TM 5-4940-200-35
CHAPTER 3
SHOP SET MAINTENANCE INSTRUCTIONS
Section I. ENGINE SPEED GOVERNOR AND GOVERNOR ADAPTER DRIVE
25. General
(4) Inspect the bearings for rusted balls or
The centrifugal flyweight-type governor is bracket-
races, fractured races, and galled or
mounted on the cylinder head of the truck engine. The
scored surfaces.
Replace a defective
governor is driven by the generator-welder power takeoff
bearing.
by means of a V-belt, governor adapter drive, and
(5) Inspect all the components for cracks,
flexible cable. The governor maintains constant engine
breaks, or other defects.
Replace all
speed under varying load conditions and prevents the
defective parts.
engine from exceeding the revolutions per minute rate
for which it is adjusted.
When the engine speed
decreases as a heavy load is applied, the governor
the engine speed governor.
spring overcomes the centrifugal force of the flyweights
and moves the throttle lever to open the butterfly valve in
e. Installation and Adjustment .
Refer to
the carburetor to increase the engine speed. The
TM 5-4940-200-12 and install and adjust the engine
limiting action of the governor returns with increased
speed governor.
engine speed.
27. Governor Adapter Drive
26. Engine Speed Governor
a. Removal.
Refer to TM 5-4940-200-12 and
a. Removal.
Refer to TM 5-4940-200-12 and
remove the governor adapter drive and drive pulley.
remove the engine speed governor.
the governor adapter drive.
the engine speed governor.
c. Cleaning, Inspection, and Repair.
c. Cleaning, Inspection, and Repair.
(1) Clean all metal parts, except ball bearings,
(1) Clean all metal parts, except ball bearings,
in an approved cleaning solvent and dry
in an approved cleaning solvent and dry
thoroughly.
thoroughly.
(2) Clean and inspect the ball bearings as
(2) Place the ball bearings in an approved
instructed in paragraph 26.
cleaning solvent until all grease and
(3) Inspect the governor drive bracket for
sludge is loosened. After cleaning, allow
cracks and breaks.
bearing to drain dry.
(4) Inspect the drive shaft for excessive wear,
(3) Dip the bearings in clean light oil, rotate a
burs, and nicks. File smooth all minor
few times, and drain excess oil.
burs and nicks.
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