Removing The Crankshaft And Balancer Shaft; Checking The Crankshaft - Yamaha FZ09E Service Manual

CRANKSHAFT AND BALANCER SHAFT
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REMOVING THE CRANKSHAFT AND
BALANCER SHAFT
1. Remove:
• Balancer shaft
"1"
• Balancer shaft journal bearings
• Crankshaft assembly
"2"
• Crankshaft jou rnal bearings
TIP ~~~~~~~~~~~~~~~
Identify the position of each balancer shaft jour-
nal bearings and crankshaft journal bearings so
that it can be reinstalled in its original place.
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CHECKING THE OIL NOZZLES
The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle "1"
Damage/ wear
--t
Replace the oil nozzle.
• Oil passage
Obstruction
--t
Blow out with compressed air.
1
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CHECKING THE CRANKSHAFT
1. Measure:
• Crankshaft runout
Out of specification
--t
Replace the crank-
shaft.
Runout limit
0.030 mm (0.0012 in)
5-71
2.
Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear
--t
Replace the crankshaft.
3.
Measure:
• C rankshaft-journal-to-crankshaft-jou r-
nal-bearing clearance
Out of specification
--t
Replace the crank-
shaft journal bearings.
ECA.13920
NOTICE
Journal oil clearance
0.014-0.038 mm (0.0006-0.0015
In)
Do not interchange the crankshaft journal
bearings. To obtain the correct crank-
shaft-journal-to-crankshaft-journal-bearing
clearance and prevent engine damage, the
crankshaft journal bearings must be in-
stalled in their original positions.
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a. Clean the crankshaft journal bearings, crank-
shaft journals, and bearing portions of the
crankcase.
b. Place the upper crankcase upside down on a
bench.
c . Install the crankshaft journal upper bearings
"1"
and the crankshaft into the upper crank-
case.
TIP ~~~~~~~~~~~~~~~
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the up-
per crankcase.