Cylinder Head
Maintenance / Disassembly
A5.05. 01.06.01.00
M20
en / 30.09.2010 IB001347 4/4
01
8.4 Press hydraulic tensioning element (Fig. 3/W4) with pin (W8), by turningdown against the bearing
ring (W6) onto block length (Valve [Z] at the high-pressure pump [W1] is open) and establish gap
of
2.5 mm
(approx. 1 rotation) (Fig. 2/S).
8.5 Close valve (Fig. 3/Z) at high-pressure pump (W1) and at the same time extend all 4 cylinder
head screws continuously with a hydraulic pressure of
p = 600 bar.
8.6 Disconnect round nuts (Fig. 2/12) with pin (W8).
8.7 Release tensioning elements, romove hydr. equipment and screw off round nuts.
9. Mount the cylinder head lifting gear (W11) on the cylinder head by means of the attached
hexagon nut M12x35.
Lift the cylinder head by means of a crane.
Thereby, observe push-rod fitting!
10. Place cylinder head down on a wooden support.
NOTE
If the round nuts cannot be loosened, the cylinder head screw can be further
prestressed with approx.
50 bar.
If the pressure is increased further, there is a risk of the round nut sticking due to
stretching of the bolt thread.
CAUTION
Risk of damaging cooling water transition nozzles, cylinder head screws, push rods
and charge air intake nozzles.
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