MAK M 20 - Valve Clearance; Sequence of Operations

Valve Clearance
Inspection / Adjust
A5.05. 01.01.01.00
1500
M20
en / 30.09.2010 IB021028 1/2
01
See also: 02.01.01.nn
Spare parts list: B1.05.01.2.2107
Time requirement: 1 Pers./ 0,50 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Inspection:
150 operating hours after first commissioning or after basic overhaul, the valve clearance is to
be checked and readjusted, followed by a check after 1,500 operating hours.
Tools:
Turning rod W1 * 2.9100-380
Feeler gauge W2 * 1.9075-3
* not available as figure
Valve clearance (Fig. 1/S):
Inlet0.6 mm
Exhaust:0.8 mm
Readjust the valve bridge position to the valve spindles before each valve clearance adjustment, du-
ring inspections at intervals or due to works at the valve drive components
Sequence of operations:
1. Adjust valve bridge.
1.1 Open decompression valves.
1.2 Remove the hoods without damaging the packing.
1.3 Turn the crank shaft in such a manner that the piston of the cylinder to be adjusted is moved to
the ignition dead center position.
NOTE
The valve clearance shall only be measured with warm engine, i.e. 15 min after the
engine is shut down.