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Chapter 10 COOLING SYSTEM
2.9.4 Air Cooler Water Pump - Inspect
Measure the bearing fit diameters of water pump bearing housing and shaft, and the inside and outside diameters of bearing. If
any of the measurements is out of the standard, replace the part with a new one.
Item Nominal value Standard value
Inside diameter of bearing fit
Pump case ø62 mm [2.44 in.] 61.988 to 62.018 mm [2.4404 to 2.4416 in.]
Bearing cover ø68 mm ( [2.68 in.] 67.961 to 67.991 mm [2.6760 to 2.6768 in.]
Bearing
Inside diameter ø28 mm [1.1024 in.] 27.990 to 28.000 mm [1.1020 to 1.1024 in.]
Outside diameter ø68 mm ( [2.68 in.] 67.987 to 68.000 mm [2.677 to 2.6772 in.]
Outside diameter of shaft fit to bearing ø28 mm [1.1024 in.] 28.002 to 28.015 mm [1.1024 to 1.1034 in.]
Impeller front clearance 0.8 mm [0.031 in.] 0.5 to 1.1 mm [0.020 to 0.043 in.]
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