Man D 2866 E, Руководство по эксплуатации, Страница: 50 / 64

Checking and setting
48
To check and adjust valve clear-
ance
(by authorized specialist personnel)
The valve clearance for new and over-
hauled engines should be checked after
the first 10 to 20 hours of operation.
Then it should be adjusted every 400
hours of operation.
The valve clearance (see “Technical
Data”) should be adjusted so that the
feeler gauge can be moved between the
valves stem and the rocker arm with a
slight resistance being felt.
Adjustment is made with the adjusting
screw after releasing the lock nut.
Rotate the crankshaft so that the piston of
the cylinder to be adjusted is at firing
TDC. This is the case when the valves of
the synchronous pistons are just rocking.
Valve rocking on cylinder
1 5 3 6 2 4
6
2 4 1 5 3
Adjust valves on cylinder
In order to enable the engine to be rotated
manually during adjustments, there is a
plate with a central hexagon driver fitted
to the front of the crankshaft pulley (bar-
ring device).
2 3 1
1 Inlet valve
2 Exhaust valve
3 Feeler gauge
Cylinder head bolts
General notes
The engine may have either of the follow-
ing two types of cylinder head bolt:
D
Cylinder head bolts with
hex head tightened by the
angle-of-rotation method,
socket size 19
D
Cylinder head bolts with
Torx head tightened by the
angle-of-rotation method,
Torx wrench size E18
Bolts to be used in event of repairs:
Bolts with hex head may be replaced by
bolts with Torx head if all the bolts on the
engine are to be changed.
Do not use bolts with hex head and bolts
with Torx head on the same engine.