Man D 2866 LE 401, Repair Manual

Page: 102 / 138

1
2
Checking valve timing
101
Note:
If the valve timing is incorrect, serious dam-
age to the engine may result. For this rea-
son, if faults occur in the engine which could
lead to the shrunk-fitted camshaft gear turn-
ing, check that the gear is correctly seated
by checking the valve timing.
Carrying out a check after installation of the
camshaft is also recommended.
Fig. 1
Remove cylinder head cover from 1st cylinder.
Carefully set exhaust valve for 1st cylinder.
Turn engine until the valves of the 1st cylinder are
in crossover.
Turn engine back to approx. 50
_
before TDC, then
forwards to 30
_
before TDC (observe graduation
on flywheel).
Fig. 2
Apply dial gauge with approx 2 mm preload to
valve spring retainer of exhaust valve in 1st cylin-
der and set to - 0 -.
Turn engine in running direction through 180
_
(exhaust valve fully closed).
Read valve stroke from dial gauge.
The valve stroke must be between
5,5 and 6,5 mm.
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