Routine Maintenance
Fuel System
157 157
9811-3400-4
Bleeding the System
!MCAUTION
Running the engine with air in the system could
damage the fuel injection pump. After maintenance,
the system must be bled to remove any air.
2-3-3-11
If the engine fails to start, misfires or if any part of the fuel
system has been disconnected or emptied, bleed the
system as follows:
Note: Small amounts of air will be vented automatically at
the injection pump. Manual bleeding should not be
required after changing the filters if they are filled with fuel
before fitting.
1 Make the machine safe with the loader arm lowered.
Refer to Prepare the Machine for Maintenance.
2 Make sure that there is enough fuel in the fuel tank.
3 Open the right side engine panel. Refer to Access
Panels - Engine Covers.
!MWARNING
Hot oil and engine components can burn you. Make
sure the engine is cool before doing this job. Bleeding
a hot engine could cause fuel to spill on to a hot
exhaust manifold creating a danger of fire.
13-3-1-16
4 Open bleed screw A.
5 Operate the priming plunger B until air free fuel flows
from the bleed screw. Tighten the bleed screw.
!MWARNING
To bleed the injectors you must turn the engine. When
the engine is turning, there are parts rotating in the
engine compartment.
Before starting this job make sure that you have no
loose clothing (cuffs, ties etc) which could get caught
in rotating parts.
When the engine is turning, keep clear of rotating
parts.
2-3-3-8
6 Bleed the injectors
a Slacken one of the injector feed pipe nuts C.
b Crank the engine, when air free fuel flows from the
connection, tighten the nut.
c Repeat steps 6a and b at each injector in turn until
the engine runs smoothly.
7 Close and lock the engine cover.
822980
Fig 112.
CCC
A
B
WW
C
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