TM 5-3810-300-24&P-3
2.7.1.3
LIMITING SPEED MECHANICAL GOVERNOR
(Variable Low-Speed)
The variable low-speed limiting speed mechanical
Remove Governor From Engine
governor is used on highway vehicle engines where the
same engine powers both the vehicle and auxiliary
1. Disconnect the manual control flexible shaft from
equipment and a high idle speed range is desired during
the governor spring housing.
the auxiliary operation.
2. Remove the governor following the same
procedures outlined in Section 2.7.1.
The current governor is a single-weight type and
provides an idle speed range of 550 to 1800 rpm. The
Disassemble Governor
former governor was a double-weight type and provided
The variable low-speed limiting speed governor is similar
an idle speed range of 450 to 1300 rpm.
to the limiting speed governor with the
The governor is mounted on the front end of the blower
and is driven by the upper blower rotor.
Governor identification is provided by a name plate
attached to the governor housing. The letters V.L.S.L.S.
stamped on the name plate denote a variable low-speed
limiting speed mechanical governor.
Operation
During highway operation the governor functions as a
limiting speed governor, controlling the engine idling
speed and limiting the maximum operating speed. At the
unloading area, the throttle is left in the idle speed
position and the remote control knob is turned to the
speed required within the above range to operate the
auxiliary equipment. The governor then functions as a
variable speed governor, maintaining a constant speed
when the load is continuously changing during the
unloading operation.
Before resuming highway
operation, the remote control knob must be turned all the
way back.
Lubrication
The governor is lubricated in the same manner as the
limiting speed governor (Section 2.7.1).
Check Governor Operation
Governor difficulties should be checked out in the same
manner as outlined in Section 2.7. If, after making the
checks, the governor fails to control the engine or
auxiliary equipment properly, it should be removed and
reconditioned.
Fig. 1 - Governor Spring Housing and Components
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