Hydraulic Pipe Bending Machine

OWNER’S MANUAL

WARNING: Read carefully and understand all

INSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury.

Item# 141805, 426261, 426260

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Thank you very much for choosing a NORTHERN TOOL + EQUIPMENT CO., INC. Product! For future reference, please complete the owner’s record below: Model: _______________ Purchase Date: _______________ Save the receipt, warranty and these instructions. It is important that you read the entire manual to become familiar with this product before you begin using it. This machine is designed for certain applications only. Northern Tool + Equipment cannot be responsible for issues arising from modification. We strongly recommend this machine is not modified and/or used for any application other than that for which it was designed. If you have any questions relative to a particular application, DO NOT use the machine until you have first contacted Northern Tool + Equipment to determine if it can or should be performed on the product. For technical questions please call 1-800-222-5381.

Intended Use:

The Hydraulic Pipe Bender is designed for bending thick-walled pipes (black iron, schedule 40 &80, etc.). There are six different bending dies ranging from 1/2" to 2" for Item# 141805, eight different bending dies ranging from 1/2" to 3" for Item# 426261 and nine different bending dies ranging from 1/2" to 4" for Item# 426260. The Hydraulic Pipe Bender is not designed for bending thin-walled pipes

TECHNICAL SPECIFICATIONS Model (Item#) SF-2 (141805) SF-3(426261) SF-4(426260) Item Unit Bending Dies Inch 2 3 4 Max. working pressure

PSI 6260 8000 8500

Max. off-load pressure

PSI 6686-7258 8000 8500

Max. working load Lbs. 18000 42000 44000 Max. working stroke Inch 9 27/32 16 1/2 16 1/2

O.D MM Ø21.5~60 Ø21.5~88.5 Ø21.5~108 Capacity

Thickness MM 2.75~4.5 2.75~4.5 2.75~4.5 Oil tank capacity Quarts 1 1/4 1 7/8 3 1/8 Bending angle Degree 90°~180° 90°~180° 90°~180° Oil grade # N15 N15 N15 Max. operating force Lbs. ≤110 ≤110 ≤110

SF-2 (141805) SF-3(426261) SF-4(426260) Pipe Size

Schedule 40

Schedule 80

Schedule 40

Schedule 80

Schedule 40

Schedule 80

1/2" YES YES YES YES YES YES 3/4 " YES YES YES YES YES YES 1 " YES YES YES YES YES YES 1-1/4 " YES NO YES NO YES NO 1-1/2 " YES NO YES NO YES NO 2" YES NO YES NO YES NO 2-1/2" N/A N/A YES NO YES NO 3" N/A N/A YES NO YES NO 4" N/A N/A N/A N/A YES NO

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GENERAL SAFETY RULES

WARNING: Read and understand all instructions. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

WARNING: The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions or situations that could occur. It must be understood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied by the operator.

Assembly No special set up is required and little space is needed to operate the bending machine. 1- Assembly of the lower plate: First turn over the cylinder and remove the four hex bolts on the

base of the cylinder. Align the four holes of the lower plate with the holes of the cylinder base, and affix with the hex bolts taken from the cylinder base.

2- Assembly of the upper plate: When the lower plate is assembled, turn the cylinder over and insert two swaging blocks in the hole of the lower plate. Place the upper plate over the swaging blocks and use the die cover shaft (Part# 55) to secure the swaging block and the back oil cylinder seat (Part# 58).

OPERATION Before using, check the hydraulic oil in the cylinder by loosing the vented oil bolt (Figure 1) and visually ensure that the piston inside is covered in oil when the pipe bender is in the horizontal position.

Figure 1: Vented oil bolt

STEPS 1. Tighten release valve (Part# 26) by turning clockwise. 2. Loosen vented oil bolt (Part# 46). 3. Grease die cover (Part# 56), swaging blocks (Part# 68) and the tube to be bent. 4. Lift the upper plate (Part# 64) and affix bending die to the end of the cylinder ram as shown in

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Figure 2. Place two swaging blocks into the holes of lower plate (Part# 54) and place tube in front of them. Turn the swaging blocks so their grooves face toward the tube die (Figure 3).

5. To account for the pipe shortening during the bending process, make sure the pipe extends beyond the swaging blocks, as shown in Figure 3.

Figure 2: Die installed on cylinder ram.

Figure 3: Pipe is installed beyond swaging blocks to account for pipe shortening during the bend.

