

Bearing clearance limits applicable to specific Fan.

Check clearance between outboard (floating) Bearing Sleeve and

Thrust Collar, if applicable, and adjust if required, by moving Bearing

Housing on Pedestal. (Photo shows inboard or fixed Bearing.) (See Photo

28.)

32. Remove End Cover Plates and disassemble Seal Assembly which was

removed in Step 2. (See Photo 29.)

33. Temporarily install lower half of Seal Assembly to lower Bearing

Housing. (See Photo 30.)

DO NOT MOVE THRUST COLLARS

CAUTION


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Photo 31

34. Measure distance from Shaft to Seal Assembly. All four (4) corner

measurements should be equidistant with 0.030 inches tolerance. Adjust

as needed by moving Bearing Housing. (See Photo 31.) Torque Bearing

to Pedestal Bolts to correct value indicated in Section 5.10.

35. Remove lower half of Seal Assembly installed in Step 33.

NOTE

Insure that all Bearing internal parts are cleaned of all

foreign matter.

36. Remove eye bolts from top of the Sleeve Assembly and place back in

top half of Bearing Housing.

The following accessories, if applicable to this contract, should now

be installed.

1. Oil Thermometer

2. Oil Thermoswitch

3. Reservoir Heater

4. External Lubrication Supply and Return Connections.

5 Any Other Accessory which Penetrates into Oil Sump

INSURE THAT SLEEVES AND JOURNALS ARE

LUBRICATED PRIOR TO ROTATING ROTOR.

AT THIS POINT SLEEVE SPLITS MUST BE

HORIZONTALLY IN-LINE WITH HOUSING SPLITS.

ADJUST IF NECESSARY.

CAUTION


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Photo 32

Photo 33

37. Install Spherical Washer on Spherical Seat on top half of Bearing

Sleeve. (See Photo 32.)

38. Apply thin film of rubber sealing compound (Permatex #2 or equal)

to both sides of Housing Flange Gasket. Install Gasket on lower Bearing

Housing flanges. Insure that holes in Gasket line up with holes in flange.

(See Photo 33.)

NOTE

Do not apply sealing compound if Bearing will be

disassembled again prior to start-up.

NOTE

On 7-inch and 8-inch Bearings, it is necessary to reinstall

the Side Jack Bolts and Spherical Washers which were

removed in Steps 9 and 13. Side Jack Bolts should be

installed finger-tight only.

39. Bearings must now be thoroughly inspected and cleaned internally in

order to remove all contaminants. A magnetic probe is recommended to

remove metallic particles.

NOTE


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Photo 34

Photo 35

40. Lift and lower upper Bearing Housing half utilizing eye bolts at each

end. Check that dowel pin and bolt holes in upper half line up with

respective holes in lower half without forcing into position. If interference

occurs, contact HBI Technical Service Department. (See Photo 34.)

41. Install all Bearing Housing bolts which were removed in Steps 6 and

7, finger-tight. (See Photo 35.)

NOTE

Upper and Lower Housings are machined as a unit and

must be assembled accordingly. Line up match-marks on

machined Bearing ends.

42. Insert Housing taper dowel pins (removed in Step 10) into holes

located in Housing flanges. Pins should be installed with the small

diameter downwards. Tap in carefully until tight. Remove hooks from eye

bolts. (See Photo 36.)


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Photo 37

Photo 38

43. Torque all Bearing Housing bolts to values listed in Section 5.10.

44. Align Spherical Washer with Jack Bolt hole in top of Bearing


45. Install top Jack Bolt. Torque to appropriate value as follows:

Bearing Size Torque

8 Inches 75 Ft/#

7 Inches 65 Ft/#

6 Inches 55 Ft/#

5 Inches 45 Ft/#

3- 15/16 Inches 35 Ft/#

2- 15/16 Inches 25 Ft/#

(See Photo 38.)

NOTE

On 7-inch and 8-inch Bearings, tighten one side Jack Bolt

to 10-15 Ft/#. Tighten other side Jack Bolt to 50 Ft/#.

46. Tighten Jack Bolt Locking Nut(s). (See Photo 39.)

47. Install Oil Filler/Inspection Caps removed in Step 8.


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Photo 40

48. Clean and reinstall Cooling Pipes removed in Step 5. Coat threads

with light coat of sealing compound (Permatex #2 or equal). Tighten

Cooling Pipes securely.

49. Loosen Allen set screws on four (4) Cooling Pipe Seal Collars. Tap

Collar and Seal into position on top of Bearing Cap. Tighten Allen setscrew snug. Tap top of Collar to compress rubber Seal slightly. Tighten

Allen set screw. (See Photo 40.)

NOTE

If a Pressurized Cooling Water System is to be used, the

Cooling Pipe Connections into the Sleeve should be

pressure tested at this time. The Sleeve has been factory

tested to 50 PSI. This pressure should not be exceeded. If

leakage occurs, find and correct the problem.

50. Apply a thin coat of sealing compound (Permatex #2 or equal) to one

side of Seal Assembly Gasket(s) removed in Step 2. Install Gasket(s) to

Bearing Housing, carefully aligning holes. (See Photo 41.)


