Checking The Crankshaft And Connecting Rods - Yamaha 2002 TDM900 Service Manual

CRANKSHAFT
EAS00395
CHECKING THE CRANKSHAFT AND
CONNECTING RODS
1. Measure:
S crankshaft runout
Out of specification ! Replace the crank-
shaft.
Crankshaft runout
Less than 0.03 mm
2. Check:
S crankshaft journal surfaces
S crankshaft pin surfaces
S bearing surfaces
Scratches/wear ! Replace the crankshaft.
3. Measure:
S crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification ! Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance
0.020 X 0.038 mm
CAUTION:
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.
a. Clean the crankshaft journal bearings,
crankshaft 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.
NOTE:
Align the projections a on the crankshaft jour-
nal upper bearings with the notches b in the up-
per crankcase.
d. Put a piece of Plastigauge
crankshaft journal.
5-75
ENG

c on each