General Description - Perkins 900 Series Workshop Manual

11
900 Series
Stanadyne fuel injection pump

General description

Caution: Do not release the nut (A2) from the fuel injection pump. Illustration (A) shows the nut in position
when the fuel pump is fitted to the engine. The fuel pump hub is fitted to the shaft in the factory to ensure that
the fuel pump is in the correct position for timing. If the nut is removed and the hub moves, the hub will need
to be accurately fitted to the pump by use of specialist equipment before the pump can be fitted to the engine.
Note: If your engine has an emisssions label, the pump will be supplied at a preset engine speed.
The manufacturer fits the hub (B2) to the drive shaft of the pump to ensure very accurate timing. Engines that
have this arrangement have the drive gear fastened to the hub instead of to the shaft of the pump. The rubber
seal (B1) has a square cross-section, if it is damage it must be replaced.
To prevent adjustment to the engine timing, by rotation of the fuel pump, the mounting flange has holes instead
of slots.
Accurate timing of the pump to the engine is by a pin (A1) used to align the fuel pump gear and the hub (A4),
with a hole in the body (A3) of the fuel pump. The gear is passed over the pin and fastened to the hub with four
fasteners (A6).
Note: On the latest engines, the fuel pump gear is now retained by one torx screw (A6) and three Allen screws
(A7). The torque for all four fasteners is 27 Nm (20 lbf ft) 2,8 kgf m. A special tool to remove the torx screw is
available at your Perkins distributor.
7
1
1
2
6
5
2
4 3
B
A
A0163
A0374A
Workshop Manual, TPD 1345E, issue 3 189
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