Perkins Phaser Series - To Adjust

20B FUEL SYSTEM
To adjust the fuel injection
pump20B-06
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 (A7). Release the lock nut (A6)
and rotate the adjustment screw clockwise, from
the rear, to increase the speed, or counter-
clockwise to decrease the speed. When the speed
is correct, tighten the lock nut. The setting of the
idle speed can change for different applications.
The correct speed will normally be given in the
manufacturer's handbook for the application. If it is
not given apply to your nearest Perkins/Detroit
Diesel distributor. If further assistance is necessary,
apply to the Technical Service Department of either
Perkins International Limited, Peterborough,
England or Detroit Diesel Corporation, 13400 Outer
Drive West, Detroit, Michigan, U.S.A.
2 With the engine at its normal temperature of
operation, check the maximum no load speed. If
necessary, adjustment can be made by the
adjustment screw (A5).
For early engines: Remove the lead seal (A4) for
access to the lower screw (A3). Release the lower
screw and remove the cover (A2). On the latest
engines the lead seal, screw and cover have been
removed and locking wire fitted to prevent
movement of the adjustment screw for the
maximum no-load speed. Cut the locking wire and
discard the lead seal.
Release the lock nut (A1) and rotate the
adjustment screw clockwise, from the rear, to
increase the speed, or counter-clockwise to
decrease the speed.
When the speed is correct, tighten the lock nut.
For early engines: Fit the cover, fit and tighten the
lower screw. Fit a new lead seal to seal the lower
screw. For the latest engines: Renew the locking
wire and fit a new lead seal.
Caution: The setting for the maximum no load
speed can change for different applications. Always
check the fuel injection pump data plate (B) fitted to
a specific engine, before any adjustment to the
maximum no load speed.
With the engine at its normal temperature of
operation, check the maximum no load speed. The
maximum no load speed is indicated by the last
section of the setting code for the fuel injection
pump. The setting code can be found on the data
plate (B1) on the side of the fuel pump. A typical
setting code is 2643J000WM/1/2860. In this
example, the maximum no load speed is 2860
rev/min.
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High idle reset
PA317
2643J000WM/1/2860
Mfg
The person who fits the pump must ensure that the
adjustment screw is suitably sealed against
interference after it has been set initially. The
adjustment screw on the original fuel pump is set
and sealed by the manufacturer. The setting must
not be changed as this could affect the engine
warranty.
20B.12 Perkins Phaser/1000 Series, April 1995