HyHydrdrauaullic ic ssysystetem / Dm / Diiagagnonosisis as and nd ttroroububle le shshoooottining / g / SSymymptptom om aand nd AcActtioionn 8.8.3939
The fork carriageThe fork carriage
lowers too qulowers too quicklyickly..
The lowering brake valve isThe lowering brake valve is
defective.defective.
Replace the lowering brake valve.Replace the lowering brake valve.
The lowering brake valve isThe lowering brake valve is
incorrectly adjusted.incorrectly adjusted.
Adjust the lowering brake valve.Adjust the lowering brake valve.
Hydraulic oil flows outHydraulic oil flows out
through the air filter.through the air filter.
OOiil l lleevveel l ttooo o hhiigghh.. RReedduucce e tthhe e ooiil l lleevveel l tto o tthhe e ccoorrrreecctt
level.level.
TThhe e ooiil l ffooaammss.. RReeppllaacce e wwiitth h ooiil l wwiitth h tthhe e ccoorrrreecctt
properties.properties.
ConCondensdensatiation in the oon in the oil tankil tank.. DraiDrain the oin the oil out of thl out of the tank ane tank and filld fill
with new hydraulic oil to the correctwith new hydraulic oil to the correct
level.level.
The fork carriageThe fork carriage
bounces when lifting.bounces when lifting.
Air Air in tin the hhe hydrydrauliaulic syc systemstem.. BleeBleed thd the sye system stem thrthrough ough the the lifliftt
cylinders.cylinders.
The hydraulic oilThe hydraulic oil
smells of sulphur.smells of sulphur.
The oil separators in theThe oil separators in the
hydraulic oil are destroyed.hydraulic oil are destroyed.
1.1. ChanChange tge the ohe oil ail and fnd filteilterr..
2.2. FlusFlush thh the come completplete syse system wtem withith
new hydraulic oil.new hydraulic oil.Motor oil has been used andMotor oil has been used and
caused the hydraulic oil tocaused the hydraulic oil to
emulsify with water, whichemulsify with water, which
has then rotted.has then rotted.
Table 8.5Table 8.5
SSyymmppttoomm PPoossssiibblle e ffaauulltt AAccttiioonn
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