8. Crankshaft Inspection

- Tools Required
- SA9179NE Dial Indicator





1. Inspect crankshaft for runout:
a. Place the crankshaft on V-blocks.
b. Using a dial indicator SA 9179NE (or equivalent), measure the circle runout at the center journal.
Maximum circle runout: 0.050 mm (0.0020 inch) max.
If the circle runout is greater than maximum, replace the crankshaft.





c. Using a micrometer, measure the diameter of each main journal and crank pin.
Main Journal Diameter:
Standard: 56.993 - 57.007 mm (2.2438 - 2.2444 inch)
Service Limit: 56.990 mm (2.2437 inch) min.
Rod Journal Diameter:
Standard: 46.990 - 47010 mm (1.8500 - 1.8508 inch)
Service Limit: 46.990 mm (1.850 inch) min.
Main Journal Oil Clearance:
Standard: 0.006 - 0.050 mm (0.0002 - 0.002 inch)
Service Limit: 0.060 mm (0.0024 inch) max.
Rod Journal Oil Clearance:
Standard: 0.003 - 0.053 mm (0.0001 - 0.0021 inch)
Service Limit: 0.063 mm (0.0025 inch) max.

IMPORTANT: 0.012 mm [0.0005 inch] and 0.025 mm [0.001 inch]) undersized main and thrust bearings are available to adjust for correct main journal oil clearance.





d. Check each main journal and crank pin for taper (A-B) and out-of-round (X-Y) as shown.
Service Limit: Taper: 0.010 mm (0.0004 inch) max.
Service Limit: Out-of-Round: 0.010 mm (0.0004 inch) max.

IMPORTANT: If taper and out-of-round are greater than maximum, grind or replace the crankshaft. Crankshaft journals can be ground to a maximum of 0.25 mm (0.010 inch). Journals must be fitted with 0.25 mm (0.010 inch) undersized bearings.