NOTE: For short pipes, set the swaging blocks closer together, as shown in Figure 4, to ensure that the pipe extends beyond the swaging blocks to account for pipe shortening during the bend.

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Figure 4: Swaging blocks set close together for bending short pipes. 6. Return upper plate to original position and use the advance pump (See Figure 5) to quickly

advance the die. Note: Only one handle is included with the bending machine. The picture below shows a piece of pipe being used as a handle in the advance pump.

Figure 5: Operating pumps and release valve 7. Use the forming pump to apply heavy pressure to bend the pipe to its desired angle. 8. When finished bending, release the pressure by opening the release valve. The ram will

automatically retreat. Lift the upper plate to take out the bent tube. IMPORTANT: • Before use, check the oil in oil tank to make sure there is enough oil to operate pipe bender. • Loosen vented oil bolt to ventilate. • Before bending any pipe, the release valve must be closed. • The outside diameter of pipe must fit the groove of tube die, or else the pipe will be shaken or

the tube die will burst. • The contact surface between tube and the two swaging blocks must be smooth. Coat swaging

blocks with lubricating oil. Make sure a weld seam is not at the bending point. • If air is in the pump, firstly loose the vented oil bolt. Raise the cylinder head to make the pipe

bending machine tilt at 45° position. Then, pressing down the handle until there is no air in the cylinder. When the air emitted, loosen the release valve counterclockwise to make the cylinder ram go back and then place the pipe bending machine horizontally.

• Strictly observe the technical parameters while using the pipe bender. Excessive pressure is unadvisable since it will damage the machine.

• Periodically clean and maintain the machine. Use clean, filtered oil, making sure the filter (Part# 30) is cleaned regularly.

• Lock the vented oil bolt when finished using the machine.

Maintenance • It is basically maintenance free. However, the oil level should be kept constant at about 1 ¼

Qts.(141805), 1 7/8Qts.(426261), 3 1/8Qts.(426260) of quality hydraulic oil. • Too much oil will force the surplus oil to leak from the cylinder seals and possible damage them. • Not enough oil will cause loss of power as air will be sucked in, causing a drop in pressure.

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Figure 6: Vented oil bolt removed from cylinder

Troubleshooting 1. The cylinder ram is extended feebly.

• Check the steel ball in release valve (Part# 26) to see if it has fallen. Then tighten release valve clockwise.

• Check the hydraulic oil to make sure the cylinder (Part# 45) is filled. • Check the vented oil bolt (Part# 46) to see if it is loose. • Change the polyurethane seal ring (Part# 36) in plunger pump. • Remove the air in cylinder.

2. There is air in the plunger pump or there is no oil in the plunger pump. • Remove the air in cylinder. • There isn’t enough oil in the oil tank; add oil • Oil grade isn’t according to standards, change with quality hydraulic oil. • There is dirt in the filter, and it must be cleaned. Dismantle filter with wrench and clean copper

mesh.

