FLYWHEEL, CRANKSHAFT AND CAMSHAFT
Cleaning
1. Thoroughly clean parts in a non-volatile cleaning solution
or solvent. Follow up with a thorough wash in hot soapy
water.
2. Blow dry with low pressure compressed air.
Inspection
Flywheel
1. Inspect flywheel magnet for cracks, chips, or other
damage. Check magnet for looseness.
2. Check flywheel ring gear (
A
, Figure 128) for worn,
cracked, chipped, or missing teeth.
128
3. Inspect flywheel key for partial or complete shearing.
Replace key if any damage is found. See
Inspection -
Crankshaft
in this section.
4. Inspect flywheel keyway (
B
) for damage or distortion.
5. Inspect flywheel taper (
C
) for scoring, scratches, cracks,
or burrs. Remove any slight burrs with a fine-tooth file.
6. Inspect flywheel fan (
D
) for bent, cracked, chipped, or
broken fins.
Crankshaft
1. Carefully remove crankshaft end play shims (
A
, Figure
129), if present. Count shims as they are removed to be
sure of installing the correct number when the engine
is assembled. Inspect shims for tears, holes, or other
damage. Replace shims as necessary.
129
2. Inspect keyway (
B
) for damage or distortion.
3. Check camshaft gear (
C
) for worn, cracked, chipped, or
missing teeth.
4. Inspect crankshaft for straightness.
DO NOT
attempt to
straighten bent crankshafts.
5. Inspect crankshaft taper for burrs, rust or other damage.
Remove any slight burrs with a fine-tooth file.
6. Inspect crankshaft PTO bearing journal (
D
), crankpin
journal (
E
), and MAG bearing journal (
F
) for scoring.
7. Using an outside micrometer, measure the crankpin
journal diameter. Replace the crankshaft if measurement
is
1.691 in
(42.95 mm) or less.
8. Measure the MAG bearing and PTO bearing journal
diameters. Replace the crankshaft if either measurement
is
1.769 in
(44.926 mm) or less.
104
Summary of Contents for BIG BLOCK M540000
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