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 TM 10-3930-660-24-2
CAMSHAFT, GEAR AND BUSHING MAINTENANCE - CONTINUED
0278 00
DISASSEMBLY
1.
Use a press to push gear (4) from camshaft (3).
2.
Remove key (6) from camshaft.
3.
Use crocus cloth to remove all burrs and smooth any rough surfaces on the camshaft that could have been caused by
gear removal.
3
4
6
4
409-1021
409-1020
CLEANING
See cleaning instructions (WP 0316 00).
INSPECTION
1.
Inspect camshaft bushing and camshaft bores in cylinder block.
2.
Inspect camshaft bushing and camshaft bores for burrs, scoring, grooves and pitting.
3.
Measure front camshaft bushing I.D. Acceptable range is 2.1295 to 2.1314 in. (54.0893 to 54.1375 mm).
NOTE
If intermediate and rear camshaft bores have service bushings installed, the I.D. dimension must be within
the tolerance specified in step 3.
4.
Measure intermediate and rear camshaft bores I.D. Acceptable bore I.D. range is 2.1295 to 2.1314 in. (54.0893 to
54.1375 mm). If bores are worn beyond this specification, the block must be machined and service bushings installed, or
the block must be replaced. Refer to Depot Level Maintenance.
NOTE
If new valve tappets are being installed, the camshaft and camshaft bushing must be replaced.
5.
Inspect camshaft by inspecting fuel lift pump lobe, valve lobes and camshaft bearing journal for cracking, pitting or
other defects.
6.
Measure bearing journal diameter. Minimum allowable diameter is 2.1245 in. (53.9623 mm).
0278 00-3
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