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Photo 42

Photo 43

51. Apply a thin coat of sealing compound (Permatex #2 or equal) to

lower half of Seal Assembly(ies) and install finger-tight on lower Bearing


52. Slide Cork Seal into machined groove in lower Seal Assembly. The

recessed Retainer Spring slot in Seal should be facing away from Shaft.Slide Retainer Spring into Seal and wrap Cork Seal around Shaft,

fastening ends of Spring together. Ends of Cork Seal must mate when

Seal is snug on Shaft. (See Photo 43.)

NOTE

Procedure is for typical Single Cork Seal arrangement. See

Figure 6.2-2 for other Seal Arrangements which may be

provided. Consult Contract/Main Assembly Drawing for

Seal Arrangement provided. Assembly of all Seal

Arrangements is similar to that described above.


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1. Single Cork Seal Retainer 2. Double Cork Seal Retainer


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Photo 44

Photo 45

53. Apply a thin coat of sealing compound to all mating surfaces of the

upper half of Seal Assembly(ies). Install Seal Assembly over Seal and

fasten bolts finger-tight to Bearing Housing. (See Photo 44.)

54. Install two (2) bolts in Seal Assembly horizontal flange and fasten

finger-tight. (See Photo 45.)

55. Snug up Seal Assembly bolts to Bearing Housing.

56. Snug up Seal Assembly horizontal flange bolts.

57. Alternate between Seal Housing bolts and flange bolts, gradually

tighten to torque values listed in Section 5.10. This should be done in at

least two (2) steps to insure horizontal and vertical joints are true.


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Photo 46

Photo 47

58. Install Oil Sight Level Gauge in plugged hole in lower half of Bearing

Housing. (See Photo 46 and 47.)

59. Fill the Bearing with oil through either Oil Filler/Inspection opening.

Fill Bearing until oil level in Sight Gauge is level with bottom bolt in Seal

Assembly.

NOTE

If Fan will not be operated for up to two (2) months, turnRotor at least five (5) times while filling both Bearings to

coat critical surfaces to prevent rust.

Turn Rotor at least five (5) rotations each week while

pouring in a pint of oil to continue protection.


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STURTEVANT HD BEARING


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Bearing description

The Sturtevant Heavy Duty sleeve bearings are available in eight (8) sizes ranging from 3 15/16

These bearings have a split self-aligning design and can be furnished for non-cooled, air-cooledcooled operation. They can also be arranged for circulating oil system use. The babbitted sleeve

furnished with a cylindrical bore to maintain a close control of the oil film.

These bearings have been designed with the following features:

A positive oil disc system that provides lubrication to the shaft journal within a few rev

upon start-up for operation at all speeds above 100 RPM, and during coast down. An odisc is fastened to the thrust collar on the rotating shaft to continuously carries oil fromreservoir in the lower housing. This oil is transferred from the disc to a scoop and guid

above the sleeve, which channels this oil into the journal area and thrust face through a

the sleeve. This oil lubricates and cools the journal and thrust surfaces and returns to th

to remove the generated heat. This system provides an uninterrupted flow of oil from tconveyor disc to the shaft journals whenever the shaft is rotating.

The sleeve and housing halves are machined with mating spherical surfaces to provide

support. The spherical sleeve support of the bearing housing furnishes the selfaligninthe bearing to provide increased alignment capability and stiff rotor support.

The bearings are designed with a straight through cooling system to provide contamina

operation. The heat transfer surface of the bearing is located in the lower housing half a

straight through the oil reservoir. As the oil circulates over the sleeve and journal surfaonly provides lubrication, but absorbs the heat generated by the bearing. This heat is r

from the reservoir by the coolant running through the straight through transfer surface e

the possibility of coolant leaking into the oil.

The bearings are provided with a felt wiper at each end of the bearing housing. A corklow speed or bushing type seal for high speed operation is located outboard of the felt s

Auxiliary seals can be furnished to provide increase protection to the oil.

The bearing sleeve and housing are split into upper and lower sections to permit easy inand maintenance. The sleeves are removed or replaced by rotating out the lower half f

lower housing half. To reduce downtime, all the water and oil connections are located

lower half of the bearing housing, which eliminates breaking these connections for norinspection and maintenance.

Refer to the Howden Instruction Book under Section 6.1 for installation, cooling arrangement da

accessories, lubricant selection, start-up, and maintenance of these bearings. Additional inform

pertaining to the piping schematic and bearing connection arrangement for flood lubrication (Cisystem) is available in Section 7 of these Instruction Books


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Thrust Collars

Thrust Collar Identification:

Standard thrust collars are identified on the following drawings:

Inboard Thrust Collar 696B601

Outboard Thrust Collar 696B602

Standard thrust collars are designed to be factory installed and finish machined on the shaft.

Field replacement collars are machined complete and have tapped holes for handling purposes. Nmachining is required after installation.

Field Replacement Inboard Thrust Collar 1591B34

Field Replacement Outboard Thrust Collar 1591B35

Inboard collars are different from outboard collars in that inboard collars have additional machin

drilled and tapped holes to accept the oil conveyor disc. Inboard collars may be substituted for o

collars, but not vice-versa.

Orifice Partition

The satisfactory operation of a self contained oil-film journal bearing depends on its ability to co

transfer oil from its sump to the cavities between the bearing sleeve and the shaft. In a HD bear

process is carried out by the orifice partition, the oil conveyor disc, and the oil scoop and guide.

