The coolant switch for the cold start advance unit is
on the rear of the timing case on the left side of the
engine.
When the engine is cold, the sender unit is energized
in order to advance the fuel injection pump timing for
the cold start operation. When the correct
temperature is achieved the sender unit is de-
energized and the fuel injection pump timing is
returned to the normal operating position.
If the switch fails in the closed position, the engine will
run with advanced fuel injection timing. The engine
will have higher cylinder pressure and engine
damage may result.
If the switch fails in the open position the engine will
run with the fuel injection timing in the normal
operating position. The engine will be more difficult to
start. When the engine is cold the engine might emit
white smoke.
Fuel filters
There is one type of fuel filter element that may be
installed to the engine.
The canister type where the fuel filter element has an
internal thread at the top and is fastened to a
threaded adaptor in the fuel filter base.
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UENR0617
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