Figure 10-7. Checking Camshaft End Play

TM 10-3930-644-14&P

Figure 10-8. Timing Gears Assembled According to

Timing Marks

Figure 10-7. Checking Camshaft End Play

5. If the crankshaft gear requires replacement then

a suitable puller will be necessary as this gear is

shrink fitted on the shaft.

6. Use a driving sleeve to tap the gear snugly into

place.

Hard driving is not necessary and

indicates that the gear is cocked on the shaft.

Figure 10-9. Checking Gear Fit

7. Drive the crank gear on the shaft making sure

that the marked teeth on the cam gear straddle

should be between the .002" and .006" limits.

the marked tooth on the crank gear (Figure 10-8)

which assures that the crankshaft and camshaft

are in time.

8. To be certain that there is enough clearance,

hold finger at the Junction of the two gears and,

with a light hammer, tap the rim of the cam gear

and note if there is vibration felt at this point

(Figure 10-9).

9. If there is vibration and a .0015" feeler gauge will

not enter the gap between the two gear teeth,

the gear fit is within specifications.

Figure 10-10. Flanged Bearing Controls Crankshaft End

Play.

10. Check the crankshaft end play before replacing

the gear cover.

12. When installing the timing gear cover, the seal

should be replaced. Always replace the gasket

11. Crankshaft thrust is controlled by flanged center

between the cover and the engine.

bearings (Figure 10-10) which require no shims.

If end play exceeds .006" (using a feeler gauge)

13. Refer to TOPIC 18 or 19 and install the governor

replace the flanged bearings. End play.

and gear cover

R-104-1

3-37