The orifice partition is located at the sump level of a HD bearing. It acts as a dam and has a hole

which are located and sized to allow the proper flow of oil to be deposited into the oil conveyor

oil conveyor disc is fastened to the shaft through the bearing inboard thrust collar and rotates at

rpm. The oil conveyor disc carries the oil to the top of the sleeve where the scoop and guide direinto the sleeves oil passage.

The proper function of the orifice partition is dependent on the distance between itself and the odisc. It is therefore dependent on the location of the expansion bearing collar.

There are two types of orifice partitions available for the HD bearing. They are the standard orif

partition and the orifice partition with trough. The orifice partition with trough must be used whdistance between the orifice partition and the oil conveyor disc exceeds certain limits based on b

Calculations are made taking into account temperature and shaft expansion, to determine the ori

type required (consult Howden Buffalo).



59/140

Seal Applications

The seals offered as standard on H.D. bearings are as follows:

Rotating cork seals - All sizesBushing seals - Sizes 6 and up

Auxiliary dust seals - All sizes

Special bolt-on labyrinth (BOL) type seals should be applied to all 5 H.D. applications at 1800

greater. Refer to factory for price and delivery.

Bearing seals should be selected based on application in accordance with the following Seal AppCharts. It is recommended whenever space is available that auxiliary dust seals be applied as we

OPEN INLET APPLICATIONS (Note 1)

Bearing Size 1800rpm

1500rpm

1200rpm

1000rpm

900rpm

720rpm

3 15/16 C C C C C C

5 BOL C C C C C

6 B B B B C C

7 B B B B B C

8 B B B B B B

10 B B B B B

12 B B B B

14 B B B

INLET BOX APPLICATIONS

Bearing Size 1800rpm

1500rpm

1200rpm

1000rpm

900rpm

720rpm

3 15/16 C C C C C C

5 BOL C C C C C

6 B C C C C C

7 B B C C C C

8 B B B C C C

10 B B B B C


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61/140



62/140

Short Ended Heavy Duty Bearing (SEHD)

In 1983 a short housing version of the 5 HD bearing was designed. The intent was to use this b

retrofit for SAWC and SARO bearings and, on new applications, to take advantage of the oppor

reduce bearing spans, reducing the rotor weight by reducing the size of the shaft forging. This recost savings.

The 5 SEHD is essentially a standard 5 HD with a modified housing. The housing overall leng

reduced by approximately 2 inches on the end away from the oil conveyor disc making the hous

symmetrical about its centerline. The bearing mounting footprint and centerline height are identstandard HD bearing.

In order to take advantage of the opportunities to reduce bearing span (compared to a standard Harrangement 3 type fans or to reduce bearing-to-impellor overhand distances on arrangement 1 t

the SEHD must be installed with its short end towards the fan casing. This places the oil convey

the bearing end away from the fan casing. This is opposite of the conventional HD bearing insta

which has the oil conveyor disc end of the bearing nearest the fan casing.

The SEHD may also be applied where reduced bearing span or reduced overhang is not required

reduced overall length is needed. For these circumstances, the bearing may be oriented with eith

closest to the fan casing.

The operating limits of the SEHD (speed, load, temperature, oil film thickness) are the same as

standard HD.

A special reduced thickness thrust collar must be used on the short end of the non-expansion bea

reduced space inside the bearing housing (P/N 4495B63).

For further description and dimensions of the SEHD bearing refer to the following drawings:

Outline Drawing 2091F38

Assembly & Outline 2091F33

Bolt-On Seals (Labyrinth Type)

In 1989, a bolt-on labyrinth type seal was designed for the 5 H.D. bearing as a retrofit to combaleaking problems encountered on 1800 rpm applications. For these applications it was found tha

was critical, and therefore, a special orifice partition and oil level sight gage must be furnished w

seals.

In 1991, it became policy to apply the bolt-on seal package to all new 5 H.D. and SEHD bearin

were to be operated at or above 1800 rpm.

Assembly drawing numbers are as follows:



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Oil Disk Wipers (Slow speed operation)

The oil disk wiper is an optional feature of the H.D. bearing which should be applied to all self-bearings which are expected to run for significant periods of time at slow speeds (less than 100

as turning gear applications. Its purpose is to assure that a sufficient flow of oil is furnished to th

journal when the flow of oil produced by the oil conveyor disk may not be sufficient due to low

operation.

The principle of operation of the oil disk wiper is simple. The wiper is a strip of rubber fastened

bearing cap internal to the bearing housing. It is positioned over the oil conveyor disk to act as asqueegee , removing excess oil from the OD of the disk and directing it into the scoop and gui

It is not necessary to provide oil disk wipers on bearings with forced feed lubrication systems. T

feed system provides a constant flow of oil regardless of the bearing operating speed.

Oil disk wiper assemblies have been developed for bearing sizes 5 through 10 (including the 5

Refer to assembly drawing 2467D96. For field installation details refer to drawing 5943C04.


