and hold it until the engine stops. Pulling on the stop
knob manually places the injector racks in the no-fuel
The engine throttle is connected to the governor speed
position. Return the stop knob to its original position
control shaft through linkage. Movement of the speed
after the engine stops.
control shaft changes the speed setting of the governor
Emergency Stop Knob
and thus the engine speed.
In an emergency, or if the engine continues to operate
Engine Starting Switch
after pulling the stop knob, the emergency stop knob
To start the engine, a switch (Fig. 2) is used to energize
may be used to stop the engine. When the emergency
the starting motor. Starting switches may vary in design
stop knob is pulled, the air shut-off valve, located
and their contacts must be rated sufficiently to carry the
between the air intake and the blower, will trip and shut
off the air supply to the engine. Lack of air to the engine
will prevent further combustion of the fuel and stop the
NOTE: Tighten the starting switch mounting nut to 36-
The emergency stop knob must be pushed back in after
Engine Stop Knob
the engine is stopped and the air shut-off valve must be
re-set manually. The cause of the malfunction should
A stop knob is used to stop the engine. When stopping
be determined before the engine is started again.
an engine, the engine speed should be reduced to idle
and the engine allowed to operate at idle for a few
minutes to permit the coolant to reduce the temperature
of the engine's moving parts. Then pull the stop knob
The tachometer is installed at the rear of the engine and
the tachometer drive shaft adaptor is pressed into the
Examine the oil seal for wear or damage, replace if
end of the camshaft. The shaft assembly consists of a
flexible cable with a tang on one end, a drive square on
the opposite end and connecting ferrule and ring. Since
Examine the shaft assembly for fraying or twisted cable,
the shaft assembly is free running no lubrication is
replace if necessary.
Remove Tachometer Drive
If replacement is necessary remove the tachometer
drive shaft as follows:
1. Remove the two capscrews holding instrument panel
to flywheel housing (Fig. 3) and tilt panel enough to
allow clearance for tachometer removal.
2. Remove the capscrews holding the tachometer
assembly to the flywheel housing.
3. Pull back tachometer assembly to the rear removing
it from flywheel housing. Remove drive cover and
4. To remove adaptor from end of camshaft; thread
removing tool J 5901-3 into adaptor; then attach slide
hammer J-2619-5 to the remover. A few sharp blows of
the weight against the slide hammer rod will remove the
tachometer drive shaft.
Use adequate protective measures to
prevent metal particles from falling into the gear train
Fig. 3 - Tachometer Mounting.
and oil pan.