MAK M20, Operating Instructions Manual

Page: 330 / 456

Control Valves
Inspection / Checking
A5.05. 05.09.05.00
30000
M20
en / 05.06.2000 IB022045 1/1
05
Ĺ
See also:
Spare parts list: B1.05.10.2.8614
Time requirement: 1 Pers./ 2,00 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Inspection:
After four years carry out a random test of the low pressure valves.
In case of deficiencies recondition all control valves.
Special grease for all control units see MaK Lubricant Recommendations in A4.05.08.nn
The use of other lubricants may have a detrimental effect on the functioning of the fittings.
General maintenance instructions see “Description to Functional Diagram” in book C .
This will result in a certain cycle for control or inspection depending on the type and
function of the individual control units.
Regulating elements (pressure reducers) must be checked in their circuit after maintenance
work for their setting values and must be reset if required.
Ensure that no air is available at the components to be disassembled or that no air can be
admitted to these.
Prior to disassembly operations and where necessary, measure and mark the position of
valves, lever lengths and lever travels of e.g. actuators, limitations by set screws, and so
on.
Do not disassemble control fittings at random since the built-in springs are somtimes
prestressed. Where a screw or nut is used for the adjustment of the prestressing, first
loosen these completely. Clean the individual components thoroughly and exchange worn
down wear parts. During assembly slightly grease rubber rings and their sliding surfaces
with the prescribed grease.