COPYRIGHT © JUNE, 2017 BY GRIZZLY INDUSTRIAL, INC. REVISED JULY, 2020 (BL)NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC. #JH18676 PRINTED IN CHINA

For questions or help with this product contact Tech Support at (570) 546-9663 or techsupport@grizzly.com

MODEL T2797850-TON HYDRAULIC PRESS

INSTRUCTIONS

Figure 1. Model T27978.

EYE INJURY HAZARD!Always wear safety glasses during use to prevent serious personal injury.

INJURY HAZARD!When servicing, always dis-connect tool from air to pre-vent unexpected operation.

125 PSIMAX AIR PRESSURE!

Exceeding this PSI may result in injury/tool damage.

Description QtyAdditional People ................................................. 2Safety Glasses .............................................. 1 Ea.Open-End Wrenches 13, 16, 18, 19mm ...... 1 Ea.ISO VG32 Hydraulic Oil ........................2.5 Quarts

Needed For Setup

Inventory

Description (Figure 2) QtyA. Hydraulic Press Assembly (not shown) ...... 1B. Base Supports ............................................ 2C. Pump Handle .............................................. 1D. Support Rods ............................................. 2E. Press Blocks ............................................... 2F. Angle Braces .............................................. 4G. Hardware Bag (not shown)

• Hex Bolts M10-1.5 x 25 ....................... 12• Hex Bolts M10-1.5 x 30 ........................ 2• Lock Washers 10mm .......................... 14• Flat Washers 10mm ........................... 14• Hex Nuts M10-1.5 ............................... 10• Hex Bolts M16-2 x 35 ........................... 4• Lock Washers 16mm ............................ 4• Flat Washers 16mm.............................. 4• Hex Nuts M16-2 .................................... 4

Figure 2. Inventory items.

FE

D

C

B

Open shipping crate and remove inventory items included inside (see Figure 2).

Workpieces positioned off-center below hydraulic ram can be ejected unexpectedly from force being applied unevenly, striking operator or bystanders with great force. Always ensure workpiece is positioned so force is evenly distributed. STOP and release compression if workpiece shifts during pressing.

-2- T27978 50-Ton Hydraulic Press (Mfd. 12/16)

Identification

A. Winch. Raises and lowers press bed to adjust bed height.

B. Table Plates. Support workpiece during bending operation.

C. Hydraulic Ram. Applies pressure directly to workpiece. Hydraulic ram operates using both incoming air line for rapid downward movement and manual pump handle for slower downward ram movement.

D. Pressure Gauge. Shows tons of force being applied to workpiece.

E. Hydraulic Fluid Reservoir. Holds hydraulic fluid for operation of hydraulic ram.

F. Tank Relief Valve. Releases pressure from hydraulic ram to release workpiece.

G. Air Cylinder Control. Valve controls amount of air released from air line cylinder to hydraulic ram.

H. Air Line Cylinder. Provides pressure to lower hydraulic ram. Maximum incoming air pressure is 125 PSI.

I. Pump Handle. Manually lowers ram into workpiece in small increments.

J. Press Bed. Supports workpiece during pressing operation. Bed raises and lowers using winch.

K. Support Rods. Support press bed at prede-termined heights of holes in machine frame.

A

BC

E

G

K

Figure 3. Machine components.

H

J

F

D

I

1. With the help of two assistants, remove press from shipping crate, hold upright, and attach both base supports (see Figure 4) using (4) M16-2 x 35 hex bolts, 16mm flat washers, 16mm lock washers, and M16-2 hex nuts.

Assembly

This machine and its components are very heavy. Reduce risk of strain or lifting injury by getting lifting help or using power lifting equip-ment such as a forklift to move heavy items.

2. Attach angle braces to each base support using (8) M10-1.5 x 25 hex bolts, 10mm flat washers, 10mm lock washers, and M10-1.5 hex nuts, as shown in Figure 4.

Figure 4. Supports and angle braces installed.

Angle Brace

Base Supports

T27978 50-Ton Hydraulic Press (Mfd. 12/16) -3-

3. Attach hydraulic reservoir assembly to out-side of press frame (see Figure 5) by thread-ing (4) M10-1.5 x 25 hex bolts, 10mm flat washers, and 10mm lock washers through frame mounting bracket into threaded holes of hydraulic assembly.

