TM 5-3810-300-24& P-3
2.7.1.2 LIMITING SPEED GOVERNOR
6.
Apply P.O.B. No. 3 sealant, or its equivalent, on
Insert the set screw and tighten it to 20 lb-in
the threads of the piston sleeve; then, thread the
minimum. Be sure to stake the set screw in two
sleeve into the piston until the sleeve extends
places after tightening the screws.
approximately 25/32" from the piston.
7. Install a seal ring in the groove of the piston.
NOTE: Before applying the sealant to a new
8. Position the blocking ring in the spring housing so
set screw immerse the set screw in Loctite
the opening in the ring is in line with the threaded
Primer T or equivalent.
hole. If the spring housing did not incorporate a
blocking ring, the installation of a blocking ring is
2.
Slide the riser over the shaft and against the
recommended. This ring will prevent the piston and
finished surfaces of the governor weights as
seal ring from sliding out the cover end of the spring
housing, and possible damage to the seal ring by
the sharp edges of the threaded hole.
3.
Assemble the riser thrust bearing on the weight
9. Lubricate the inside surface of the spring housing
shaft with the bearing race having the smaller
with an all purpose grease and insert the piston and
inside diameter against the thrust riser. Incorrect
sleeve assembly inside the spring housing at the
installation of the bearing will result in erratic
end opposite to the pipe plug boss.
operation of the governor.
10. Use a new gasket at each end of the spring housing
and attach the cover to the end of the housing (end
4.
Insert the weight carrier and shaft assembly in the
with the boss for the pipe plug) and install the spring
weight housing.
housing on the control housing.
11. Install the low maximum speed adjustment screw
5.
Support the splined end of the shaft on the bed of
and lock nut in the spring housing cover.
an arbor press. Start the shaft end bearing in the
housing and over the end of the shaft with the
Assemble
Governor
Weight
Housing
(Double
numbered side of the bearing facing away from the
shaft. Press the bearing in place with a sleeve that
Weight)
bears against the inner race.
1.
Start the weight pin through the opening in the
CAUTION: This bearing has thrust capacity in
one direction only. Be sure to install the
Place the low speed weight on the pin and slide the
bearing so that the thrust shoulder (Fig. 10 in
pin through.
Section 2.7.1) is toward the governor weights.
Otherwise, the force exerted by the weights
Place two flat washers on the pin next to the low
will pull the inner race and ball assembly away
speed weights.
from the outer race and result in damage to
the bearing and erratic governor operation.
Install the high speed weights on their shafts after
6.
Place the washer (Fig. 5) over the bearing retaining
bolt. Thread the bolt into the tapped end of the
Place the high speed weight on the pin and slide the
shaft and tighten it. Bend the tang on the washer
pin through the weight.
against the head of the bolt.
Place two more flat washers on the pin between the
7.
Place a gasket in the housing, against the bearing.
high speed weights and the carrier. Slide the pin
Apply a Loctite Sealant grade HV or equivalent to
through the washers and into the carrier.
the full 360 circumference of the plug and thread
the plug into the tapped end of the governor weight
Align the indentation in the pin with the set screw
housing. Tighten the plug to 45 lb-ft torque.
hole in the low speed weights. Apply a sealant such
as Loctite grade C or CV or equivalent on the
Install Governor
threads of the screw.
1.
Affix a new gasket (Fig. 5) to the governor weight
housing. Start the splined end of the weight shaft
in the upper blower rotor and position the housing
against the blower end plate.
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