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 TM 55-1905-220-14-6
3-142. GOVERNOR AND BREATHER TUBE - MAINTENANCE INSTRUCTIONS.
a. General
(1) The variable speed mechanical governor performs three
functions:
(a)
Controls the engine idle speed.
(b)
Limits the maximum no-load speed.
(c)
Holds the engine at any constant speed, between idle and
maximum, as desired by the operator.
(2) The single weight governor is mounted on the front of the
blower and is driven by the upper blower rotor.
(3) The governor consists of four sub-assemblies:
(a)
Control Housing Cover.
(b)
Control Housing.
(c)
Weight and Housing.
(d)
Variable Speed Spring Housing and Shaft.
b. Operation
(1) The manual controls are provided on the variable speed
governor: a stop lever for starting and stopping, and a speed control
lever. For starting, the stop lever is moved to the RUN position,
which holds the injector control racks near the full fuel position.
Upon starting, the governor moves the injector racks toward the idle
speed position. The engine speed is then controlled manually by
moving the speed control lever.
(2) A fuel rod, connected to the differential lever and injector
control tube lever, provides a means for the governor to change the
fuel settings of the injector control racks.
(3) Adjustment of the engine idle speed is accomplished by
changing the tension on the variable speed spring by means of the idle
speed adjusting screw.
c. Lubrication
Surplus oil returning from the cylinder head provides lubrication
for the parts in the governor control housing, the riser thrust bear-
ings, and the weight shaft end bearing.. Oil, picked up from a reser-
voir in the blower front end plate by a slinger attached to the lower
rotor shaft, provides lubrication for the governor weights and weight
carrier.
3-2400
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