1010
Multi-way valveMulti-way valve
Fault Fault Possible Possible cause cause Corrective Corrective measuremeasure
Safety valve pressureSafety valve pressure
erratic or cannot beerratic or cannot be
adjusted upadjusted up
Pressure adjusting screw loosePressure adjusting screw loose
Readjust pressure and tightenReadjust pressure and tighten
screwscrew
Pressure adjusting spring distortedPressure adjusting spring distorted
or damagedor damaged
ReplaceReplace
Safety valve spool worn or stuckSafety valve spool worn or stuck
Replace or remove, clean andReplace or remove, clean and
reassemblereassemble
Pump Pump malfunctioning malfunctioning Overhaul Overhaul pumppump
Lift motor is off, operatingLift motor is off, operating
the forward/backward tiltthe forward/backward tilt
lever tilts the mast forwardlever tilts the mast forward
Tilt locking valve worn or damagedTilt locking valve worn or damaged
Replace the spool and tiltReplace the spool and tilt
locking valve as an assemblylocking valve as an assembly
Broken Broken tilt tilt locking locking spring spring Replace Replace springspring
Tilt Tilt valve valve stem stem O-ring O-ring damaged damaged Replace Replace O-ringO-ring
Mast erratic when tiltedMast erratic when tilted
forwardforward
Tilt relief valve malfunctioningTilt relief valve malfunctioning
Replace tilt relief valveReplace tilt relief valve
assemblyassembly
Forks drop noticeablyForks drop noticeably
when lift lever is in neutralwhen lift lever is in neutral
positionposition
Excessive wear clearance betweenExcessive wear clearance between
valve body and valve stemvalve body and valve stem
Replace stem according toReplace stem according to
required clearancerequired clearance
VValve stem is alve stem is not centrednot centred
Maintaining valve stem inMaintaining valve stem in
neutral positionneutral position
Cylinder Cylinder seals seals defective defective Overhaul Overhaul cylindercylinder
Overload valve worn or stuck withOverload valve worn or stuck with
dirtdirt
Replace or flush overload valveReplace or flush overload valve
Fails to resetFails to reset
Damaged Damaged or or warped warped return return spring spring Replace Replace springspring
Dirt Dirt between between valve valve body body and and stem stem FlushFlush
Control Control mechanism mechanism catching catching AdjustAdjust
Reset parts are not coaxialReset parts are not coaxial
Reassemble, maintainingReassemble, maintaining
coaxialitycoaxiality
External leakageExternal leakage
Defective Defective O-ring O-ring ReplaceReplace
Poor oil port connector sealPoor oil port connector seal
Check fastening and sealing ofCheck fastening and sealing of
corresponding partscorresponding parts
Loose seal plateLoose seal plate
Clean seal plate and retightenClean seal plate and retighten
boltsbolts
Safety valve lock nut/gasket andSafety valve lock nut/gasket and
inter-gasket connection bolts looseinter-gasket connection bolts loose
FastenFasten
Multi-way valve cannotMulti-way valve cannot
move back and forthmove back and forth
Multi-way valve lever is interferingMulti-way valve lever is interfering
with the valve movementwith the valve movement
AdjustAdjust
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