CHECKS
Check for 12 volts at remote control switch (wire #56B for upper counterweight
and wire #56C for lower counterweight) while toggling switch.
PROBLEM 29
Counterweight pins will not retract (disengage).
POSSIBLE CAUSES
Setup switch or wiring failure. Solenoid valve failure.
Cylinder failure. Fuse is blown.
No Voltage
Voltage
No Voltage
Voltage
Yes
No
Is voltage present at both solenoid valves?
Is air at counterweight retract cylinder valve port
when disengage position is selected?
Repair or replace problem air control valve.
Yes
No
Yes
No
Is air at counterweight extend cylinder valve port
when engage position is selected?
Replace problem counterweight valve.
Is air pressure system less than
8.3 bar (120 psi)?
Yes No
Adjust or replace pressure regulator.
Repair or replace wiring or
consult dealer/factory.
Check for 12 volts at wire #8SR in remote control.
Test for voltage at remote control.
Replace switch if bad.
Check for 12 volts at fuse F13.
Replace fuse F13.
Yes
No
Repair or replace wiring from PC
to remote control.
Check counterweight pins for binding or seizure.
Yes
No
Repair as required.
Repair or replace problem cylinder.
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