New Holland B95C - Hydraulic pump - Troubleshooting

8-TROUBLESHOOTING
Hydraulicpump-Troubleshooting
Problem
PossibleCauseCorrection
Noisysystem.Wornordamagedpumpgearsorpressure
plates.
Makeahydraulicpumpperformancetest.
Aeration:airenteringthesystemsat:suc-
tiontube,pumpshaft,ttingsorcylinder
ringnuts.
Makeahydraulicpumpperformancetest.
Cavitation:systemrestrictionsinthesuc-
tionlineorinthetanklter.
Makeavisualcheckand/orahydraulic
pumpperformancetest.
Waterinthesystem.
Checkforpossibleleaksandeliminate
them.
Thesystemreliefvalvevibrates.Checkthesystemreliefvalve;adjustand
overhaul,ifnecessary.
Vibrationsinthelines.Visuallycheck.
Coldhydraulicoil.Checkthehydraulicoiloperatingtempera-
ture.
Wrongoiltype.
Changethehydraulicoil.
Hydraulicoildrain
throughtankbreather.
Tankoverlled.Checkthehydraulicoillevel.
Aeration:airenteringthesystemat:suc-
tiontube,pumpshaft,ttingsorcylinder
ringnuts.
Makeahydraulicpumpperformancetest.
Cavitation:Restrictionofthesuctionlter
inthetank.
Makeavisualcheckand/orahydraulic
pumpperformancetest.
Oilheating.
Lowoilquantity.Fillthetank.
Contaminatedoil.Drainthetankandrellwithcleanoil.
Toohigh/lowsettingofthereliefvalve.Drainthetankandrellwithcleanoil.T est
reliefvalves.
Oilinsystemtoolight.Drainthetankandrellwithoilwiththe
correctviscosity.
Oilcoolernsobstructed.Cleantheoilcooler.
Oilleaksthroughtheshaft
seal.
Wornshaftseal.Replacetheshaftsealandinspectthe
pump.
Foamyoil.Lowoillevel.Fillthetank.
Airinthesuctionsystem.
Checkandtightenthesuctionlines.
Wrongoiltype.
Changethehydraulicoil.
8-18