Northern Industrial Tools 141805 User manual

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

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
turning clockwise.
STEPS
1. Tighten release valve (Part# 26) by
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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in
ding process, make sure the pipe extends
beyond the swaging blocks, as shown in Figure 3.
Figure 2. Place two swaging blocks into the holes of lower plate (Part# 54) and place tube
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 ben
igure 2: Die installed on cylinder ram. F
Figure 3: Pipe is installed beyond swaging blocks to account for pipe shortening during the bend.
re that
the pipe extends beyond the 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 ensu

F
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igure 4: Swaging blocks set close together for bending short pipes.
below shows a piece of pipe being used as a handle in the advance pump.
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
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.
to make sure there is enough oil to operate pipe bender.
f pipe must fit the groove of tube die, or else the pipe will be shaken or
. Coat swaging
wise to make the cylinder
nder. Excessive pressure is
intain the machine. Use clean, filtered oil, making sure the filter (Part#
Lock the vented oil bolt when finished using the machine.
nt at about 1 ¼
em.
•Not enough oil will cause loss of power as air will be sucked in, causing a drop in pressure.
IMPORTANT:
•Before use, check the oil in oil tank
•Loosen vented oil bolt to ventilate.
•Before bending any pipe, the release valve must be closed.
•The outside diameter o
the tube die will burst.
•The contact surface between tube and the two swaging blocks must be smooth
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 counterclock
ram go back and then place the pipe bending machine horizontally.
•Strictly observe the technical parameters while using the pipe be
unadvisable since it will damage the machine.
•Periodically clean and ma
30) is cleaned regularly.
•
Maintenance
•It is basically maintenance free. However, the oil level should be kept consta
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 th