Cylinder Head
Maintenance / Disassembly
A5.05. 01.06.01.00
M20
en / 11.07.2001 IB001347 4/4
01
Ĺ
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).
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.
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!
Attention:
Risk of damaging cooling water transition nozzles, cylinder head screws, push rods and
charge air intake nozzles.
10. Place cylinder head down on a wooden support.
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