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Sturtevant Bearing Drawing Key Sheet.x

Flat Washer 109A785H028 2 109A783H036 2

Lockwasher 109A871H011 2 109A871H011 2 109A871H011 2 109A871H011 2 109A871H013 2


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Seal Ring 5242C34H001 4 5242C34H002 4 5242C34H002 4 5242C34H003 4 5242C34H004 4

Spacer 5242C35H001 3 5242C35H002 3 5242C35H002 3 5242C35H003 3 5242C35H004 3

End Cap 5242C36H001 3 5 242C36H002 3 5242C36H002 3 5242C36H003 3 5242C36H004 3

Seal Retainer Assembly 7625A14 1 7625A14G001 1 7625A14G003 1

Retainer Plate 2293C26H001 2 2293C26H002 2

Lockwasher 109A871H011 2 109A871H013 2

Hex Head Cap Screw 100A912H019 1 100A914H013 1

Bushing Seal Assembly 7624A92G001 3 7624A92G002 3

Wave Spring 5976A04H002 5 5976A04H003 5

Bushing Seal Assy. 5910C54G001 4 5910C54G002 4

Dowel Pin 70310DP0B1 70310DP0B1

Seal Ring 5910C54H002 4 5910C54H003 4

Bushing Seal Casting 4309B21H001 3 4309B21H002 3

Oil Seal Spring 696B586H012 10 696B586H005 10

Thrust Collar (Inboard) 696B601H004 10

Field Thrust Collar (Inboard) 1591B34 3

Thrust Collar (Outboard) 696B602H004 8

Field Thrust Collar (Outboard) 1591B35 3

Non-Expansion Thrust Collar 4495B63 2

Specials

HD Bearing (flow diagram) 247C403 1

Oil Disc Wiper Assembly 2467D96G006 2

Installation Drawing 5943C04 1 5943C04 1 5943C04 1 5943C04 1

Bearing Housing Modification 2297C73 3 5941C16 1 5948C80 1 270C982 4

Cover Plate 4496B94H001 1 4497B01H001 1 4496B94H001 1 749B976H002 3

Wiper Support 1541C81H006 4 1541C81H006 4 1541C81H006 4 1541C81H003 4

Holding Bar 5982A24H003 3 5982A24H003 3 5982A24H003 3 749B979H002 2

Wiper 2541A74H003 5 2541A74H003 5 2541A74H003 5 2541A74H002 5

3

Sturtevant Bearing Drawing Key Sheet.x

Flat Head Machine Screw

Socket Head Cap Screw 2467D96H018 2 2467D96H018 2 2467D96H018 2 2467D96H005 2


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Hex Head Cap Screw 2467D96H022 2 2467D96H022 2 2467D96H022 2 2467D96H021 2

Hex Head Cap Screw 2467D96H023 2 2467D96H023 2 2467D96H023 2

Special High Speed Lab Seal 5943C59 1

Seal 2452D07G001 4

Retainer Plate 5926C86H001 3

Seal Ring 5926C86H003 3

Hex Cap Screw 100A910H012 1

Washer 109A783H019 2

Socket Head Cap Screw 103A512H007 3

Sight Gage 5943C59H011 1

Bushing 102A176H008 1

HD Pedestal & Soleplate Assy. 1396B44 10 1396B30 8 3952B40 1 3952B41 1

Pedestal Assembly 1544C48 9 1543C01 8 2321C47 2 5248C62 1

Soleplate Assembly 270C821 12 1543C02 8 1543C04 6 1543C06 7

HD Brg to Pedestal Hardware

100A919H033 1 100A919H035 1 101A146H035 1 101A148H037

102A768H010 1 102A768H010 1 102A768H012 1 102A768H014 1

3332B56H005 3 3332B56H005 3 3332B56H009 3 3332B56H011 3

867A676H003 17 867A676H019 17 867A676H019 17 867A676H019 17

4


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owdHPowereSection 6.1 Heavy Duty Sleeve Bearings


79/140

NOTE

Certain Bearing parts, which are mac

and split for installation, are match-m

correct reassembly. The match-marks

both halves of the parts. Parts are m

and are stamped in numerical sequen

the Bearing do not have the sameHousing may be stamped 18 and the

NOTE

The following installation instructions

of thread locking compound (similar

equal) on all internal threads, and

compound (similar to PERMATEX

#2 or equal) on the Housing split joinSeals. It is recommended that these

until final pre-start up service is perfo

GENERAL

Bearings are shipped complete with all internal parts

packed inside Bearing Housing. Bearings which have

Auxiliary Dust Seals are shipped with seals mounted in

place. End Cover Plates are factory installed and should not

be removed until Bearing is to be installed, to prevent

contamination and/or loss of internal parts.

External accessories such as thermocouples, vibration

detectors, Pedestal Bearing hold-down bolts, nuts, washers

and flood lubrication accessories, if applicable, are shipped

separately.

Photographs are shown adjacent to text, and depict the

preferred methods, under ideal conditions. Actual field

assembly and installation will be more intricate; therefore,

strict attention to all Warnings, Cautions and Notes isrequired.

Refer to applicable Contract/Main Assembly and

Bearing Drawings for identification and location of parts.

PREPARATION FOR INSTALLATION

1. Bearing as received with shipping End Plates in place and all internal

parts packed. Lift Bearing using both eye bolts. (See Photo 1)

NOTE

Bearing Housing bottom has machined surface. PlaceBearing on clean, dry non-abrasive surface.

2. Remove bolts securing End Cover Plates and Auxiliary Dust Seal

assembly (when furnished). Retain heavy End Plate for use on outboard

end of floating Bearing, unless fan shaft is to extend beyond Bearing

Housing (See Contract /Main Assembly Drawing for details)


80/140

Housing (See Contract /Main Assembly Drawing for details).

(See Photo 2)

Photo 2

3. Remove Wave Spring and Bushing Seal with Extension Spring from

recess. (See Photo 3)

NOTE

Bearing without Bushing Seals are furnished with Cork

Seals and Extensions Spring packed inside Bearing.

