ac. Assemble vacuum piston assembly (16) in
ag. Install fuel filter (62), fiber washer (63) and
vacuum cylinder in throttle body. Press retainer into
filter head ((4) in threaded passage in top of throttle
recess of body with flat side of screwdriver. Check for
ah. Hold throttle closed and turn throttle stop
free movement of piston in cylinder
ad. Place throttle body gasket (18) on
screw (11) in until it just contacts stop on throttle body;
machined surface of throttle body.
then turn screw in 11/2 additional turns as a preliminary
ae. Place throttle body on fuel bowl be careful
idle speed adjustment.
ai. Refer to TM 5-3810-294-20 and install the
not to damage floats or vacuum piston assembly.
Aline holes in throttle body and gasket with
carburetor, throttle linkage, and fuel lines on engine.
Adjust carburetor as described in TM 5- 3810-294-20.
holes in fuel bowl and install six screws (4) and
lockwashers (5). Tighten screws uniformly and securely.
Section V. REPAIR OF GOVERNOR
slowing down, and the governor has maintained the
engine at the desired speed, which is represented by the
The governor, in conjunction with the throttle maintains
engine speed in response to changes in load. An
example of a change in engine load occurs when the
crane operator begins to lift a load. At this time, the
Refer to TM 5-3810-294-20 to remove the governor.
speed governor senses a tendency for the engine to slow
down. This automatically causes the governor linkage to
Refer to figure 3-5 and disassemble the governor as
open the carburetor throttle valve, thus allowing more
fuel to enter the engine. The additional fuel prevents the
KEY to FIG. 3-5
2. Governor spring
Governor weight carrier, assembly
3. Stop pin
Drive gear, with shaft
4. Throttle lever
5. Pop screw
6. Bumper spring body
Drive shaft bearing
7. Bumper spring
8. Locating screw
9 Thrust fork
11. Connecting rod
12. Thrust bearing stop ring
13. Thrust bearing
Elbow (at engine )
14. Thrust sleeve
Elbow (at cover)
15. Governor weights
16. Weight pin