Perkins 900 Series Workshop Manual page 195

900 Series
To adjust
Caution: If the idle speed adjustment screw or the maximum no-load speed adjustment screw are sealed with
locking wire (A1) or a plastic tamper proof cap (B1), then the adjustment must be reset by personnel authorised
by Perkins Engines Company Limited.
1 Operate the engine until it reaches its normal temperature of operation and check the idle speed. If
necessary, adjustment can be made by the adjustment screw (A3).
2 Release the lock nut and rotate the adjustment screw clockwise to increase the speed or counter-clockwise
to decrease the speed. When the speed is correct, tighten the lock nut. Normally the correct speed is given in
the manufacturer's handbook for the application. If it is not given, apply to your nearest Perkins distributor, or
to Technical Services Department, Perkins Engines Company Limited, Peterborough, England.
1
2
3
A
Caution: The setting for the maximum no-load speed can change for different applications. Always check the
fuel injection pump data plate (C) before an adjustment is made to the maximum no-load speed.
3 With the engine at its normal temperature of operation, check the maximum no-load speed.
4 The maximum no-load speed is indicated by the last part of the setting code for the fuel injection pump. The
setting code can be found on the data plate (C1) on the side of the fuel pump.
A typical setting code is 2644-----AN/2/1890. In this example, the maximum no-load speed is 1890 rev/min. If
necessary, this speed can be adjusted by the adjustment screw (A2).
1
C
Workshop Manual, TPD 1345E, issue 3
This document has been printed from SPI². Not for Resale
1
B
C0079
C0081
11
Operation 11-18
C0079
Continued
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