English
Electric pallet truck
EGU 14 P; EGU 22 P; EGU 30 P
F8.1.21
Design changes under reserve!
page 31
8.2. Brakes
Failure
Cause
Remedy
Brake is incorrectly adjusted.
Tie bar brake shows no
or not sufficient brake
effect
Brake discs are worn out
Have the brake adjusted by a com-
petent person (see 6.2)
8.3. Hydraulic System
Failure
Cause
Remedy
load is too heavy, overload valve is actuated reduce the load
Stacker does not lift the
load (pump aggregate
operates)
lowering valve does not close or valve face
is leaky due to soiling
clean or replace
pressure relieve valve not correctly adjusted
or valve face is soiled
adjust or clean valve
hydraulic pump is defective
repair or replace hydraulic pump
Stacker lifts slowly or
not at all with running
pump motor, with or
without load.
battery discharged or defect
charge or replace the battery
battery plug is not plugged in
plug in the battery plug
loose connecting cable
fix connecting cable
blown fuse
replace the fuses
defective starter relay
replace starter relay
abraded brushes in the pump motor or
weakened pressure springs
replace brushes with springs
The motor pump does
not start
defective pump motor
replace motor or aggregate
leakage in the hydraulic system
seal accordingly
lowering valve does not close or valve face
is leaky due to soiling
clean or replace
Lifted load is no longer
suspended
pressure relief valve (pump) is leaky (pump
turns slowly backwards.)
clean or replace the valve
Replace sealing elements
§
Discharge the stacker or the hy-
draulic system
§
Let oil flow out of the cylinder, re-
move screwing
§
Dismount the cylinder.
§
Disassemble the hydraulic cylinder
by unscrewing the guide piece
§
Remove the piston guiding
§
Draw the piston rod upwards out of
the guide piece and replace the
sealing elements
Use original spare parts only
Loss of oil on the cylin-
der
sealing elements are worn out
Ventilate the cylinder after reassem-
ble and oil filling
For that see 6.1.
temperature is too low - hydraulic oil is too
viscous
Warm up
Lifted load lowers too
slowly
soiled filter for return flow (lowering valve)
Clean
