Manitowoc 999 Service And Maintenance Manual page 241

999 SERVICE/MAINTENANCE MANUAL
Clutch not engaged; No hydraulic fluid in tank; Blocked charge inlet to pumps; Clogged tank vent;
Check clutch engagement.
Clutch Engaged
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
Check manual override on two or more pumps. Does engine
load when manual override is applied? Make sure all brakes
are applied and swing lock is in place. (See Test 16.)
Pump Loads
Check electrical input from
controller to pump. (See Test 13.)
Manitowoc
Engine runs, but no hydraulic operation.
POSSIBLE CAUSES
Drive train damaged from flywheel to pump mount.
Check hydraulic filter service shut-off valve.
Ok
Clutch not Engaged
Engage clutch.
Pump does not Load
Consult
dealer/factory.
Published 05-16-17, Control # 233-03
Problem 3
CHECKS
Open filter service shut-off valve or
replace filters if necessary.
Not Ok
Service hydraulic system.
TROUBLESHOOTING
Not Ok
10-5
10