4. Attach winch to outside of press frame, as shown in Figure 6, using (2) M10-1.5 x 30 hex bolts, 10mm lock washers, 10mm flat washers, and M10-1.5 hex nuts.

Anchoring to Floor

Anchoring machinery to the floor prevents tipping or shifting and reduces vibration that may occur during operation, resulting in a machine that runs slightly quieter and feels more solid.

If the machine will be installed in a commercial or workplace setting, local codes may require that it be anchored to the floor.

If not required by any local codes, fastening the machine to the floor is an optional step. If you choose not to do this with your machine, we rec-ommend placing it on machine mounts, as these provide an easy method for leveling and they have vibration-absorbing pads.

Lag shield anchors with lag screws (see below) are a popular way to anchor machinery to a con-crete floor, because the anchors sit flush with the floor surface, making it easy to unbolt and move the machine later, if needed. However, anytime local codes apply, you MUST follow the anchoring methodology specified by the code.

Machine Base

Concrete

Lag Screw

Lag Shield Anchor

Flat Washer

Drilled Hole

Figure 7. Popular method for anchoring machinery to a concrete floor.

Anchoring to Concrete Floors

Number of Mounting Holes ............................ 4Diameter of Mounting Hardware ................. 3⁄8"

Figure 5. Mounting hydraulic assembly.

Hydraulic Assembly

x 4Frame

Mounting Bracket

Figure 6. Mounting winch to press frame.

Winch

x 2

-4- T27978 50-Ton Hydraulic Press (Mfd. 12/16)

Operating Press1. Rotate tank relief valve (see Figure 8) fully

clockwise to close it. Ensure top relief valve is open 1–2 turns.

2. Engage latch on winch (see Figure 9), and raise press bed to desired height, insert support rods (see Figure 10) into holes in machine frame closest to bed, then lower bed onto support rods.

Figure 8. Hydraulic system relief valve locations.

Tank Relief Valve

Top Relief Valve

Figure 10. Support rod placement.

Support Rod (1 of 2)

3. Connect air valve to incoming air compressor line. Confirm incoming air pressure is 110–125 PSI.

ALWAYS ensure winch latch is engaged when raising/lowering press bed! Engaging latch prevents bed from accidentally dropping if winch handle is released, which may result in crushing injury.

4. Place table plates on press bed (see Figure 12), and place workpiece on table plates.

Figure 12. Table plates positioned on press bed beneath ram.

Table Plates

Press Bed

Figure 11. Air valve movement.

Incoming Air Line

Air Valve

Ram

Figure 9. Winch latch positions.

Disengaged

Engaged

Latch

T27978 50-Ton Hydraulic Press (Mfd. 12/16) -5-

Figure 15. Rotating tank relief valve.

Tank Relief Valve

7. Rotate tank relief valve (see Figure 15) coun-terclockwise to release pressure on ram, then remove workpiece.

MaintenanceThe T27978 50-Ton Press features a fully-sealed hydraulic unit and air cylinder. Periodically check press for loose mounting bolts or any unsafe con-ditions. Thoroughly clean press components on an as-needed basis for best operation.

1. Wipe all dirt and dust off press components.

2. Apply light oil to surface of ram.

3. Check hydraulic ram and press bed sup-port rods for cracks or damage. Replace if necessary.

To clean/maintain press:

6. For precise application of ram force on work-piece, pump handle to increase pressure incrementally. Refer to pressure gauge for actual workpiece pressure (see Figure 14).

Figure 14. Pump handle and pressure gauge.

Pressure Gauge

Figure 13. Air valve components/controls.

Air Valve Tab

Air Line

Air Valve

Workpieces positioned off-center below hydraulic ram can be ejected unexpectedly from force being applied unevenly, striking operator or bystanders with great force. Always ensure workpiece is positioned so force is evenly distributed. STOP and release compression if workpiece shifts during pressing.

5. Lower ram by pressing and holding air valve tab (see Figure 13). Ram should lower smoothly.

-6- T27978 50-Ton Hydraulic Press (Mfd. 12/16)

8

11

12

21

20

9

12

50

27

11

23

22

14

1

45

13

1516

17

18

1923

24

25

1

26

29

30

3332

34

35

11

3637

38

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45

46

10

39

41

48

49

6

36

37

38

51

16

51

52

55

54

53

59

58

57

386061

13

10

7

3736

62

63 64 65

6667

69

70

68

40

T27978 Parts Breakdown

Please Note: We do our best to stock replacement parts whenever possible, but we cannot guarantee that all parts shown here are available for purchase. Call (800) 523-4777 or visit our online parts store at www.grizzly.com to check for availability.

