PROBLEM 3
Engine runs, but there is no hydraulic operation.
POSSIBLE CAUSES
Clutch not engaged, no hydraulic fluid in the tank, blocked charge inlet to pumps, clogged tank vent,
drive train damaged from flywheel to pump mount.
CHECKS
Check the hydraulic filter service shut-off valve.
Ok
Not Ok
Check clutch engagement.
Open the filter service shut-off valve
or replace filters if necessary.
Clutch Engaged
Clutch not Engaged
Engage the clutch.
Remove the vent. Check the fluid level, temperature, and viscosity. In extreme
cold conditions, oil may not flow freely to the pump inlets causing pump
Tank Vent, Oil Level, Temperature, and Viscosity Ok
Not Ok
Service the hydraulic system.
Make sure all brakes are applied. Check the manual override on two or more
pumps. (See Section 2 - Manual Override Tests.) Does the engine load when
manual override is applied?
Pump Loads
Pump does not Load
Check the electrical input from controller to
pump. (See Section 3 - Checking Electrical
Inputs/Outputs.)
Consult your Manitowoc dealer or the Crane
Care Lattice Team.
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