Photo 3

4. Remove four (4) Bearing Housing flange bolts and nuts. (See Photo 4)

5. Remove four (4) Bearing Housing bolts from upper half of Bearing

Housing assembly. (See Photo 5)


81/140

Photo 5

6. Tapping out from bottom, remove two (2) tapered dowel pins at the two

diagonal corners. (See Photo 6)

Photo 6

7. Using two (2) eye bolts provided, lift off top half of Bearing Housingassembly. (See Photo 7)

NOTE

8. Remove Laminated Shims from between Bearing Housing halves,

retain Shims for later use when reassembling. (See Photo 8)


82/140

Photo 8

9. Remove all internal components, except Sleeve Assembly from inside

the bottom of Bearing Housing half. Store all parts in a clean, dry

environment for later use when reassembling. (See Photo 9)

Photo 9

10. Remove one (1) eye bolt from upper half of Bearing Housing and

screw into threaded hole located at top center of Bearing Sleeve. Lift

Sleeve from lower half of Bearing Housing utilizing eye bolt. (See Photo

10)

SLEEVE ASSEMBLY HAS CRITICAL MACHINEDINTERNAL AND EXTERNAL SURFACES. EXERCISE

CARE IN HANDLING AND STORAGE TO PROTECT

SURFACES. BEARING SLEEVE ASSEMBLY MUST BE

PLACED ON A SOFT CLEAN SURFACE SUCH AS

WOOD

CAUTION

RUST PREVENTATIVE COMPOUNDS AND THEIR

THINNERS CAN BE FLAMMABLE AND/OR TOXIC. ALL

WARNING


83/140

11. Inspect machined bottom of lower Bearing Housing for flatness with

a straight edge. Any high spots around nicks or gouges must be removed

to permit full contact with shims. Install lower half of Bearing Housing

on top of Bearing Pedestal (See Figure 6.1-1). Bearing Housing must be

installed with the Orifice Partition inboard (toward Fan). (See Figure 6.1-3 below, cutaway view of orifice partition.) This end is marked

INBOARD END

Figure 6.1-1

It is essential that two full width shims of approximately 1/16 total

thickness be placed between base of Bearing Housing and top of supportsprior to aligning unit. These shims should be slotted as shown in Figure

6.1-1. (Shims not supplied by HBI).

NOTE

Large fans designed for elevated temperature operation,

may have the floating Bearing supplied with a Trough on

the Orifice Partition as shown in Figure 6.1-2.

The standard Orifice Partition is shown in Figure 6.1-3

Check both Bearing Housing bottom halves and insure that

those with Orifice Partitions having a Trough are installed

on floating bearing side of fan.

NOTE

Shims should be made in two (2) parts and slotted to clear

the Bearing bolts, thus allowing easy installation or

removal. The shims should be solid and extend across the

top of the Bearing Pedestals.

These shims are not for alignment of the fan Rotor to

driver They are used to level the Rotor end-to-end and to

INBOARD END

LOWER HALF

BEARING HOUSING

Figure 6.1-2

WORK MUST BE PERFORMED IN A WELL VENTILATED

AREA, AWAY FROM HIGH HEAT OR FLAME.

PERSONNEL MUST USE APPROPRIATE PROTECTIVE

EQUIPMENT.

12. Bolt lower Bearing Housing to Pedestal, secure with bolts, hardened

steel flat washers and nuts provided. Nuts are to be only finger tight at this

time to allow for adjustment.


84/140

13. Loosen four (4) Socket Head Cap screws securing upper and lowerSleeve halves together. (See Photo 11)

Photo 11

14. Tap out and remove three (3) locating dowel pins. Dowels are straight

shank and should be driven downward to remove. Remove the four (4)

Socket Head Cap screws loosened in step 13. Lift Upper Sleeve Half,using eye bolt and place on wood. (See Photo 12)

NOTE

Bearing Sleeve halves are machined as a single unit and

must be installed or replaced together. A match-mark

number is stamped on each half, on one of the four (4)

recessed bolting bosses. (See Figure 6.1-4)

Photo 12

SET SLEEVES WITH HORIZONTAL SPLIT LEVEL TO

PREVENT TOP HALF FROM SLIDING WHEN DOWELS

ARE REMOVED. PERSONNEL INJURY OR EQUIPMENT

DAMAGE COULD RESULT FROM SLEEVE SLIDING.

WARNING

15. The fixed end of the Shaft with two (2) Thrust Collars is shown. Clean

Shaft Journal and Thrust Collars thoroughly, using solvents (See

WARNING and NOTE following Step 10). It is critical that the Journal

areas and Thrust surfaces are clean and completely free of all foreign


85/140

matter, nicks, burrs, rust, etc. (See Photo 13)

Photo 13

Photo 14

DO NOT ATTEMPT TO MOVE OR ALTER THRUST

COLLARS. THRUST COLLARS ARE PRECISION

MACHINED AND INSTALLED AT THE FACTORY. FOR

AFTERMARKET THRUST COLLAR INSTALLATION,

REFER TO THE FACTORY.

CAUTION

INSTALLATION

NOTE

Before installing Sleeves on Shafts , other non-split

components to be installed with Rotor (Vane and Inlet

Assembly, Pressurized Shaft Seals, etc.) should be placed

on Rotor and securely fastened in their lifting position.

