Operation 9-4 To Remove And To Fit The Actuator Assembly Of The Waste-Gate Unit - Perkins New 1000 Series Workshop Manual

9
New 1000 Series
To remove and to fit the actuator assembly of the waste-gate unit Operation 9-4
It is important that the waste-gate actuator setting is not altered. Do not remove the actuator or mounting
bracket unless it is necessary to renew the actuator assembly.
If a waste-gate actuator or mounting bracket assembly is removed from a turbine or compressor housing it is
important that the bracket is fitted into the correct position on the housing.
To remove
1 Disconnect the boost sensor pipe (A1) at the actuator (A2).
2 Remove the clip (A4) which retains the actuator rod (A3) and lift the end of the actuator rod off the pin (A5)
of the waste-gate valve.
3 Release the setscrews which retain the actuator bracket to the turbocharger and remove the actuator and
bracket assembly.
To fit
1 Put the actuator and bracket assembly in position on the turbocharger and tighten the setscrews.
2 Connect to the actuator (A2) an air supply which can be adjusted accurately and is fitted with an accurate
gauge.
3 Operate the arm (A6) of the waste-gate valve by hand to check that the valve is free to move.
4 Push the arm of the waste-gate valve as far as possible toward the actuator and hold the arm in this position.
Slowly apply air pressure to the actuator until the end of the actuator rod (A3) will fit easily onto the pin (A5) of
the waste-gate valve. Fit the clip (A4). Release the air pressure.
2 2
Caution: Do not apply an air pressure of more than 205 kPa (30 lbf/in ) 2,1 kgf/cm to the actuator. Higher
pressures may damage the actuator.
5 Check the operation of the waste-gate unit, see Operation 9-5.
4 5
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3
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Workshop Manual, TPD 1350E, Issue 4 177
This document has been printed from SPI². Not for Resale