Yamaha YW50P Service Manual page 107

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C R A N K C A S E ( R I G H T ) R E M O V A L
1. Remove:
• Oil seal s t o p p e r (~
• Screws ( c r a n k c a s e ~ 19Nm(0.9
m.kg,6.5ft.lb !
NOTE:
Loosen each s c r e w 1/4turn, and remove t h e m
after all are loosened.
2. Attach:
• Crankcase separating tool (~
I < ~ l CrankcaSeyu_01135se pa rating tool: I
NOTE:
Fully tighten the tool holding bolts, but make
sure the tool b o d y is parallel w i t h the case. If
n e c e s s a r y , o n e s c r e w m a y be b a c k e d o u t
slightly to level tool body.
.
Remove
• Crankcase (right)
As pressure is applied, alternately tap
on the engine m o u n t i n g bosses.
4-35
C H E C K I N G THE C R A N K C A S E
1. T h o r o u g h l y w a s h the crankcase halves in
a mild solvent.
2. T h o r o u g h l y clean all the gasket surfaces
and crankcase mating surfaces.
3. Check:
• crankcase
Cracks/damage --> Replace.
• oil delivery passages
O b s t r u c t i o n --> B l o w o u t w i t h c o m -
pressed air.
C H E C K I N G THE B E A R I N G S A N D OIL SEALS
1. Check:
• bearings
Clean and lubricate the bearings, then
rotate the inner race w i t h y o u r finger.
Rough m o v e m e n t --> Replace.
2. Check:
• oil seals
D a m a g e / w e a r ~ Replace.