BUY PARTS ONLINE!Scan QR code with your digital device or visit www.grizz ly.com / parts to purchase replacement parts or check pricing and availability.

PARTS STORE

T27978 50-Ton Hydraulic Press (Mfd. 12/16) -7-

REF PART # DESCRIPTION REF PART # DESCRIPTION1 PT27978001 HEX BOLT M22-2.5 X 50 36 PT27978036 HEX NUT M10-1.52 PT27978002 CROSS BEAM 37 PT27978037 LOCK WASHER 10MM3 PT27978003 HEX NUT M14-2 38 PT27978038 FLAT WASHER 10MM4 PT27978004 LOCK WASHER 14MM 39 PT27978039 CABLE PULLEY (LOWER)5 PT27978005 FLAT WASHER 22MM 40 PT27978040 EXT RETAINING RING 20MM6 PT27978006 HEX NUT M22-2.5 41 PT27978041 HEX NUT M14-27 PT27978007 COLUMN 42 PT27978042 KNURLED KNOB M10-1.5 X 38L X 40D8 PT27978008 PRESS BED SUPPORT ROD 43 PT27978043 AIR HOSE 1/4" ID 300-PSI 48"L9 PT27978009 ANGLE SUPPORT BAR 44 PT27978044 PNEUMATIC HAND VALVE 1/4" NPT10 PT27978010 FLAT WASHER 12MM 45 PT27978045 EXTENSION SPRING 1-3/4" X 11" X 1/4"11 PT27978011 HEX BOLT M10-1.5 X 25 46 PT27978046 EXTENSION SPRING PLATE12 PT27978012 BASE SUPPORT 48 PT27978048 HYDRAULIC LINE 1/4" ID 300-PSI 30"L13 PT27978013 HEX NUT M12-1.75 49 PT27978049 HYDRAULIC LINE 1/4" ID 300-PSI 40"L14 PT27978014 CROSS SUPPORT 50 PT27978050 HEX BOLT M8-1.25 X 1515 PT27978015 HEX BOLT M10-1.5 X 25 51 PT27978051 LOCK WASHER 10MM16 PT27978016 FLAT WASHER 10MM 52 PT27978052 HEX NUT M8-1.2517 PT27978017 HEX BOLT M12-1.75 X 30 53 PT27978053 AIR CYCLINDER18 PT27978018 HYDRAULIC RESERVOIR 54 PT27978054 PRESSURE GAUGE RING19 PT27978019 HANDLE 13/16"D X 26-3/8"L 55 PT27978055 PHLP HD SCR M6-1 X 820 PT27978020 PRESS BED 57 PT27978057 90-DEG ELBOW FITTING 3/8" BRASS21 PT27978021 PRESS BLOCKS 58 PT27978058 STRAIGHT FITTING 3/8" BRASS22 PT27978022 PRESSURE GAUGE 59 PT27978059 90-DEGREE BLOCK FITTING 1/2"23 PT27978023 HYDRAULIC RAM 60 PT27978060 LOWER PULLEY SHAFT M12-1.75 X 25 SE24 PT27978024 HEX BOLT M14-2 X 65 61 PT27978061 LOCK WASHER 12MM25 PT27978025 FLAT WASHER 14MM 62 PT27978062 GRIZZLY.COM LABEL26 PT27978026 WINCH 1000LB. 63 PT27978063 MACHINE ID LABEL27 PT27978027 WINCH BRACKET 64 PT27978064 READ MANUAL LABEL29 PT27978029 HEX BOLT M10-1.5 X 30 65 PT27978065 SAFETY GLASSES LABEL30 PT27978030 STEEL WINCH CABLE 5MM 66 PT27978066 AIR DISCONNECT WARNING LABEL32 PT27978032 PULLEY SHAFT M14-1.75, 20 X 210 DE 67 PT27978067 HEX BOLT M16-2 X 3533 PT27978033 CABLE PULLEY (UPPER) 68 PT27978068 LOCK WASHER 16MM34 PT27978034 FLAT WASHER 14MM 69 PT27978069 FLAT WASHER 16MM35 PT27978035 CABLE BLOCK 70 PT27978070 HEX NUT M16-2

Main Parts List