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Disassembly/Inspection and Service
22 690 01 Rev. -- KohlerEngines.com
Remove Crankshaft
B
A
C
A Crankshaft Gear B Crankshaft
C Key
1. Carefully remove crankshaft from crankcase.
2. Remove crankshaft gear from crankshaft and
carefully remove key from keyway.
Crankshaft and Crankshaft Gear Inspection and
Service
Inspect teeth of crankshaft gear. If teeth are badly worn,
chipped, or some are missing, replacement of crankshaft
gear will be necessary. Remove gear by pulling it off key
and crankshaft.
Inspect crankshaft bearing journal surfaces for wear,
scoring, grooving, etc. If they show signs of damage or
are out of running clearance specifi cations, crankshaft
must be replaced.
Inspect crankshaft keyways. If worn or chipped,
replacement of crankshaft will be necessary.
Inspect crankpin for wear, score marks or aluminum
transfer. Slight score marks can be cleaned with crocus
cloth soaked in oil. If wear limits are exceeded, it will be
necessary to replace crankshaft.
Remove Oil Pump Assembly
C
A
B
A Oil Pump Housing Assembly
B Oil Pump Assembly
C Oil Pump Housing Screws
1. Remove screws and lift oil pump housing assembly
from crankcase.
2. Remove oil pump assembly gerotor gears from
crankcase.
Oil Pump Inspection
Check oil pump and gears for cracks, damage, wear,
and smooth rotation. Replace pump if any binding is
noted or reuse is questionable in any way.
A pressure relief valve is built into oil pump to limit
maximum pressure. It is not serviceable. If a problem
exists with pressure relief valve, oil pump assembly
should be replaced.
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