OPERATING INSTRUCTIONS
4006/8 Diesel, May 1998 21
PREPARATION FOR INITIAL START
PRIMING THE FUEL SYSTEM
Turn on the fuel feed from the day tank,
loosen the union on the tee-piece (1) Fig. 6
then operate the priming pump by repeatedly
pressing the rubber button (2) until air free
fuel flows from the union, re-tighten the
union.
Fuel flow circuit Fig. 6
A. Combined fuel filter/water separator
Normal fuel flow
Priming circuit
Loosen the union on the fuel feed pipe (3)
Fig. 7 at the flywheel end of the fuel rail.
Operate the priming pump until air free fuel
flows and re-tighten the union, continue this
operation at the fuel feed union (4) and the
fuel return union (5) at this point one cylinder
will be primed and a considerable amount of
fuel will have reached other cylinders the
engine will run in this condition if a little
unevenly until air is fully vented from the
system.
OPTIONAL CHANGE OVER FILTER
On engines fitted with a change over filter
system prime the system as described
above but prime the filter on the engine feed
side union (6) Fig. 8 before priming the fuel
rail.
Fig. 6
Fig. 7
Fig. 8
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