22
Table 3 - Troubleshooting Chart, Cutter Hydraulic Components
Symptom
Possible Cause
Solution
Maint. Level
1. Piston does not
advance.
Return stroke incomplete.
Manually return the piston.
Operator
Low hydraulic oil level.
Check oil level. Add oil if low.
Operator
Piston release lever loosened.
Tighten piston release lever.
Operator
Automatic retract valve remains
open due to built-up dirt.
Remove built-up dirt.
Service Center
Automatic retract valve not
working.
Replace automatic retract valve.
Service Center
Max. pressure valve dirty or
requires replacement.
Clean or replace max. pressure valve.
Service Center
2. Piston does
not fully
advance and/or
movement is
jerky.
Low hydraulic oil level.
Check oil level. Add oil if low.
Operator
Air bubbles in the hydraulic
circuit.
Operate tool through several full cycles
to bleed air. Check oil level and add
oil if low.
Operator
Max. pressure valve open.
Clean or replace max. pressure valve.
Service Center
Piston gasket worn.
Replace piston gasket.
Service Center
Pump malfunction.
Repair or replace pump.
Service Center
3. Tool performs
with insufficient
force.
Max. pressure valve open.
Clean or replace max. pressure valve.
Service Center
Piston gasket worn.
Replace piston gasket.
Service Center
Pump malfunction.
Repair or replace pump.
Service Center
4. Return stroke
incomplete.
Dirt between piston and tool.
Move the piston to the end of stroke
position, disconnect AC power and
remove any built-up dirt.
Operator
Piston return spring broken.
Replace the piston return spring.
Service Center
5. Piston does not
automatically
retract.
Piston has not reached full
extension.
Fully extend piston and check if it
reverses.
Operator
Debris is wedged under or
beside piston.
Manually retract piston, following the
procedure in Section 11.2, then clean
piston area.
Operator
Retract valve not working.
Replace automatic retract valve.
Service Center
Piston return spring broken.
Replace piston return spring.
Service Center
6. Oil leakage from
tank cover.
Reservoir diaphragm faulty.
Replace reservoir diaphragm.
Service Center
(Refer to Table 2 for electrical component troubleshooting.)
Summary of Contents for EFBE5017
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