Hydraulic Pump - New Holland B95CTC Operator's Manual

Hydraulic pump

PROBLEM
Noisy system.
Hydraulic oil drain through tank
breather.
Oil heating.
Oil leaks through the shaft seal.
Foamy oil.
8 - TROUBLESHOOTING
POSSIBLE CAUSE
Worn or damaged pump gears or
pressure plates.
Aeration: air entering the systems at:
suction tube, pump shaft, fittings or
cylinder ring nuts.
Cavitation: system restrictions in the
suction line or in the tank filter.
Water in the system.
The system relief valve vibrates.
Vibrations in the lines.
Cold hydraulic oil.
Wrong oil type.
Tank overfilled.
Aeration: air entering the system at:
suction tube, pump shaft, fittings or
cylinder ring nuts.
Cavitation: Restriction of the suction
filter in the tank.
Low oil quantity.
Contaminated oil.
Too high/low setting of the relief valve. Drain the tank and refill with clean oil.
Oil in system too light.
Oil cooler fins obstructed.
Worn shaft seal.
Low oil level.
Air in the suction system.
Wrong oil type.
8 - 24
CORRECTION
Make a hydraulic pump performance
test.
Make a hydraulic pump performance
test.
Make a visual check and/or a
hydraulic pump performance test.
Check for possible leaks and
eliminate them.
Check the system relief valve; adjust
and overhaul, if necessary.
Visually check.
Check the hydraulic oil operating
temperature.
Change the hydraulic oil.
Check the hydraulic oil level.
Make a hydraulic pump performance
test.
Make a visual check and/or a
hydraulic pump performance test.
Fill the tank.
Drain the tank and refill with clean oil.
Test relief valves.
Drain the tank and refill with oil with
the correct viscosity.
Clean the oil cooler.
Replace the shaft seal and inspect
the pump.
Fill the tank.
Check and tighten the suction lines.
Change the hydraulic oil.