Governor. - TM-5-4320-248-150101

5.2.2.13

Governor.

5.2.2.13.1

Mechanical Governor.

The purpose of the governor is to automatically maintain a de-

sired engine speed while under a fluctuating work load. Centri-

fugal force created by the spinning fly-weights actuates a

series of mechanical linkages and tends to close the carburetor

throttle. The governor spring counteracts the fly-weight action

and tends to open the throttle. The engine speed at which these

two forces balance is referred to as the governed speed.

5.2.2.13.2

Inspection and Adjustment of Mechanical Governor.

The governor

controlled mechanical linkage must be in alignment

and operate

freely throughout its entire travel. Check for

clearance of

all linkages in governor control train. It maybe

necessary to

slightly bend rods or levers to achieve bind free

movement.

The engine speed setting is controlled by the knurled nut

threaded on top of the control rod. To increase engine speed,

turn speed adjustment nut counterclockwise. To reduce engine

speed, turn speed adjustment nut clockwise. If desired engine

speed within the prescribed limits cannot be obtained by adjust-

ment of the knurled nut, check spring hooked in governor lever

to determine if it is stretched, distorted or fatigued. Replace

with a new spring if defective, and adjust for correct engine

speed.

NOTE : SPRING LOOP SHOULD BE HOOKED IN NO. 4 HOLE OF GOVERNOR

LEVER. FOR CLOSER GOVERNING, MOVE SPRING LOOP TO NO. 3, 2, OR

1 HOLES IN GOVERNOR LEVER.