Chapter IX Turbocharging System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
455
Fig. 9-3-2 Checking the working condition of
the turbocharger
Fig. 9-3-3 Measuring the axial clearance of
the impeller shaft
Fig. 9-3-4 Checking the turbocharger
2. Checking the working condition of the
turbocharger
Check whether the pressure for moving the control rod
for 2 mm is within the following limit value.
Working pressure of the control rod
About 0.118Mpa
For the turbocharger maintenance, please contact with
the ―Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited‖ service station.
The following standard value and limit value for the
important axial clearance and bearing clearance of the
impeller shafts are for reference only.
3. Checking the axial clearance of the
impeller shaft.
Measure the axial clearance of the impeller by dial
indicator. See Fig. 9-3-3.Apply a 0.12N force on the gas
compressor impeller and
the
turbine
impeller
alternately.
Axial clearance of the impeller shaft
Standard value
Limit value
0.06 ~ 0.09mm
0.11 mm
4. Checking the axial clearance of the rotor
During the inspection, fix the magnetic base on the
turbine housing outlet flange surface to connect the dial
indicator to the turbine rotor shaft end face, and then
push or pull the turbine rotor axially. The measured
difference value is the axial clearance value.
Rotor of the new turbocharger
Axial clearance
0.01 mm
Operation limit
≤0.25mm
When the axial clearance of the turbocharger rotor
exceeds the operation limit, please disassemble the
assembly and replace the wearing parts.
