TM-9-2815-205-34

ENGINE WITH CONTAINER; MODELS 5063-5299, 5063-5392, 5063-5393, 5063-5395, 5063-5398, 5063-539F, 5063-539L

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

AUGUST 1992

TM-9-2815-205-34 - Page 297 of 596

TM 9-2815-205-34

3-48. CAMSHAFTS, CAMSHAFT GEARS, AND IDLER GEAR REPLACEMENT (Cont)

d. Inspection

(1)

(2)

(3)

(4)

(5)

Check camshaft keyways and threads for

damage.

Inspect camshaft journals and lobes for

wear and scoring. Check wear of

camshaft lobes as follows:

(a) Measure flat on cam lobes (31) with

thickness gages (32) and straight

edge (33).

(b) Replace camshaft if flats are worn

more than 0.003 inch.

Using dial indicator (34), measure runout

of intermediate camshaft journals (35)

with end journals mounted on V-blocks.

Replace camshaft if runout exceeds

0.002 inch.

Examine faces of thrust washers for

scoring and wear. New thrust washers

are 0.208 to 0.210 inch thick.

Examine surfaces which thrust washers

contact. Smooth scratched or scored

surfaces with oil stone.

NOT E

•

Camshaft bearings are available in 0.010 and 0.020 inch undersize on inside diameter.

•

If camshaft bearings require replacement, see Cylinder Block Maintenance (Para 3-54

(6)

(7)

(8)

(9)

(10)

or

3-55).

Using micrometer and telescoping gages, measure outside diameter of camshaft journals and

inside diameter of camshaft bearings. Clearance between journals and bearings should be

0.0035-0.007 inch with new parts and a maximum of 0.008 inch with used parts.

Examine teeth on gears for scoring, pitting, and wear.

Inspect idler gear bearing for scoring, pitting, and wear.

Examine gear hub and thrust washers for scoring and wear.

Inspect tachometer drive shaft for distortion or other damage. If damage, discard.

3-168