Problem 3
Engine runs, but no hydraulic operation.
POSSIBLE CAUSES
Clutch not engaged; No hydraulic fluid in tank; Blocked charge inlet to pumps; Clogged tank
vent; Drive train damaged from flywheel to pump mount.
CHECKS
Check hydraulic filter service shut-off valve.
Ok
Not Ok
Check clutch engagement.
Open filter service shut-off valve
or replace filter if necessary.
Clutch Engaged Clutch not Engaged
Engage clutch.
Remove tank cap and check vent, fluid level, and viscosity. In extreme cold conditions, oil may not flow
freely to pump inlets causing pump cavitation.
Tank Vent, Oil Level, Viscosity Ok
Not Ok
Service hydraulic system.
Check manual override on two or more pumps. Does engine load when manual override is applied?
(See Section 2 - Manual Override Tests). Make sure all brakes are applied and swing lock is in place.
Pump Loads
Pump does not Load
Check electrical input from controller to pump. (See
Section 3 - Checking Electrical Inputs/Outputs).
Consult dealer/factory.
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