111
Model
Code
Page
22. Fuel system
1. 9. 1992
6000--8750
223
3
5. Bleed the fuel system (
Op no 222 A
).
6. Adjust the injection timing (
Op B
).
7. Fit the delivery pipes.
8. If the injection pump is changed or if the lubricating oil has
been drained from the pump, fill the pump with lubricating oil
before starting the engine. Open the hexagonal socket plug
on the governor housing and pour in oil.
Filling quantity:
320---engines
0,3 l
420---engines
0,4 l
620---engines
0,6 l
Same oil specification as in the engine.
E. Checking/changing delivery valve
1. Clean the injection pump, injectors and surrounding parts.
Disconnect the delivery pipes.
9052 47800
2. Connect the pressure gauge 9052 47800 to the delivery
valve holder which is to be checked.
3. Rotate the engine with the starter motor, until the gauge
reading is about
330 bar
.
Note!
Pressure rises fast, do not damage the gauge. Get
ready to pull the stop control out as soon as the gauge reading
reaches an adequate pressure value.
4. Let the gauge reading lower at first about
30 bar
. When the
gauge shows 300 bar, observe the reading during one min-
ute. During this time the gauge reading must not lower too
much (max 30---50 bar). If the pressure lowers faster than
specified, the delivery valve must be cleaned or replaced.
Note!
The delivery valve plunger and guide should always be
replaced in pairs.
5. Open the delivery valve holder locking and holder. Remove
the valve spring, plunger and the guide.
6. Rinse the plunger and guide in clean fuel or test liquid and
at the same time rotate the plunger in its guide and press the
sealing surfaces against each other.
