Jungheinrich DFG 425 Operating Instructions Manual page 76

Fault Possible cause
Motor oil – Motor oil level too low
indicator lit
during
operation
Motor – Motor oil level too low
temperature
display in red
– Radiator contaminated
zone
– Coolant level too low
– Fan V belt slipping
Transmission – Tranmission oil level
oil indicator lit too low
during
– Radiator contaminated
operation
Motor running – Travel direction switch
but truck does in neutral
not travel
– Parking brake applied
Truck does not – Transmission oil level
reach max. too low
speed
Lift speed too – Hydraulic reservoir oil
low level too low
– Hydraulic
discharge
contaminated
blocked
Load cannot – Hydraulic reservoir oil
be raised to level too low
max. height.
Steering is – Air pressure in steering
sluggish axle tyres too low
Excessive – Air in steering system
steering play
Action
– Check motor oil level, top up if
necessary
– Check motor oil level, top up if
necessary
– Clean radiator
– Check motor radiator system for
leaks, add coolant if necessary
– Check V belt tension, tighten or
replace as required
– Check transmission oil level, top up if
necessary
– Clean radiator
– Set travel direction switch to required
direction
– Release parking brake
– Check transmission oil level, top up if
necessary
– Check hydraulic oil, if necessary top
up
reservoir – Clean / replace hydraulic reservoir
system discharge system
or
– Check hydraulic oil, if necessary top
up
– Check tyre air pressure, increase to
correct pressure if necessary
– Check hydraulic oil level and top up if
necessary, then turn the steering
wheel several times from one end to
the other.
E 41