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Diagram and Parts List

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PARTS LIST ITEM DESCRIPTION ITEM DESCRIPTION

1 PUMP HANDLE GRIP 41 PISTON-ROD

2 PUMP HANDLE 42 COPPER WASHER

3 FORMING PUMP SUPPORT 43 OIL SEAL GASKET 19*14*2

4 ADVANCE PUMP SUPPORT 44 CAP SCREW M14-2*45

5 SOLID PIN 6*35 45 OIL CYLINDER

6 ROLL PIN 1.5*16 46 VENTED OIL BOLT

7 CONNECTING ROD 47 OIL SEAL GASKET 21*14*2

8 LARGE PLUNGER ROD 48 OIL TANK

9 YX SHAPE SEAL RING D28 49 RUBBER SEAL PD60*80*10

10 LARGE PLUNGER CASE 50 O-RING 95*3.1

11 OIL SEAL GASKET 48*39*3 51 O-RING 16

12 SMALL PLUNGER ROD 52 PIN SHAFT

13 YV SHAPE SEAR RING D16 53 ROLL PIN 3*30

14 SMALL PLUNGER CASE 54 LOWER PLATE

15 OIL SEAL GASEKT 31*24*3 55 DIE COVER SHAFT

16 FOOTSTEP 56 DIE COVER

17 HEX BOLT M8-1.25*20 57 O-RING 20

18 FLAT WASHER 8 MM 58 BACK OIL CYLINDER SEAT

19 PIN SHAFT A6*28 59 OIL CYLINDER SPLICING CAP

20 ROLL PIN 1.5*16 60 GUIDE SLEEVE

21 HEX NUT M12-1.75 61 CAP SCREW M5-0.8*30

22 UNIVERSAL WHEEL 62 HEX BOLT M14-2*25

23 STEEL PEARL 6.5MM 63 SPLIT PIN 14

24 PLUG SCREW M8-1.25*10 64 UPPER PLATE

25 FLAT HD SCR M4-0.7*12 65 SWAGING BLOCK BRACKET

26 RELEASE VALVE 66 PIN SHAFT A10*45

27 NEEDLE VALVE CORE 67 ROLL PIN 2.5*20

28 CHAMPING RING 68 SWAGING BLOCK

29 ROLL PIN 4*10 69 HEX NUT M6-1

30 OIL FILTER 70 FLAT HD SCR M6-1*16

31 PHLP HD SCR M4-0.7*10 71A 1/2" BENDING DIE

32 COMPRESSION SPRING 71B 3/4" BENDING DIE

33 FRONT OIL CYLINDER SEAT 71C 1" BENDING DIE

34 O-RING 95*3.1 71D 1-1/4" BENDING DIE

35 O-RING 58*4 71E 1-1/2" BENDING DIE

36 YX SHAPE SEAL RING D50 71F 2" BENDING DIE

37 FRONT SPRING SEAT 72A 2-1/2" BENDING DIE

38 CAP SCREW M8-1.25*30 72B 3" BENDING DIE

39 TENSION SPRING 73A 4" BENDING DIE

40 BACK SPRING SEAT

For replacement parts and technical questions, please call 1-800-222-5381

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MANUFACTURER’S LIMITED WARRANTY The limited warranty set forth below is given by Northern Tool + Equipment Company Inc., (NTE) with respect to

new merchandise purchased and used in the United States, its possessions and territories.

NTE warrants this product against defects in material and workmanship for a period of 12 months parts/ 12

months labor, commencing on the date of original purchase and will, at its option, repair or replace, free of charge,

any part found to be defective in material or workmanship. This limited warranty shall only apply if this product has

been operated and maintained in accordance with the Owner’s Manual furnished with the product, and has not

been subject to misuse, abuse, commercial use, neglect, accident, improper maintenance, alteration, vandalism,

theft, fire, water or damage because of other peril or natural disaster. Damage resulting from the installation or use

of any accessory or attachment not approved by NTE for use with the products(s) covered by this manual will void

your warranty as to any resulting damage. This warranty is limited to ninety (90) days from the date of original

retail purchase for any NTE product that is used for rental or commercial purposes, or any other income-producing

purposes.

This limited warranty does not provide coverage in the following cases:

1. User does not comply with the instructions and exceeds the claimed capacity.

NTE reserves the right to change or improve the design of any NTE product without assuming any obligation to

modify any product previously manufactured.

No implied warranty, including any implied warranty of merchantability or fitness for a particular purpose,

applies after the applicable period of express written warranty above as to the parts as identified. No other

express warranty or guaranty, whether written or oral, except as mentioned above, given by any person or

entity, including a dealer or retailer, with respect to any product shall bind NTE during the period of the

Warranty, the exclusive remedy is repair or replacement of the product as set forth above. (Some states do

not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.)

The provisions as set forth in this warranty provide the sole and exclusive remedy arising from the sales.

NTE shall not be liable for incidental or consequential loss or damages including, without limitation,

expenses incurred for substitute or related expenses, or for rental expenses to temporarily replace a

warranted product. (Some states do not allow limitations on how long an implied warranty lasts, so the above

limitation may not apply to you.)

In no event shall recovery of any kind be greater than the amount of the purchase price of the product sold.

Alteration of the safety features of the product shall void this warranty. You assume the risk and liability for loss,

damage, or injury to you and your property and/or to others and their property arising out of the use or misuse or

inability to use the product.

This limited warranty shall not extend to anyone other than the original purchaser, original lessee or the person for

whom it was purchased as a gift.

How State Law Relates to this Warranty: This warranty gives you specific legal rights, and you may also have

other rights which vary from state to state.

For questions about your warranty, please call 1-800-222-5381.

Northern Tool + Equipment Co.,

2800 Southcross Drive West

P.O. Box 1499 Burnsville, MN 55337-0499

Made in China