TM 5-3810-300-24&P-3
2.7.1.4
LIMITING SPEED MECHANICAL GOVERNOR
(Fast Idle Cylinder)
equipment properly,
it
should
be
removed
and
The double-weight limiting speed governor equipped with
a fast idle air cylinder is used on vehicle engines where
reconditioned.
the engine powers both the vehicle and auxiliary
equipment.
Remove Governor
The fast idle system consists of a fast idle air cylinder
1.
Release any air in the system and disconnect the
installed in place of the buffer screw and a throttle
air
locking air cylinder mounted on a bracket fastened to the
governor cover (Fig. 1). An engine shutdown air
2.
Remove the governor by following the procedure
cylinder, if used, is also mounted on the governor cover.
outlined in Section 2.7.1.
For operation and adjustment of the fast idle air cylinder,
Disassemble Governor
refer to Section 14.3.4.
1.
Disassemble the governor as outlined in Section
Lubrication
2.
Refer to Fig. 2 and disassemble the fast idle
cylinder as follows:
The governor is lubricated in the same manner as the
a. Pull the plunger out of the buffer spring and
limiting speed governor (Section 2.7.1).
cylinder.
b. Clamp the air cylinder in a vise equipped with
soft jaws.
Check Governor Operation
c. Apply pressure on the end of the air inlet plug
and remove the plug retaining ring from the
Governor difficulties should be checked in the manner
groove in the air cylinder.
outlined in Section 2.7. If, after making the checks, the
d. Pull the air inlet plug and seal ring assembly
governor fails to control the engine or
from the air cylinder. Remove the seal ring
auxiliar
from the groove in the plug.
y
e. Insert a 3/32" diameter steel rod in the plunger
opening in the air cylinder and push the piston,
seal ring, dual idle spring and spring follower
out
Fig. 2-Fast Idle Air Cylinder
Fig. 1 - Governor with Fast Idle Cylinder
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