TM 5-3810-300-24&P-3
14.14 GOVERNING DEVICE ADJUSTMENT
The power control device is located between the No. I
and No. 2 cylinders on a 3-cylinder engine, between the
No. 2 and No. 3 cylinders on a 4-cylinder engine and
between the No. 3 and No. 4 cylinders on a 6-cylind'er
engine.
Adjustment
After the engine tune-up is completed, adjust the power
control device as follows:
1
Place the vehicle on a chassis dynamometer and
check the maximum wheel horsepower.
2
Loosen the power control spring attaching bolts.
Then adjust the spring until it projects parallel to the
cylinder head when the injector control racks are
held in the full-fuel position. Tighten the spring
attaching bolts to 7-9 Ib-ft torque to retain the
adjustment.
3
Set the power control device, while holding the
injector control racks in the full-fuel position, by
Fig. 2 - Power Control Device
turning the adjusting screw down (clockwise) until it
just touches the spring and the lock nut is tight
The power control (torque limiting) device (Fig. 2) is
against the plate Then release the injector control
used, on some vehicle engines, to limit the maximum
racks.
horsepower output at the wheels without diminishing the
performance at lower speeds where full power may be
NOTE: Wipe the oil from the spring and
required. It limits the horsepower at, or just below, the
the bottom of the adjusting screw so the
normal full-load governed speed.
These limiting
point of contact can be seen readily.
characteristics are proportionately lessened as the
engine speed is reduced and the horsepower required is
4
Start the engine. Then, with the engine running at
reduced.
full governed speed, check the horsepower. If
necessary, re-adjust the screw to obtain the
This device consists of an adjusting screw threaded into
specified horsepower
Turn the screw down to
a plate mounted between two adjacent rocker arm shaft
decrease the horsepower; turn the screw up to
brackets and a spring attached to a clamp on the injector
increase the horsepower. When the desired wheel
control tube.
horsepower is obtained, hold the screw from turning
and tighten the lock nut.
NOTE: The rocker arm shaft bracket
bolts that retain the adjusting screw
NOTE: If a dynamometer is not
plate are tightened to 75-85 lb-ft torque.
available, back up the lock nut the
All other rocker arm shaft bracket bolts
distance stamped on the plate. Then
are tightened to 90-100 lb-ft torque.
turn the screw and lock nut down
together until the lock nut bottoms on the
plate.
Page 412
