102
15.10 WINDOW WASH PUMP PROBLEMS
For disassembly and re-assembly procedures of the window wash pump consult section 8.2.4.
15.10.1
Pump does not work
Probable causes
Action
1
Air supply failure
Check the air supply to solenoid V12 in the EPU,
minimum 5.0 bar (0.5 MPa).
Check the air supply to the regulator/lubricator,
minimum 5.0 bar (0.5 MPa).
Check the functioning of solenoid V12 in the EPU.
2
Air cycle valve failure
Check the sleeve and cycling spool (under the cap of
the muffler) for contamination.
Replace if necessary.
3
Electric circuit failure
Check the power supply in the EPU.
Check the connection to solenoid V12 in the EPU.
Check the operation of solenoid V12.
Replace if necessary.
Check the connection between the MCU and the EPU.
15.10.2
Pump cycles without pumping or does not stall
Probable causes
Action
1
No water supply.
Check the water supply to the pump.
2
Check valves not seating or
leaking in the system.
Inspect the inlet check valve.
Inspect the outlet check valve.
15.10.3 False
cycle
Probable causes
Action
1
Leakage from the pilot exhaust
(top centre of the cap).
Check the air section seal.
Replace if necessary.
15.10.4
Fluid appears at muffler
Probable causes
Action
1
High pressure seal leakage.
Check the high pressure seal.
Replace if necessary.
Summary of Contents for OILCON MARK 6M
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