Lombardini CHD series - Turbocharger Actuator Adjustment; Checking actuator setting - Waste gate valve control rod stroke adjustment

- 59 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
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Checking actuator setting - "Waste gate" valve control rod
stroke adjustment
Important
This test must be done with the engine stationary.
Disconnect pipe 7 from the compressor side.
Using a T coupling, connect up with a pressure gauge 4 (scale
from zero to 2 bar) and with the compressed air mains pipe
complete with reduction unit 5.
The mains air pressure must be 1.5÷2.0 bar.
Make a hole B diameter 1.5 mm in the pressure gauge pipe
where part of the air will escape which has the purpose of
stabilizing the pressure in the pressure gauge.
Use the reduction unit 5 to send air to the actuator so as to
make terminal 2 of A move forward (A = 1 mm).
Position a comparator 6 so that the feeler rests on the terminal
2.
The pressure read on the pressure gauge must be 830÷890 mm
Hg (1.11÷1.19 bar).
If the pressure is lower than the given value, proceed as follows:
- Unscrew the lock nut 1.
- Remove the split pin 9 and disconnect the rod 8.
- Keeping the rod stationary, screw the terminal 2 to reach the
setting pressure.
While the terminal is rotating the rod must undergo no twisting.
Notes :