4-66
ENG
CRANKCASE
NOTE:
NOTE:
EAS00399
CHECKING THE CRANKCASE
1. Throughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces and
crankcase mating surfaces.
3. Check:
crankcase
Cracks/damage Replace.
oil delivery passages
Obstruction Blow out with compressed air.
EAS00412
ASSEMBLING THE CRANKCASE
1. Lubricate:
crankshaft journal bearings
(with the recommended lubricant)
Recommended lubricant
Engine oil
2. Apply:
sealant
(onto the crankcase mating surfaces)
Yamaha bond No. 1215
90890-85505
Do not allow any sealant to come into contact
with the oil gallery or crankshaft journal bear-
ings. Do not apply sealant to within 2 X 3 mm of
the crankshaft journal bearings.
3. Install:
dowel pin
4. Install:
crankshaft journal lower bearings
(into the lower crankcase)
Align the projections a on the crankshaft jour-
nal lower bearings with the notches b in the
crankcase.
Install each crankshaft journal lower bearing in
its original place.