Removing The Crankshaft And Balancer Shaft; Checking The Oil Nozzles; Checking The Crankshaft - Yamaha MTN1000 2016 Service Manual

EAS31171
REMOVING THE CRANKSHAFT AND
BALANCER SHAFT
1. Remove:
• Balancer shaft "1"
• Balancer shaft journal bearing
• Crankshaft assembly "2"
• Crankshaft journal 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.
2
EAS31174

CHECKING THE OIL NOZZLES

The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle 1 "1"
• Oil nozzle 2 "2"
Damage/wear  Replace the oil nozzle.
• Oil passage
Obstruction  Blow out with compressed air.
1
EAS31075

CHECKING THE CRANKSHAFT

1. Measure:
• Crankshaft runout
Out of specification  Replace the crank-
shaft.
Runout limit
0.030 mm (0.0012 in)
CRANKSHAFT AND BALANCER SHAFT
2. Check:
3. Measure:
1
ECA13920
NOTICE
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the crank-
shaft journal bearings must be installed in
their original positions.
2
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a. Clean the crankshaft journal bearings, crank-
b. Place the upper crankcase upside down on a
c. Install the crankshaft journal upper bearings
TIP
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the up-
per crankcase.
5-81
• Crankshaft journal surfaces
• Crankshaft pin surfaces
Scratches/wear  Replace the crankshaft.
• Bearing surfaces
Scratches/wear  Replace the crankshaft
journal bearing.
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification  Replace the crank-
shaft journal bearings.
Journal oil clearance
0.027–0.045 mm (0.0011–0.0018
in)
shaft journals, and bearing portions of the
crankcase.
bench.
"1" and the crankshaft into the upper crank-
case.