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Certain L4 engines are equipped with a mechani-
cal governor in place of the pneumatic governor.
This governor is set and adjusted before the engine
leaves the factory and no further adjustment
shouid be necessary.
Any settings and adjustments which may be
necessary, as when the engine has undergone a
major overhaulor the fuel pump has been removed,
should only be carried out by trained personnel.
Instrucûons tor adjusÛDg Mechanical Governor.
To carry out the Collowing instructions it will be
necessary to remove the cover, situated at the
front of the govemor, and the govemor housing
rear cover.
,
.1
FIG. T2
]
Preliminary Settings.
1. Ensure that the governor weights move
freely when operated with the finger. If they are
stiff it is probably due to distortion set up in the
weight carrier when holding screws are tightened.
To correct this it will be necessary to remove
carrier plate and see tbat tbe rear face is clean and
free from dirt. See also that tbe front of the fuel
pump gear is clean and free from dirt.
2. Hold the stop controllever on the fuel pump
in the stop position and screw in tbe idling spring
control screw until the spring is coil bound, i.e.,
until adjustment of the screw just begins to move
tbc stop control lever. Wben this position is
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reached, unscrew adjusting screw oDe turn. The
idling spring control screw is situated at the rear
of the fuel pump (See Fig. T .3).
3. Reduce ten sion on mainspring with control
lever in ruil speed position.
4. Set eccentric spring anchorage to innermost
position (R. Min. See Fig. T.l).
5. Place govemor lever in the idle position,
press toes of forked lever on to sleeve tbrust race
and adjust fuel pump actuating lever until this is.
clear of fuel pump push rad by ,tç in. (1.59 mm)
when fuel pump control rad is at maximum fuel
position (See Fig. T.2).
Allen key 5/32 in. across flats is required to
unlock and lock fuel pump actuating lever.
See that, by moving the weights to the outermost
position, the fuel purup control rad moves to the
point of no fuel (within ,tç in. (1.59 mm) of total
control rad movement).
Test Bed Procedure.
A. Start engine and warm up to 160°F. (71°C.),
water and oil.
B. Set engine to rated load and speed. lt win
he necessary to increase the main spring ten sion
FIG. T
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