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TM 10-4320-351-14
6.4.8 Install Governor Assembly and Speed Control.
This task consists of:
a. Installation/Adjustments
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Caliper, Vernier (Appendix B, Section III, Item 3)
Rubber Band, No. 18
Socket, Socket Wrench, 10 mm
(Appendix F, Section II, Item 20)
(Appendix B, Section III, Item 3)
O-Ring (Appendix I, Item 25)
Combination Wrench, 19 mm
Clip, Retaining (Appendix I, Item 9)
(Appendix B, Section III, Item 3)
Handle, Socket Wrench, Ratchet, 3/8" Drive
(Appendix B, Section III, Item 3)
Key, Socket Head Screw, 8 mm
Equipment Condition:
(Appendix B, Section III, Item 3)
Camshaft installed (para. 6.4.7)
Screwdriver, Flat Blade (1/8 x 6 in.)
(Appendix B, Section III, Item 3)
Refer to figure 6-31.
NOTE
·
The adjustments described in the following steps are critical to proper
operation of the engine. Improper adjustment will cause RPM fluctuation, hard
starting and loss of engine power.
·
Installation of the governor assembly and speed control involves shifting the
camshaft in and out of the crankcase to provide access for installation of
governor assembly and speed control.
a.
Using a vernier caliper, adjust governor rod (1) until the distance (A) between governor rod bearing holes is 1.476
in. (36.5 mm) center to center, + 1 turn.
b.
Assemble the two pieces (2 and 3) of the governor assembly (4), using a rubber band to temporarily hold those
two pieces of the governor assembly together. Attach governor rod (1) to governor assembly.
NOTE
For ease of installation of the governor assembly, as necessary, partially remove
the camshaft to gain access during installation of the governor assembly.
c.
Lift the camshaft enough to insert and align the governor assembly in the crankcase. Insert the governor journal
(5) through external crankcase hole (6), through the holes (7) in the governor assembly (4) and into mounting hole
on opposite side of crankcase. Press governor journal (5) into position. Ensure governor is free to move without
binding. Remove rubber band.
d.
Install washer (8) and governor plug (9) over the governor journal (5).
e.
Install O-ring (10) on inside speed control lever (11).
f.
Attach governor spring (12) to inside engine speed control lever (11).
6-50
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