9
Lubrication
Check the oil level regularly by removing the
vented oil plug found on the top of the pump
housing. When changing or adding oil, fill the tank
through the Cap Screw. Normally about 820 ml of
ISO VG of 22 or ISO VG of 32 hydraulic oil
is
recommended for model JHPB-20 Hydraulic Pipe
Bender and 1700 ml for model JHPB-30. Lightly
grease all moving parts if necessary.
Troubleshooting
Problem Probable Cause Remedy
Hydraulic unit
does not lift,
Pipe Bender
does not work.
1. Oil low in tank.
2. Air in pump.
3. Worn UN-Ring in ram
cylinder.
4. Function Fail.
1. Make sure there is no oil leaka
e. Check that the
oil level is full.
2. Pump the handle repeatedly until the ram piston
stops to lift. Tilt the pump housing to about 45
degrees. Loose the release valve to allow any
trapped air to escape from the oil tank.
3. Change the UN-Ring (Parts List Item 39).
4. Check if the steel bolt (Parts List Item 43)
touching the release valve (Parts List Item 50)
fell off. If so, tighten the release valve clockwise.
Piston does not
advance or
retract smoothly.
1.
ir inside the oil tank.
2. Low oil in the oil tank.
3. Incorrect oil type.
4. Debris or dirt in the oil
flow.
1. Pump the handle repeatedl
until the ram piston
stops to lift. Tilt the pump housing to about 45
degrees. Loose the release valve to allow any
trapped air to escape from the oil tank.
2. Fill oil.
3. Change to ISO VG of 22 or ISO VG of 32
hydraulic oil.
4. Flush the oil from inside the pump unit with
gasoline.
Leaka
e from
the Ram piston
or Plunger
Piston
Worn Seals Chan
e the seal kits in the seal kits ba
.
Parts
Replacement Parts
Replacement parts are listed in the Parts List on the following pages. To order parts or reach our service
department, call 1-800-274-6848 Monday through Friday (see our website for business hours,
www.waltermier.com). Having the Model Number and Serial Number of your machine available when you
call will allow us to serve you quickly and accurately.
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