Crankshaft Inspection And Repair - Isuzu NHR 4J Series Workshop Manual

6A – 32 GENERAL ENGINE MECHANICAL
5. Timing Gear Housing
5a.Timing Pulley Housing
6. Oil Pump Assembly
7. Piston Cooling Oil Pipe
8. Piston and Connecting Rod
9. Flywheel
10. Cylinder Block Rear Plate
11. Crankshaft Rear Oil Seal (Gear and Belt Drive Model)
• With the oil seal pushed in deep, install the special tool
as shown in the illustration to remove the oil seal.
Remover: Rear Oil Seal 5-8840-2360-0
NOTE:
Take care not to damage sealing surface of rear plate
and crankshaft when removing oil seal.
12. Main Bearing Cap
13. Crankshaft
6A-32-1.tif
INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is discovered
during inspection.
1. Crankshaft
Thrust clearance
Set the dial indicator as shown in the illustration and
measure the crankshaft thrust clearance.
If the thrust clearance exceeds the specified limit, replace
the thrust bearing as a set.
Thrust clearance
6A-32-2.tif
Standard
0.10 (0.0039)
mm (in)
Limit
0.30 (0.0118)