Page 427 - Foton Workshop Manual - Sauvana

ENGINE MECHANICAL - CRANKSHAFT AND FLYWHEEL 12B-137
INSPECTION

1. Check the radial runout of the crankshaft
main journal
(a). Place the crankshaft on theV-shape block.
(b). Measure the radial runout of the crankshaft
main journal with a micrometer.
The maximum radial runout is:0.06mm
• If the radial runout is greater than the
maximum value, the crankshaft should
be replaced. 12B

2. Check the diameter of the crankshaft main
journal
(a). Measure the diameter vertically of each
main journal with the spiral micrometer.
Standard diameter:57.981~58.000mm
• If it does not conform to the standard
value, the oil film clearance should
be checked, and grind or replace the
crankshaft when necessary.
3. Check the ovality of the crankshaft main
journal
(a). The result of the substraction of the
measurement value in the two directions is
the ovality of the main journal.
• If the ovality is greater than the maximum
value, the crankshaft should be replaced.

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