Governor Cup

TM 5-4110-217-14

c. Installation.

Also, use a feeler to check 1/2-inch ball. Replace

missing ball. (Fig. 5-11.)

(1) When installing the governor cup, tilt the

(2) Turn the governor cup so that the plastic

engine so the gear is up. Put the flyballs in place and

lined hole is at the three o'clock position. The smooth

install the cup and snap ring on the center pin.

side of the governor yoke must ride against the governor

(2) The camshaft center pin extends out 3/4

cup.

inch from the end of the camshaft. This distance

(3) Turn the governor arm and shaft clockwise

provides an in out out travel distance of 7/32 inch for the

as far as possible and hold in this position until the gear

governor cup, as illustrated. Hold the cup against the

cover is installed flush against the crankcase.

flyballs when measuring. If the distance is less (the

engine may race, especially at no load), remove the

center pin and press a new pin in only the required

CAUTION

amount. Otherwise, grind off the hub of the cup as

Care must be taken not to damage the

required. The camshaft center pin cannot be pulled

gear cover oil seal

outward or removed without damage. If the center pin

extends out too far, the cup will not hold the flyballs

(4) Reinstall flywheel (para 5-9).

properly.

(3) Reinstall gear cover and flywheel (para 5-9,

5-11. Governor Cup (Fig. 5-12).

5-10).

a. Removal. Remove the gear cover assembly

5-12. Timing Gears (Fig. 5-13).

(para 5-10). The governor cup can be taken off after

removing the snap ring from the cam shaft center pin.

a. General. If replacement of either the crankshaft

Catch the flyballs while sliding the cup off.

gear (153-1, fig. 3-11) or the camshaft gear (153-2, fig.

b. Repair.

3-11) becomes necessary, install both gears new; never

(1) Replace any flyball that is grooved or has

one only. Use a gear pulling ring (420-0248) to remove

a flat spot. If the arms of the ball spacer are worn or

the crankshaft gear. Be sure to remove the lock ring

otherwise damaged, replace the entire timing gear set.

(155) first.

(2) The governor cup must spin freely on the

b. Removal (fig. 3-11).

camshaft center pin without excessive looseness or

(1) Remove flywheel, gear cover and governor

wobble. If the race surface of the cup is grooved or

cup (para. 5-9 thru 5-11).

rough, replace it with a new one.

(2) The camshaft gear (153-2) is pressed on

and keyed to the camshaft (181). The camshaft(181)

and gear (163-2) must be removed as an assembly after

first removing the crankshaft gear lock ring (155) and

washer (156). Before removing the camshaft

Figure 5-13. Timing Gear Removal and Installation

Figure 5-12. Governor Cup (Model RMP-J/1-10G)

(Mode RMP-J/I-1OG)

5-8