3-16 ENGINE
CRANKSHAFT
CRANKSHAFT RUNOUT
Support the crankshaft using the V-blocks as shown. Position the
dial gauge, as shown, and rotate the crankshaft slowly to read
the runout.
If the runout exceeds the service limit, correct the runout or re-
place the crankshaft assembly with a new one.
' 09900-21303: V-block (75 mm)
09900-20701: Magnetic stand
09900-20607: Dial gauge (1/100 mm)
% Crankshaft runout
Service Limit: 0.05 mm (0.002 in)
CONROD DEFLECTION
Wear on the big end of the conrod can be estimated by checking
the movement of the small end of the rod. This method can also
check the extent of wear on the parts of the big end of the conrod.
' 09900-21303: V-block (75 mm)
09900-20701: Magnetic stand
09900-20607: Dial gauge (1/100 mm)
% Conrod deflection
Service Limit: 3.0 mm (0.12 in)
If the service limit is exceeded, replace the crankshaft assembly
or bring the deflection into specification by replacing the worn
parts (eg., conrod, big end bearing and crank pin).
1 Bearing (R)
2 Oil seal (R)
3 Crank web (R)
4 Crank web (L)
5 Bearing (L)
6 Oil seal (L)
7 Conrod
8 Conrod bearing
9 Crankpin bearing
0 Crankpin
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