Operation
0820−1/A1
Winterthur Gas & Diesel Ltd.
5/ 7
Problem Possible Causes Procedure
Cylinder lubrication is
defective. No lubricating oil
The daily tank is empty. The filter element in
the filter unit is clogged
Fill the daily tank. Clean, or
replace the filter element
There is air in the cylinder lubricating system Bleed the cylinder lubricating
system (the filter, the pump
and the pipes to the lubricat-
ing quills).
One or more lubricating quill(s) in the cylinder
liner are blocked.
Do a check of the lubricating
quill(s). If necessary do an
overhaul of the quill(s) or
replace the defective parts
Flex lube pump is defective There is no servo oil pressure, or the servo
oil pressure is too low
Do a check of the oil supply
pressure. Adjust the pressure
on pressure relief valve
25-8475_E0_2 if necessary
Make sure that the shut-off
valve on the oil supply unit is
closed.
The 4/2-way solenoid valve (CV7131C to
CV713XC), pressure transmitter (PT3131C to
PT313XC) or pump body is defective
Replace the defective parts
(see the documentation of the
flex lube pump manufacturer)
3. Exhaust Valve
Problem Possible Causes Procedure
Exhaust valve Piston in exhaust valve is defective Do an overhaul, or replace
The exhaust valve makes an
unwanted noise
The orifice or filter in the exhaust valve
control unit is clogged
Clean the orifice or the filter
(see Maintenance Manual
5612−1)
The strainer holes in the orifice to the
exhaust valve are much larger (wear)
Replace the orifice
The hydraulic pipe has a leak Repair the leak, or replace
the hydraulic pipe
Exhaust valve does not open The restrictor 35-2751_CX_2 on the exhaust
valve is defective
Replace the restrictor
35-2751_CX_2, or do an
overhaul on the exhaust
valve.
The piston in the exhaust valve control unit
cannot move
Replace the piston or do an
overhaul.
The 4/2-way valve CV7201C to CV720XC is
defective or the cable connection is loose
Replace the 4/2-way valve
CV 7201−08C or connect the
cable connection (see
0525−1)
Exhaust valve does not close The air spring pressure is too low (less than 2
bar)
Find the cause: leakage,
pressure reducing valve,
pressure in starting air bottles
The exhaust valve shank or piston cannot
move
Replace or do an overhaul,
2014
Irregular Operation
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