Briggs & Stratton Vanguard 10V300, Repair Manual

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58
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. See Figure 72. Inspect flywheel magnet ( A ) for
cracks, chips, or other damage. Check magnet for
looseness.
2. Check flywheel ring gear ( B ) for worn, cracked,
chipped, or missing teeth.
3. Inspect flywheel key ( C ) for partial or complete
shearing. Replace key if any damage is found.
4. Inspect flywheel keyway ( D ) for damage or distortion.
5. Inspect flywheel taper for scoring, scratches, cracks,
or burrs. Remove any slight burrs with a fine-tooth
file.
6. Inspect flywheel fan ( E ) for bent, cracked, chipped, or
broken fins.
72
Crankshaft
1. See Figure 73. Carefully remove crankshaft end
play shims ( A ), 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.
2. Inspect keyway ( B ) for damage or distortion.
3. Check camshaft gear ( C ) and governor gear ( D ) 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 ( E ), crankpin
journal ( F ), and MAG bearing journal ( G ) for scoring.
7. Using an outside micrometer, measure the
crankpin journal diameter. Replace the crankshaft if
measurement is 1.099 inches (27.925 mm) or less.
8. Measure the MAG bearing and PTO bearing
journal diameters. Replace the crankshaft if either
measurement is 0.981 inches (24.925 mm) or less.
73
Not for
Reproduction