No Working Function With Multiple Actuation; Consumers Lower; Oil Heating-Up; External Oil Leaks - Claas QUANTUM 3500 Service Parts

TIC
4.8.3 No working function
with multiple
actuation
Fault
Function only at consumer with
lowest pressure demand
Insufficient function at one
consumer

4.8.4 Consumers lower

Fault
Internal leak at the directional
control valve too high

4.8.5 Oil heating-up

Fault
System pressure build-up in neutral
position
Circulation pressure too high

4.8.6 External oil leaks

Fault
Oil leak between plates
Oil leak at solenoid
Oil leak at pressure pilot valve unit
Oil leak at screw plug
10/04
QUANTUM
Cause
•
Pump oil delivery too low
•
Non-return valve in load
signalling line leaking as it
does not close its ball or its
ball is missing
•
Ram of directional control
valve works stiffly
Cause
• Control spool or valve body
worn
Cause
•
Incorrect valve mounting
plate, no control oil return
Z - T
•
Directional control valve
does not return fully to the
neutral position as
connecting screws are
tightened too much (30 Nm)
Cause
•
Sealing plate damaged
•
Foreign object between O-
ring and seal surface
•
Seal surface damaged,
possibly due to a blow on
the edge
•
Sealing damaged
•
Sealing nut not locked or
cutting edge of drain plug
damaged
•
Sealing nut damaged
•
Screw plug loose
•
Copper seal damaged
Hydraulics
Remedy
•
Replace or clean pump
Install ball if missing
•
Remove and clean
Remedy
• Replace directional
control valve
Remedy
•
Replace plate
•
Reduce tightening torque
Remedy
•
Replace
•
Clean
•
Dress surface
•
Replace
•
Tighten or replace
•
Replace
•
Tighten
•
Replace
11-101