MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
456
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 9-3-5 Measuring the clearance between
the impeller shaft and the bearing
Fig 9-3-6 Checking the turbocharger
5. Checking the clearance between the
impeller shaft and the bearing
Measure the clearance between the impeller shaft and
the bearing by the dial indicator. See Fig. 9-3-5.
Bearing clearance of the impeller shaft
Standard value
Limit value
Limit value
0.215mm
6. Checking the radial clearance of the rotor
During the inspection, press the gas compressor
impeller radially and measure the minimal clearance
between the gas compressor impeller and the housing
by thickness gauge.
Minimal clearance
No less than
0.10mm
If the clearance is below the value, replace the floating
bearing.
Prompt:
Before figuring out or excluding the causes of
turbocharger damages, do not adopt a new one.
Oil return port
Oil supply port
