Inspection And Repair - Volvo Penta D65A MS Workshop Manual

Group 21 Engine Body
130
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Inspection and Repair

Crankshaft
Crank pin and crank journal diameters
1. Using a micrometer, measure the crank pin(A.)
and crank journal (B.) diameters. If the repair limit
is exceeded, grind them to the next lower size:
-0.25 mm [-0.0098 in.],-0.50 mm [-0.0197 in.],
-0.75 mm [-0.0295 in.], or -1.00 mm [-0.0394 in.].
NOTE! If the –1.00 mm [0.0394 in.] undersize jour-
nals and crank pins exceed the repair limit, replace
the crankshaft.
2. Measure the crank pins and journals to determine
the roundness and cylindricity
Crank pin diameter (A), mm [in]
Nominal value ........... Ø125 [4.92]
Assembly standard ... -0.050– -0.070 [-0.00197– -0.00276]
Repair limit ................ -0.110 [-0.00433]
Crank journal diameter (A), mm [in]
Nominal value ........... Ø170 [6.69]
Assembly standard ... -0.060– -0.080 [-0.00236– -0.00315]
Repair limit ................ -0.110 [-0.00433]
Pin & Journal roundness, mm [in]
Assembly standard ... Dia. diff. 0.01 [0.0004] max.
Repair limit ................ 0.03 [0.0012]
Pin & Journal cylindricity, mm [in]
Assembly standard ... Dia. Diff. 0.02 [0.0008] max.
Repair limit ................ 0.03 [0.0012]
Pin fillet radius mm [in]
Nominal value ........... 7 [0.28]
0 / -0.2
Assembly standard ... 7.0
Journal fillet radius journal, mm [in]
Nominal value ........... 8.5 [0.33]
Assembly standard ... 8.5 0 / -0.2
Pin & Journal hardness
Assembly standard ... Hv>590
0 / -0.008
[0.276 ]
[0.335 0 / -0.008 ]