TURBOCHARGER
BY Service Manual
9-7
Tests and Adjustments
TESTS AND ADJUSTMENTS
Measuring Charge Pressure
The turbocharger charge pressure can be
measured using console digital display.
Low charge pressure can be due to compressor
wheel or turbine wheel damage, control rod wear,
or dirt in the compressor housing.
Figure 9-1
1. Remove charge air temperature sensor
(Figure 9-1, (1)) from charge air intake pipe.
2. Install an M12x1.5 adapter and connect a
mechanical gauge to the charge air
temperature sensor port.
3. Operate the engine under normal load
conditions at WOT (4000 rpm) and take a
reading after at least 30 seconds of constant
operation.
Results:
If the reading is not within specification, adjust the
control rod (4BY) or replace the turbocharger. See
Adjusting Charge Pressure - 4BY on page 9-8.
Specifications
(
1
)
0003769B
Inspection Item Engine Limit
Turbocharger
Boost Pressure
4BY150
Minimum
1600 mbar
(23.2 psi)
Maximum
1750 mbar
(25.4 psi)
4BY180
Minimum
1650 mbar
(23.9 psi)
Maximum
1800 mbar
(26.1 psi)
6BY220
Minimum
1900 mbar
(27.6 psi)
Maximum
2020 mbar
(29.3 psi)
6BY260
Minimum
2000 mbar
(29.0 psi)
Maximum
2120 mbar
(30.7 psi)
To Next Page
General
