Problem 29
Crawler pin cylinder(s) will not extend or retract (left or right set).
CHECKS
Check supercharge accessory supply system for 3,000 psi (207 bar) while
enabling selected crawler pin cylinder handle.
POSSIBLE CAUSES
Not in setup mode; Faulty control valve section; Supercharge
accessory supply pump is damaged; Mechanical problem.
3,000 psi (207 bar) Low/No pressure
Repair or replace problem
crawler pin cylinder.
Is crane setup mode select and confirmed?
Yes No
Select and confirm setup mode.
Does system develop any working pressure?
Yes No
Adjust supercharge accessory supply system for
3,000 psi (207 bar) when pin handle is moved.
Consult dealer/factory.
Ok Not Ok
Check supercharge accessory supply pump operation.
Repair or replace supercharge pump.
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