These components, Vane and Inlet Assemblies and

Pressurized Shaft Seals, may have an inner diametersufficient to clear the outer diameter of Sleeve and Anti-

Rotation Pin, however, it is safer to install these items first.

Refer to Section 5.4 - Rotor Installation. (See Photo 13)

NOTE

Historically, bearings with Thrust Grooves on babbitted

Thrust Faces indicated that the Bearing Sleeve must be

installed on the fixed Bearing End of Rotor. Photo 14

shows Thrust Grooves. Grooves were normally furnished

on one Sleeve per Fan only. Today, only grooved sleeves

are supplied and can be used on either fixed or floating

ends.

NOTE

During reassembly, torque all fastenings to values listed in

Section 5.10.

NOTE

The following instructions call for the use of thread locking

compound (similar to Loctite or equal) on all internal

threads and fluid rubber gasket or sealing compound

( i il t P t F A G k t #2 l)

16. Identify location of match-marks in Step 14. (See Figure 6.1-4)

Raise lower Sleeve half to Shaft Journal with extreme care in order to

prevent damage to machined surfaces. (See Photo 15)


86/140

Be sure Bearing Sleeve will be oriented correctly with regard tostepped Thrust Collar. See Step 17, below.

Photo 15

17. While supporting lower Sleeve half, carefully place upper Sleeve half

with machined mounting surface for Oil Scoop and Guide Assembly

facing stepped Thrust Collar. Install locating dowel pins. (See Photo 16)

NOTE

Socket Head Cap screws (Step 18) may be installed - but

not tightened - to assist in alignment.

NOTE

Steps 16 and 17 may be reversed depending on field

conditions.

Photo 16

18. Install and tighten four (4) Socket Head Cap screws securing Upperand Lower Sleeve Halves. Recheck match-marks. (See Figure 6.1-4)

(See Photo 17)

19. Check the axial clearance between Sleeve Thrust Faces and Thrust

Collars (See Main Assembly/Contract Drawing for dimension and

tolerances). (See Photo 18)


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20. Wedge two-piece Felt Seals into machined slots in each end of upper

and lower Bearing Housings. Compress Seals from ends toward center.Ends of Seal must mate, but not overlap. Trim Seals as required.

(See Photo 19 and 20)

IF A DISCREPANCY IS FOUND, DO NOT ATTEMPT TO

MOVE THRUST COLLARS OR SCRAPE BEARINGS.

(CONTACT YOUR HBI REPRESENTATIVE.)

CAUTION

MOVEMENT OF FLOATING BEARING SLEEVE SHOULDBE RESTRICTED WHILE HANDLING ROTOR. IF THERE

IS NO OUTBOARD THRUST COLLAR TO PREVENT

SLEEVE FROM SLIDING OFF END OF SHAFT, TIE OR

TAPE SLEEVE TO INBOARD THRUST COLLAR.

WARNING

Photo 18

Photo 19

21. The Rotor is now ready for installation. At this point any Inlets, Vane

and Inlet Assemblies and non-split Shaft Seals must be positioned and

braced on the Rotor before installing same. (See Section 5 for the Rotor

installation instructions and note prior to Step 16.) (See Photo 21)


88/140

Photo 21

22. Complete leveling of Rotor per Rotor Leveling and Alignmentinstructions in Section 5.7. See Contract/Main Assembly Drawing for

bearing clearance limits applicable to specific fan.

Check clearance between outboard (floating) Bearing Sleeve and

IF BEARING ASSEMBLY IS NOT TO BE COMPLETED

AFTER ROTOR IS SET, INSTALL THE UPPER HALVES

OF THE HOUSINGS TO PROTECT THE BEARING

CRITICAL PARTS WHILE COMPLETING OTHER

ERECTION, ASSEMBLY AND ALIGNMENT

PROCEDURES. BEARINGS SHOULD ALSO BE

COVERED WITH A WATER-REPELLENT MATERIALUNTIL COMPLETELY INSTALLED, OILED AND ALL

SEALS ARE IN PLACE.

DEPENDING ON JOBSITE CONDITIONS, THE

JOURNALS AND THRUST COLLARS MAY REQUIRE A

COAT OF OIL OR OTHER RUST PREVENTATIVE.

THESE COATINGS HOWEVER, WILL CATCH AND

RETAIN DUST AND DIRT WHICH CAN SCRATCH THE

MACHINED SURFACES IF THE ROTOR IS TURNED. IF

THE COATING IS USED, THE BEARING SHOULD HAVETHE TOP HOUSING HALF INSTALLED, TIGHTENED

AND THE END SEALS INSTALLED TO PREVENT

DAMAGE.

CAUTION

23. Measure distance from Shaft to Bearing Housing Seal recess. All four

(4) corner measurements should be equidistant with 0.030 tolerance.

Adjust as needed by moving Bearing Housing. (See Photo 23)

NOTE


89/140

Torque Bearing to Pedestal bolts to correct value indicated in Section

5.10.

Photo 24

25. Install Socket Head Cap screws, lock washers and hex nuts thusjoining the two halves of Oil Conveyer Disc at the outside diameter. Use

Loctite or equivalent, on all Socket Head Cap screws to insure positive

locking. (See note on page 6.1.0.1 regarding Loctite.) (See Photo 25)

Photo 23

24. Install two halves of Oil Conveyer Disc on inboard (stepped) Thrust

Collar, with fins of Disc facing Fan. (On 3-15/16 diameter Heavy Duty

Bearings, Oil Scoop and Guide Assembly is installed prior to Discinstallation - See Step 29). (See Photo 24)

NOTE

Insure that all Bearing internal parts are cleaned of all

foreign matter.

