DAF CF65, Service Manual

Page: 133 / 352

©
200416 3-1
Inspection and adjustment
CE ENGINE INLET/EXHAUST SYSTEM
ΧΦ65/75/85
series
4
3
3. INSPECTION AND ADJUSTMENT
3.1 INSPECTING TURBOCHARGER WASTEGATE
Note:
Depending on the fitting position of the
turbocharger, it may be necessary to remove the
turbocharger from the engine before this
adjustment; see "Removal and installation".
Note:
The turbocharger is calibrated in the factory and
must not be re-adjusted. The length of the control
rod on the wastegate valve lever may only be
changed when assembling a new turbocharger.
After that, only an inspection of the actuating
pressure of the wastegate may be carried out. If
the result is negative, the turbocharger must be
replaced.
1. Remove the flexible pipe (2) from the
diaphragm box (1) of the wastegate.
2. Connect an air-pressure reducer valve to the
diaphragm box of the wastegate. Set the
reducer valve to max. 0.2 bar gauge
pressure. Connect the reducer valve to a
compressed air installation.
3. Set the reducer valve to exactly the same
test pressure as listed in "Technical data".
4. Check the diaphragm in the diaphragm box
for leaks by listening carefully for a hissing
sound from the diaphragm box.
5. Check whether the control rod of the
wastegate has moved. If it has not moved,
the control rod must be loosened from the
lever. Check again whether the control rod
has moved. If is has not moved, the
diaphragm box must be replaced. If it has
moved, the wastegate valve must be made
to move freely or, if that does not help
sufficiently, the entire compressor unit must
be replaced.
6. Remove the flexible pipe with the reducer
valve and re-connect the flexible pipe of the
compressor pump to the wastegate
diaphragm box.
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i400510
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