ENGINE
3.54
CRANKCASE BEARING INSPECTION
1. Remove the seal from the PTO side crankcase.
2. Inspect the crankshaft main bearings, balancer
shaft bearings, and pump shaft bearing.
NOTE: Duetoextremelyclosetolerances andminimal
wear, the bearings must be inspected visually, and by
feel. Look for signs of discoloration, scoring or galling.
T urn the inner race of each bearing. The bearings
should turn smoothly and quietly. The outer race of
each bearing should fit tightly in thecrankcase. Thein-
nerraceshouldbefirmwithminimal side to sidemove-
ment and no detectable up and down movement.
3. Support thecrankcaseanddrive orpress themain
bearings out of each crankcase.
4. Toremovebalancershaftbearingsandpumpshaft
bearing use a blind hole bearing puller.
NOTE: Bearings are stressed during the removal pro-
cess and should not be re-used!
PUMP SHAFT OIL SEAL/ WATER PUMP MECHANICAL SEAL
REMOVAL (ENGINE DISASSEMBLED)
NOTE:The water pump mechanical seal can be re-
moved without removing the engine. Refer to W ater
Pump Mechanical Seal Installation.
Replacethepumpshaftsealandwaterpumpmechani-
cal seal whenever the crankcase is disassembled.
1. Removethepumpshaft bearingfrom theMagneto
(right hand) side crankcase.
2. Pry out the oil seal, noting the direction of
installation with the spring side facing IN (toward
inside of case).
3. Drive the water pump mechanical seal out of the
crankcase from inside to outside. Note: The new
mechanical seal must be installed after
the
crankcases are assembled, using a special tool.
See Mechanical Seal Installation.
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