Isuzu AA-6HK1T, Workshop Manual

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ENGINE COOLING 6B–7
1. Remove the rear cover from the water pump body.
2. Use a remover to remove the impeller from the water
pump.
3. Use a puller to remove the water pump center.
4. Remove the dust cover and snap ring.
5. Remove the water pump shaft with ball bearings.
•
Use a plastic hammer to lightly tap on the water
pump shaft from the impeller side.
6. Use a bench press to remove the bearing from the
shaft.
7. Remove the seal unit.
Inspection and Repair
Make the necessary adjustments, repairs and part
replacements if excessive wear or damage is
discovered during inspection.
Water pump impeller
1. Check the impeller for corrosion.
Water pump shaft
1. Measure the water pump shaft and center or impeller
interference.
If the measured interference is less than the
specified limit, the pump shaft and / or the center and
impeller must be replaced.
Pump shaft and center interference:
Limit: 0.048 – 0.078 mm (0.0019 – 0.0031 in)
Pump shaft and impeller interference:
Limit: 0.022 – 0.062 mm (0.0009 – 0.0024 in)
030HY00027
030EY00027
030HY00028
030EY00036