Crankshaft Inspection

1. Inspect crankshaft for runout:
a. Place the crankshaft on V-blocks.
b. Using a dial indicator SA9179NE (or equivalent), measure the circle runout at the center journal.

Maximum circle runout: 0.050 mm (0.0020 in.) 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 in.)
Service Limit: 56.990 mm (2.2437 in.) min.

Rod Journal Diameter:
Standard: 46.990-47010 mm (1.8500-1.8508 in.)
Service Limit: 46.990 mm (1.850 in.) min.

Main Journal Oil Clearance:
Standard: 0.006-0.050 mm (0.0002-0.002 in.)
Service Limit: 0.060 mm (0.0024 in.) max.

Rod Journal Oil Clearance:
Standard: 0.003-0.053 mm (0.0001-0.0021 in.)
Service Limit: 0.063 mm (0.0025 in.) max.

IMPORTANT: (0.012 mm [0.0005 in.] and 0.025 mm [0.001 in.]) 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 in.) max.
Service Limit: Out-of-Round: 0.010 mm (0.0004 in.) 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 in.). Journals must be fitted with 0.25 mm (0.010 in.) undersized bearings.