New Holland 905GBL User Manual

7-TROUBLESHOOTING
7-TROUBLESHOOTING###_8_###
Faultcoderesolution
Troubleshooting-Foreword
Thefollowingtroubleshootinginformationwillhelpyouintheunlikelyeventaproblemoccurswithyourequipment.
Readingthetroubleshootingchartiseasy.Theleft-handcolumnwillbetheproblemyoumaybehavingwithyour
equipment.Thecentercolumnexplainsthepossiblecauseorcausesoftheproblem.Theright-handcolumnsgives
youcorrectiveactionsyoucantaketosolvetheproblem.Ifyoufeelunsurehowtohandletheproblemwithyour
equipmentdonothesitatetocontactyourNEWHOLLANDdealerforassistance.
Hydraulicsystems-Troubleshooting
Problem
PossibleCauseCorrection
Themachinecannotbe
operatedatthestart
Lowhydraulicoillevel.
Checkandtopupwithhydraulicoil.
Nooilsupply.
Connectthetractortothepoweroutlet.
Lowsystempressurefrompump.Checkthepoweroutlet.Connectthepump
tothepoweroutlet.
Hydraulichosesincorrectlyconnected.
Important!Checkthatthehosesarecor-
rectlyinstalledtothevalve.
Excessivebackpressure.
Restrictionbetweenthe“in”and“out”port
andthereservoir.
Pressurereliefvalveworkingirregularlyor
settoolow.
Contactyourdealer.
Thehydraulichosesto/fromcontrolvalve
are“blocked”.
Checkhosesandcouplingsforleakage,
abrasionandtwist.
Themachinelosespower
afterfunctioningnormally
Lowhydrauliclevel.
Checkandtopipwithhydraulicoil.
Loosehydraulichoses,leakingmoving
partsorhoses.
Tightenhoses,replacedamagedO-ringsif
leaking.Replacedamagedhoses.
Pistoninliftingcylindersleaks.Contactyourdealer.
Excessivebackpressure.
Restrictionbetweenthe“in”and“out”port
andthereservoir.
Pressurereliefvalveworkingirregularlyor
settoolow.
Contactyourdealer.
Liftingandimplementing
cylindersmalfunctioning,
othercylinders
functioning.
Spooldoesnothavefullstroke.Thespoolmotionshouldbe5/16”orinone
directionor5/8”total.
Loadercontrolvalveortractor’smainrelief
valveisstuckintheopenposition.
Contactyourdealer.
Checkthatthecheckballintheanti-cavita-
tionvalveisseatedproperly.
Cleantheanti-cavitationvalveproperly.Be
surethatitmovesfreelyandiscorrectly
placedorreplaceit.
Non-functioninglifting
andimplementcylinders
Loosehydraulichoses,leakingmoving
partsorhoses.
Tightenhoses,replacedamagedO-ringsif
leaking.Replacedamagedhoses.
Limitationstomovablepartsorhoses.Replacedamagedhosesandmovable
parts.Checkstrippedhoses.
Pistoninliftingcylindersleaks.Contactyourdealer.
Pistonunitdamaged(doesnotseal).Contactyourdealer.
LiftingcylinderpistonrodsbentContactyourdealer.
Wornoutordamagedpistonseal.External
leakage.
Contactyourdealer.
Spooldoesnothavefullstroke.Thespoolmotionshouldbe5/16”inone
directionor5/8”total.
Pressurereliefvalveworkingirregularlyor
settoolow.
Contactyourdealer.
7-1

New Holland 905GBL Specifications

General

Brand	New Holland
Model	905GBL
Category	Construction Equipment
Language	English