Problem Possible cause Solution
The ratchet does not take suc-
cessive strokes.
The square drive or the ratchet
spring is defective.
Replace the defective part.
The piston does not fully re-
tract.
Allow the piston to fully retract.
Cycle freely for several strokes.
If the problem persists, check
the reaction pawl.
The linkage between the piston
rod and the drive plates is dam-
aged.
Replace the defective part.
The tool locks onto the nut. The square drive is loaded at
full torque.
Use the disengagement lever
to remove the tool from the nut
or the bolt.
The tool operates backwards. Push the start button to release
the tool.
The tool cannot move freely
from surrounding objects.
Use the disengagement lever
to remove the tool from the nut
or the bolt.
9.2 Pump units
9.2.1 General
Problem
Possible cause Solution
The pump pressure is not re-
peatedly accurate with a fixed
setting.
The pressure control valve is
dirty or defective.
Contact your local HYTORC
representative.
The pump unit operates and
provides pressure, but the tool
does not move.
The hose couplings on the tool
and the pump unit are not se-
cured properly.
Securely tighten the female
coupling to the male coupling.
The pressure in the system
does not increase.
A motor coupling is worn. The
pump makes sounds like peb-
bles in a tin can.
Replace the motor coupling.
9.2.2 Electric pump units
Problem
Possible cause Solution
The motor makes strange
noises and does not provide
pressure (400V pump units on-
ly).
The direction of rotation is in-
correct.
Change the direction of rota-
tion. See
Connecting the power
supply (400V)
on page 22.
The motor does not accelerate
and stops after starting.
There is drop in voltage due to
too thin or too long an exten-
sion cable.
Check the pump unit with the
mains plug directly in the wall
socket. Do not use an exten-
sion cable. See
Power supply
(electric pump units)
on page
22.
The motor operates, but the
tool does not make a complete
stroke.
The remote control cable is
damaged.
Contact your local HYTORC
representative.
The valve block is defective. Contact your local HYTORC
representative.
Troubleshooting
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