TM 5-3895-346-14
ENGINE OVERHAUL
VARIABLE SPEED GOVERNOR
The lower governor drive components have
been revised to reduce the clearance between
the riser and the weight shaft. With this change,
additional lubrication is provided to the governor
by an oil tube connected between the oil gallery
in the cylinder block and the governor weight
housing. When replacing the riser assembly,
shaft and carrier assembly, or the complete
governor assembly, the new oil tube must be
installed to provide adequate lubrication.
Examine the riser-thrust bearing for excessive
wear, flat spots, or corrosion. If any of these
conditions exist, install a new riser and bearing
assembly.
Inspect the weight carrier, weights, and retaining
pins for wear.
Figure 4. Bushings in Control Housing.
Examine the fuel pump drive end of the weight
shaft. Replace the shaft if the end is worn or
rounded.
Inspect the bushings in the control housing. If they are worn, drive the bushings out and install new ones.
Press the upper bushing in until it contacts the shoulder in the housing.
Press the lower bushing to the
dimension shown in Fig. 4.
Assemble Control Housing
Refer to Fig. 5 and assemble the control housing as follows:
1. Start the upper bearing, number side up, on the governor operating shaft. Support the shaft on the bed of
an arbor press. Place a sleeve against the inner race and press the bearing against the shoulder on the shaft.
2. Slide the bearing shield on the shaft.
3. Place the operating-shaft lever on the shaft and align the retaining pinholes. Then drive the retaining pin in
place to secure the lever to the shaft.
4. Place the stop lever on the operating shaft and secure it in place with the washer and retaining ring. Then
hook the small spring to the stop lever and operating-shaft lever.
5. Install the lower operating-shaft bearing, number side out, in the weight housing. Install the snapring to
secure the bearing. Lubricate the bearing with engine oil.
6. Insert the operating shaft and lever assembly in the control housing. Tap the shaft into the lower bearing
and install a snapring on the end of the shaft.
7. Apply a good quality sealant around the edge of the plug and tap it in place in the weight housing.
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