TM 5-4320-300-14
5-13.
FUEL CONTROL TUBE ASSEMBLY (CONT)
Location/Item
Action
Remarks
21. Stop lever
22. Speed control lever
Put in run position.
Put in idle position.
NOTE
If adjustments to the governor are made while the pump is under load (pumping water), erroneous
tachometer readings will result. To accurately set the idle and no load speed, the pump should be
separated from the engine.
23. Pump
Separate from engine at flexible coupling in
accordance with paragraph 5-20.
24. Idle speed
Start engine. Loosen jam nut and turn in or out
adjusting
until engine idles at 550 rpm. Hold screw tight
screw
and tighten jam nut. Leave engine running.
25. Speed con-
Move it to the maximum speed position.
trol lever
26. Maximum
Loosen jam nut and adjust until 2300 rpm is
speed adjust-
obtained. Hold screw tight and tighten jam nut.
ing screw
Leave engine running.
CAUTION
Equipment damage may occur if idle speed is raised more than 20 rpm with buffer screw. After
adjusting, also check maximum no load speed to make sure that it has not increased over 20 rpm
by buffer screw adjustment.
27. Buffer screw
Reduce engine speed to 550 rpm and turn screw
so that it contacts the stop lever very lightly, and
still eliminates engine roll.
5-45
