INSPECTION / REPAIR

B-58prose procedure

CRANKSHAFT

Crankshaft inspection

1
Check the journals and pins for damage, scoring, and oil hole clogging.
2
Set the crankshaft on V-blocks.
3
Measure the crankshaft runout at the center journal. Replace the crankshaft if necessary.
05U0BX-163

Specification	Value
Runoutmax.	0.04 mm (0.0016 in) max.mm

Runoutmax.

0.04 mm (0.0016 in) max.mm

Journal diameter measurement

4
Measure each journal diameter in X and Y directions at two points.
05U0BX-164

Specification	Value
Main journal — Diameterstandard	49.938—49.956 mm (1.9661—1.9668 in)mm
Main journal — Out-of-roundmax.	0.05 mm (0.0020 in) max.mm
Crankpin journal — Diameterstandard	44.940—44.956 mm (1.7693—1.7699 in)mm
Crankpin journal — Out-of-roundmax.	0.05 mm (0.0020 in) max.mm

Main journal — Diameterstandard

49.938—49.956 mm (1.9661—1.9668 in)mm

Main journal — Out-of-roundmax.

0.05 mm (0.0020 in) max.mm

Crankpin journal — Diameterstandard

44.940—44.956 mm (1.7693—1.7699 in)mm

Crankpin journal — Out-of-roundmax.

0.05 mm (0.0020 in) max.mm

CAUTION

Do not remove the fillet roll area R when grinding.

Undersize bearing selection

5
If the diameter is less than the minimum, grind the journals to match an undersize bearing.
05U0BX-166

Specification	Value
Undersize bearingavailable sizes	0.25 mm (0.010 in), 0.50 mm (0.020 in), 0.75 mm (0.030 in)mm

Undersize bearingavailable sizes

0.25 mm (0.010 in), 0.50 mm (0.020 in), 0.75 mm (0.030 in)mm

Main journal diameter undersize

Bearing size	Journal diameter mm (in)
0.25 (0.010) undersize	49.704—49.708 (1.9568—1.9570)
0.50 (0.020) undersize	49.454—49.458 (1.9470—1.9472)
0.75 (0.030) undersize	49.204—49.208 (1.9372—1.9373)

0.25 (0.010) undersize

Journal diameter mm (in)49.704—49.708 (1.9568—1.9570)

0.50 (0.020) undersize

Journal diameter mm (in)49.454—49.458 (1.9470—1.9472)

0.75 (0.030) undersize

Journal diameter mm (in)49.204—49.208 (1.9372—1.9373)

Crankpin journal diameter undersize

Bearing size	Journal diameter mm (in)
0.25 (0.010) undersize	44.690—44.706 (1.7594—1.7601)
0.50 (0.020) undersize	44.440—44.456 (1.7496—1.7502)
0.75 (0.030) undersize	44.190—44.206 (1.7398—1.7404)

0.25 (0.010) undersize

Journal diameter mm (in)44.690—44.706 (1.7594—1.7601)

0.50 (0.020) undersize

Journal diameter mm (in)44.440—44.456 (1.7496—1.7502)

0.75 (0.030) undersize

Journal diameter mm (in)44.190—44.206 (1.7398—1.7404)

BEARING

Main Bearing and Connecting Rod Bearing

Bearing inspection

1
Check the main bearings and the connecting rod bearings for peeling, scoring, and other damage.
05U0BX-167

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