Operating Failures And Their Causes - Pfaff EHH PS Traduction Du Manuel D'utilisation Original

Manual drive stacker EHH PS
English
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Operating Failures and Their Causes

7.1 Electric System
Failure
Hydraulic pump does
not start
Too early battery dis-
charge
7.2 Hydraulic System
Failure
Stacker does not lift
the load (pump ag-
gregate operates)
Stacker lifts slowly
or not at all with
running pump
motor, with or
without load
Pump motor does
not start
Lifted load is no
longer suspended
Loss of oil on the hy-
draulic cylinder
Lifted load lowers too
slowly.
Disposal:
After placing out of service, the pallet truck parts must be disposed of or
recycled in accordance with legal provisions.
Technische Änderungen vorbehalten
Cause
defective fuse
battery discharged
loose cable lug
loose cable connecting plug
abraded bushes in the motor or weakened springs of the
brushes
failure in the contactor
defective wiring to the contactor or motor
silted battery
sulphation or other failure in the battery.
accidental earth contact in the electric system or battery
Cause
load is too heavy, overload valve is actuated
lowering valve does not close or valve face
is leaky due to soiling
pressure relieve valve not correctly adjusted
or valve face is soiled
hydraulic pump is defective.
battery discharged or defect
loose connecting cable.
blown fuse
defective starter relay
abraded brushes in the pump motor or
weakened pressure springs
Defective pump motor
leakage in the hydraulic system
lowering valve does not close or valve face
is leaky due to soiling-
pressure relief valve (pump) is leaky (pump
turns slowly backwards)
sealing elements are worn out
temperature too low - hydraulic oil too viscous
Soiled filter for return flow (lowering valve)
Design changes under reserve
F 08.01.154
Remedy
Replace the fuse
charge the battery
reconnect and tighten
reconnect and tighten
replace bushes with springs
Check and replace
repair
replace battery
replace battery
repair or replace battery
Remedy
reduce the load
clean or replace.
adjust or clean valve
repair or replace hydraulic pump
charge or replace the battery
fix connecting cable
replace the fuses
replace starter relais
replace brushes with springs
replace motor or aggregate
seal accordingly
clean or replace
clean or replace the valve
Replace sealing elements
Discharge the stacker or the hydraulic
system
Let oil flow out of the cylinder
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 ele-
ments
Use original spare parts only
Ventilate the cylinder after reassembly and
oil filling
warm up. (see 6.7)
clean
Sous réserve de modifications techniques !
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