Lukas HT 90 - Page 21

21
Fault Check Cause Solution
Cylinderex-
tends,butdoes
notmaintainthe
pressure
Checkthatall
connectionsarefully
tightened.
Leakyconnection. Tightenloosecon-
nection.
Checkthecylinder
forleaks.
Leaking seals. Havetheleaks
repairedbyan
authoriseddealer,by
personnelspecially
trainedbyLUKAS,or
byLUKASitself.
Internalleakageofthe
handpump.
Havethehand
pumpservicedbyan
authoriseddealer,by
personnelspecially
trainedbyLUKASor
byLUKASdirectly.
Cylinderdoes
notretract,only
partiallyretracts
orretractsmore
slowlythanusual.
Checkthatthe
pressurereliefvalve
onthehandpumpis
fullyopen.
Pressurereliefvalve
onhandpumppartly
closed.
Fullyopenthepres-
surereliefvalveon
thehandpump.
Checkthehydrau-
licuidlevelinthe
pumpsupplyingthe
uid.
Toomuchhydrau-
licuidinthehand
pump.
Drainhydraulicuid.
Checkthatall
couplingsarefully
tightened.
Hydrauliccoupling
loose.
Tightenhydraulic
coupling.
Airinhydraulicsys-
tem.
Venthydraulicsys-
teminaccordance
withsection6.1.
Checkthecylinder
fordamage.
Cylinderreturnspring
isbrokenorother
damageispresenton
thecylinder.
Havethedamage
repairedbyan
authoriseddealer,by
personnelspecially
trainedbyLUKAS,
orbyLUKASitself.
Devicedoesn’t
performatits
givenpower.
Checkthehydrau-
licuidlevelinthe
pumpsupplyingthe
uid.
Insu󰀩cienthydrau-
licuidinthehand
pump.
Topuphydraulic
uid,de-aerate