25. Install Socket Head Cap screws, lock washers and hex nuts securing

Oil Conveyer Disc halves at inside diameter. Use Loctite on all Socket

Head Cap screws to insure positive locking. (See note on page 6.1.0.1

regarding Loctite.) (See Photo 26)


90/140

Photo 26

27. Attach Oil Conveyer Disc to Thrust Collar axially with Socket Head

Cap screws and lock washers. (See Photo 27)

Photo 27

28. Measure clearance between inner face of Oil Conveyer Disc andOrifice Partition in bottom of Bearing Housing. Rotate Rotor 360 for a

complete check. Clearance should be between 1/8 to 1/16 unless

otherwise noted on contract drawings for elevated temperature Fans. (See

Photo 28)

ROTOR WILL HAVE TO BE ROTATED TO ALLOW

ACCESS TO ALL HOLE LOCATIONS. INSURE THAT

SLEEVES AND JOURNALS ARE CLEAN AND

LUBRICATED PRIOR TO ROTATING ROTOR.

CAUTION

29. Install Oil Scoop and Guide Assembly to top Sleeve Assembly with

two (2) Socket Head Cap screws and lock washers provided. (See Step 24

for 3-15/16 Diameter Bearings.) (See Photo 29)


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30. The Scoop end of the Oil Scoop and Guide Assembly should have

1/8 clearance between the top corners of the Scoop and the inside

diameter of the Oil Conveyer Disc. This clearance is important in order to

prevent contact during operation and to insure oil flow. (See Section A-A

on Bearing Outline drawing.) Adjust with shims if necessary.

After clearance is obtained, apply Loctite or equivalent to cap screws

installed in Step 29. (See note on page 6.1.0.1 regarding Loctite.)

(See Photo 30)

31. Remove eye bolt from top of the Sleeve Assembly and place back in

top half of Bearing Housing.

The following accessories, if applicable to this contract, should now

be installed:

1. Oil thermometer

2. Oil thermoswitch

3. Reservoir heater4. External lubrication supply and return connections.

5. Any other accessory which penetrates into oil sump.

NOTE

NOTE

Sleeve is shipped with these screws in place.

Photo 29

Photo 30

32. Bearing sizes 3-15/16 and 5 diameters only

Slide Cork Seal into outside machined groove in lower Bearing

Housing. The recessed Retainer Spring slot in Seal should be facing away

from the Shaft. Slide Retainer Spring into Seal and wrap Cork Seal


92/140

p g paround Shaft fastening ends of Spring together. Ends of Cork Seal must

mate when Seal is snug on Shaft. (See Photo 31)

Photo 31

33. Lift upper Bearing Housing half utilizing eye bolts at each side. (See

Photo 32)

NOTE

Upper and Lower Housings are machined as a unit and

must be assembled accordingly. Line up match-marks on

machined Bearing ends. Insure that no interference with

other parts occurs.

NOTE

Bearing size 5/6 through 14 are machined with Seal

recess externally accessible from the ends of the Bearing

Housing.

The Cork or Bushing Seals for these size Bearings are to be

installed in Step 41.

Photo 32

34. Lower upper Bearing Housing half and insure that the Anti-RotationPin located in the top half of the Sleeve encounters no interference with

mating hole in top of Housing. Check that dowel pin and bolt holes in

upper half line up with respective holes in lower half without forcing into

position. If interference occurs, contact HBI Technical Service

35. Slacken lifting cable and with the top Housing half in place, but not

bolted, measure clearance between upper and lower Bearing Housing

flanges using two (2) feeler gauges, one on each side of Housing. (See

Photo 34)


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When completely assembled, the clearance between the spherical

seat of the upper Housing half and the top of the spherical portion of the

upper Sleeve half shall be between 0.001 and 0.004.

This clearance is obtained by installing the Laminated Shim stock,

removed in Step 8, between the upper and lower Housing flanges. This

Laminated Shim stock consists of five (5) layers of 0.002 shim stock.

For proper clearance add 0.002 to the clearance obtained above toobtain the thickness of shim required between the two (2) Housing halves.

(See Photo 35)

Peel off the number of laminations required to obtain the necessary

thickness of shims.

36. Remove upper Housing half. Bearings must now be thoroughly

inspected and cleaned internally to remove all contaminants. A magnetic

probe is recommended to remove metallic particles.

37. Apply rubber sealing compound (Permatex #2 or equivalent) to both

sides of Laminated Shims. Apply thin film only (See Note preceding Step

16). Install shims on flange of lower Bearing Housing being careful to

line up all holes.

NOTE

If fan will not be operated for two (2) months or longer,

coat the Shaft Journals, Thrust Collars and Sleeves

thoroughly with adhesive type oil (STP or equivalent) or

rust preventive compound. Also coat inside of Bearing

Housing.

