CARE AND MAINTENANCE 7
MHL380 D 7.69
7.9.13.5 Blocking off the hydraulic oil on
the tank
To enable repairs to the intake line, the hy-
draulic pump or the hydraulic lines to be un-
dertaken without having to drain the oil from
the tank, the oil supply line to the main pump
can be blocked off.
â–º
Remove the fillister-head screw (222/1) on
the retaining fixture.
â–º
Remove the retaining fixture (222/2).
â–º
Using a fork wrench, turn the square
through 90° from the open position (223/1)
to the shut-off position (223/2).
The marking on the end face of the
square must lie at right angles to
the passage.
When repair work is complete, it is
essential to turn back the square to
the open position (223/1) before the
engine is switched on. Otherwise,
the hydraulic pump will be dam-
aged beyond repair when the en-
gine starts up.
â–º
Fasten the retaining fixture (222/2) once
more with the fillister-head screw (222/1)
and secure with Loctite "blue".
Fig. 222 Blocking off the hydraulic oil
Fig. 223 Direction of flow
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