APU GOVERNOR -706881075

TM 5-4210-233-14&P-1

5-79. APU GOVERNOR

This task covers:

a. Removal

d. Adjustment

b. Inspection/Repair

e. Follow-on Maintenance

c. Installation

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

APU Removed (see para 4-207.)

(Appendix B, Section III, Item 1)

Gear Cover Removed (see 5-68.)

MATERIALS/PARTS REQUIRED

Grease (Item 53, Appendix E)

a. Removal.

(1)

Remove snap ring (1) from camshaft center pin (2) and

slide cup (3) off. Remove twin governor fly balls (4).

NOTE

Be sure to catch the

ten fly balls that will

fall when the cup is

removed,

b. Inspection/Repair.

(1)

Replace any fly balls that have flat spots or grooves;

Replace the cup if the race surface is grooved or rough.

The governor cup must be a free spinning fit on the

camshaft center pin, but should be replaced if

excessively loose or wobbly.

(2)

Check the distance the center pin extends from the

camshaft gear; this distance must be 25/32 in. (20 mm)

to give the proper travel distance for the cup. If it is less,

the engine may race; if more, the cup will not hold the

balls properly. If the distance is too great, drive or press

the center pin in. If it too small, replace the pin; it cannot

be removed without damaging its surface.

NOTE

In some cases, if the distance is too small, the head of the

governor cup can be ground to give the necessary 25/32 in. (20

mm) extension.

Installation.

(1)

Tip the front of the unit upward, set the fly balls (4) in their recesses.

(2)

Position governor cup (3) on center pin (2).

(3)

Brush governor ball area with heavy grease (Item 53, Appendix E) and install snap ring (1) on the

center pin (2).

5-404