New Holland Workmaster 25S - Steering - Troubleshooting; Hydrostatic Transmission - Troubleshooting

8-TROUBLESHOOTING
Problem
PossibleCauseCorrection
Thethree-pointlinkage
doesnotmovedown
whencontrolhandleis
movedtodownposition.
Rateofdropcontrolvalvelockedinclosed
position
Turntheknobcounterclockwise,toopen
valve
LiftshaftmovingpartsdamagedSeeyourNEWHOLLANDdealerforser-
vice
OilleakageConnectingpartloosened
Tighten
OilsealdamagedSeeyourNEWHOLLANDdealerforser-
vice
Pipecracked
SeeyourNEWHOLLANDdealerforser-
vice
Steering-Troubleshooting
Problem
PossibleCauseCorrection
Hydraulicsteeringsystem
doesnotwork
SteeringunitdamagedorwornSeeyourNEWHOLLANDdealerforser-
vice
Steeringcylinderpistonsealdamagedor
worn
SeeyourNEWHOLLANDdealerforser-
vice
ExternaloilleakageofoiltubesorhosesSeeyourNEWHOLLANDdealerforser-
vice
Excessivesteeringwheel
effort
Frontaxleisoverloaded
Reducetheloadonthefrontaxle
Faultypowersteeringpump
SeeyourNEWHOLLANDdealerforser-
vice
Powersteeringreliefvalve:pressureset-
tinglow
SeeyourNEWHOLLANDdealerforser-
vice
Cylindermovementnotas
smoothassteeringwheel
Airinsteeringlineifnotusedforalongtime
Bleedairinsteeringsystem
Airinsuctiontube
Checksuctiontube,repairasneeded
CylinderpistonsealdamagedSeeyourNEWHOLLANDdealerforser-
vice
Oilleakageofsteering
pump,steeringunit,
cylinder
SealdamagedSeeyourNEWHOLLANDdealerforser-
vice
Abnormalnoise
Lackofoil
Addoilasneeded
RestrictionofoilowinsuctionlineReplacelter
Airinsystem
Bleedairfromsystem
Hydrostatictransmission-Troubleshooting
Problem
PossibleCauseCorrection
WhenoperatingHST
pedal,tractordoesnot
move.
ParkbrakeisengagedReleaseparkbrake
HSTrangeisin“N”PlaceHSTrangein“L”or“H”range
HSTFiltercloggedReplaceHSTlter
HSTcontrollinkagewornordamagedSeeyourNEWHOLLANDdealerforser-
vice
Tractorisstillmoving
whenHSTpedalisin
neutralposition
IncorrectneutraladjustmentofHSTlinkageSeeyourNEWHOLLANDdealerforser-
vice
HSTpedallinkagedamagedSeeyourNEWHOLLANDdealerforser-
vice
HSTpowerislow
Tractorisoverloaded
Reduceloadfromthetractor
Oilshortage
Addtransmissionoilasneeded
AirinHSTcircuitCheckandrepairthehydraulicsuctionline
HSTltercloggedReplacetheHSTlter
8-3