Engine Equipment
DETROIT DIESEL
GOVERNORS
The mechanical governors are lubricated by oil splash
Horsepower requirements of an engine may vary
from the engine gear train. Oil entering the governor is
continually due to the fluctuating loads; therefore, some
directed by the revolving governor weights to the
means must be provided to control the amount of fuel
various moving parts requiring lubrication.
required to hold the engine speed reasonably constant
during such load fluctuations. To accomplish this
The hydraulic governor is lubricated by oil under
control, one of three types of governors is used on the
pressure from the engine.
engines. Installations requiring maximum and minimum
speed control, together with manually controlled
intermediate speeds, ordinarily use a limiting speed
Service
mechanical governor. Applications requiring a near
constant engine speed under varying load conditions,
Governor difficulties are usually indicated by speed
that may be changed by the operator, are equipped with
variations of the engine. However, speed fluctuations
a variable speed mechanical governor. The hydraulic
are not necessarily caused by the governor and,
governor is used where uniform engine speed is
therefore, when improper speed variations become
required under varying load conditions with a minimum
evident, the unit should be checked for excessive load,
speed droop.
misfiring or bind in the governor operating linkage. If
none of these conditions are contributing to faulty
Lubrication
governor operation, contact an authorized Detroit Diesel
Allison Service Outlet.
TRANSMISSIONS
POWER TAKE-OFF ASSEMBLIES
The front and rear power take-off units are basically
3. Remove the clutch adjusting ring spring lock screw
similar in design, varying in clutch size to meet the
and lock from the inner clutch pressure plate and
requirements of a particular application. The power
adjusting ring. Then, while holding the clutch drive shaft
take-off unit is attached to either an adaptor (front power
to prevent the clutch from turning, turn the clutch
take-off) or the engine flywheel housing (rear power
adjusting ring counterclockwise as shown in fig. 10 and
take-off).
tighten the clutch until the desired pressure on the outer
end of the hand lever, or at the
Clutch Adjustment
These instructions refer to field adjustment for clutch
facing wear. Frequency of adjustment depends upon
the amount and nature of the load. To ensure a long
clutch facing life and the best performance, the clutch
should be adjusted before slippage occurs.
When the clutch is properly adjusted, a heavy pressure
is required at the outer end of the hand lever to move
the throwout linkage to the "over center" or locked
position.
Adjust the clutch as follows:
1. Disengage the clutch with the hand lever.
Fig. 10. Adjusting Clutch
2. Remove the inspection hole cover to expose the
clutch adjusting ring. Rotate the clutch, if necessary, to
bring the adjusting ring lock within reach.
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