TM 5-3895-382-24
NOTE:
Do not rotate the fuel injector nozzle after the fuel
injector nozzle has been tightened to the specified
torque. Rotating the fuel injector nozzle will
cause a broken seal of the antiseize compound
between the threads. A seal which is broken may
allow leakage of combustion gas through the
threads.
Cold Start Advance Unit
Some of the Lucas, Bosch, and Stanadyne fuel injection
pumps have a cold start advance unit. The cold star advance
unit holds the timing of the fuel injection pump in an advance
position when the engine is cold.
NOTICE
It is Important that the electrical connections to the sender
unit are connected correctly. If the cold start advance unit
fails to operate correctly, engine damage may result
because the engine timing will be fully advanced for
normal engine operation.
The cold start advance unit is on the rear of the timing case on
the left side of the engine.
The cold start advance unit on the Lucas and the Bosch fuel
injection pumps operate in a similar manner. As the engine
begins to reach normal operating temperature, the cold star
advance unit energizes. By energizing, the fuel Injection pump
timing is retarded to the correct timing for normal operation.
The cold star advance unit on the Stanadyne fuel injection
pump operates differently. As the engine begins to reach
normal operating temperature, the cold start advance unit will
de-energize. By de-energizing, the fuel injection pump timing
is retarded to the correct timing for normal operation.
NOTICE
Damage to the engine will occur if the engine is load
tested at more than 80 percent of full load with the cold
start advance unit disconnected.
Illustration 59
Lucas DP200 fuel injection pump.
(1) Engine stop solenoid
(2) 3 Amp wire
(3) Sending unit
(4) 3 Amp wire
(5) 6 Amp wire
(6) Fuel injection pump
(7) Cold start advance unit
(8) Start switch
Illustration 60
Bosch fuel injection pump.
(1) Fuel injection pump
(2) 3 Amp wire
(3) Engine stop solenoid
(4) Sending unit
(5) 3 Amp wire
(6) Cold start advance unit
(7) 6 Amp wire
(8) Start switch
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