(See page 6.1.0.22 )

Photo 35

CAUTION

Photo 34

38. Lower the upper Bearing Housing half in place as in Step 34,

following all precautions. (See Photo 36)


94/140

Photo 36

39. Remove hooks from eye bolts. Insert Housing taper dowel pins

(removed in Step 6) into holes located at the two diagonal corners of

Housing flanges. Pins should be installed with the small diameterdownwards, from upper to lower half. Tap in carefully until tight. (See

Photo 37)

Photo 37

40. Install four (4) Bearing Housing bolts and lock washers removed inStep 5, in top half of Bearing Housing and torque to values listed in

Section 5.10. (See Photo 38)

41. Install four (4) flange bolts and nuts joining upper and lower Bearing

Housing halves. (Torque nuts to values listed in Section 5.10.) (See Photo

39)


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42. Bearing sizes 6 diameter and larger only.

Install seals as follows:

Refer to Bearing Assembly and Outline Drawing for location of

Seals. (Felt Seals were installed in Step 20.) (See Photo 40)

Clean and lubricate Shaft in the Seal area to facilitate installation of

Seal.

NOTE

The Bearing is equipped with either rotating Cork or

stationary Bushing Seals as indicated on Contract/Main

Assembly Drawing.

CORK SEAL

To install one-piece Cork Seal type with Extension Spring, place

Extension Spring in slot located in Seal and wrap around Shaft with

Spring away from Shaft. Then fasten ends of Spring together.

Photo 39

BUSHING SEAL

Bushing Seal type with Extension Spring arrangement consists of one

Seal ring, split into two (2) halves, one garter type Extension Spring, and

one Wave Spring to seal against the Seal recess face.


96/140

Install Seal and Retainer Spring on Shaft as shown. Slide Seal alongShaft into Bearing Seal recess and guide the Anti-Rotation Pin into the

hole drilled in the top Bearing Housing. (See Photo 41)

The Seal is precision machined as a unit and must be assembled, or

replaced, as a unit. Look for stamped number match-mark on face of each

Seal half adjacent to split. (See Figure 6.1-5 below)

ANTI-ROTATION PIN

RETAINER SPRING

IN RECESS

WAVE SPRING

IN RECESS

TYPICALMATCH

MARKS

19

19

TOP

BOTTOM OIL DRAIN

Figure 6.1-5

43. Insure Bushing is within recess and does not protrude beyond

Housing. Use straight edge as shown. (See Photo 42)


97/140

Photo 42

44. Insert feeler gauge all around between outer diameter of Seal and

inner diameter of Bearing Housing to verify clearance. (See Photo 43)

Photo 43

45. Place Wave Spring into Seal machined recess. (See Photo 44)

46. Apply thin film of rubber sealing compound (Permatex #2 or equal)

to machined surface on ends of Bearing Housings. With aid of threaded

rods as guide pins, install split Seal Retainer Plate. (See Photo 45)

NOTE


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Photo 45

47. Auxiliary Bearing Seals, if applicable can now be installed. (Removed

in Step 2.)

Outboard end of outboard Bearing will normally have an End Cover

Plate unless Shaft is to extend beyond Bearing Housing (See

Contract/Main Assembly Drawing for details).

All Seal material has a dovetail split to allow installation around the

Shaft. Metal Spacers and End Caps are into two (2) pieces for installation

and metal End Cover Plates are one-piece

Apply thin film of rubber sealing compound (Permatex #2 or equal)

to all mating surfaces of Bearing Auxiliary Seals, Spacers and End Plates

or Cover Plates.

NOTE

Apply compound in a very thin film to avoid seepage into

Bearing internals. Any excess must be thoroughly cleaned

off.

NOTE

Bearing without Bushing Seals are furnished with Cork Seals

and Extensions Spring packed inside Bearing.

Split Retainer Plate is machined on both faces and match-

marked for reassembly as a unit.

Do not allow rubber sealing compound to contact cork or

bushing seal. Clean off all excess material.

48. Open the dovetail split on first Seal and slide over Shaft. Use guidepins to align holes. (See Photo 46)

NOTE

D il j i h f l i Th j i h ld

49. Place two-piece Spacer on first Seal, aligning holes, (insure Spacer

half maintains same split line as Bearing Housing). (See Photo 47)


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50. Install second Seal, using same procedure as first Seal. (See Photo 48)

Photo 48

51. Install two-piece End Cap over second Seal, aligning holes with aidof guide pins and matching split lines with that of Bearing Housing. (See

Photo 49)

Photo 47

52. Install bolts and washers. Torque bolts to values listed in Section 5.10.

Other Bearing Accessories may now be installed on the Bearing.

(See Photo 50)


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Photo 50

53. Fill the Bearing with oil through the inboard Oil and Inspection

opening. (This is located over the Oil Scoop and Guide Assembly that

will guide oil into Journal and Babbit area.)

Fill Bearing to the center of the Oil Sight Gauge. (See Photo 51)

NOTE

If fan will not be operated for up to two (2) months, turn

Rotor at least five (5) times while filling both Bearings to

coat critical surfaces to prevent rust.

Turn Rotor at least five (5) rotations each week while

pouring in a pint of oil to continue protection.

(See page 6.1.0.15 note between Step 36 and 37)

Photo 51

IF BEARINGS WERE COATED WITH A RUST

PREVENTATIVE, BEARINGS MUST BE DISASSEMBLED,

CLEANED AND THEN FILLED WITH OIL AND SHOULD

NOT BE ROLLED IN THE INTERIM.

CAUTION


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Documents

HD and SAWC Bearing Manuals