Perkins 900 Series Workshop Manual page 174

11
The locked pumps (B) have a locking screw (B6) and a spacer (B2). The locking screw prevents the rotation
of the drive shaft after the pump is removed from the engine. This allows the pump to be removed and fitted
without the need to time the pump to the engine.
Caution: Do not try to rotate the drive shaft of the fuel pump when it is locked with the locking screw. If the
drive shaft is rotated, it will be damaged.
Engines with these pumps do not have a timing mark on the timing case, but there is a timing mark (B1) on the
pump flange. If the engine performance indicates that the timing of the fuel pump may be incorrect, the pump
must be removed and the mark on the pump checked, see Operation 8-3.
A new pump will be supplied locked at the correct angle for the engine. It is important that the complete engine
number is given to the distributor when a new pump is needed.
An "O" ring is fitted in the pump flange. This "O" ring is fitted instead of a joint between the pump flange and
the timing case.
The high-pressure outlet for number 1 cylinder is shown at (B4).
2
1
6
B
The pin-timed pump (C) conform to emissions legislation and have tamper proof engine timing and adjustment
screws.
The pump has a hole in the flange through which the pin (C1) is inserted to lock the shaft to the body of the
pump. This pump has a locking screw (C4) that locks the shaft. It is important that the lock screw is released
and the pump shaft is free to turn when the pump is fitted to the engine. An electrically operated cold start
device (C3) which retards the timing for normal operation and a stop solenoid (C2) are fitted. The pump
includes a self-vent feature.
164
This document has been printed from SPI². Not for Resale
3
4
1
5
C
C0074/1
4
3
Workshop Manual, TPD 1345E, issue 3
900 Series
2
A0299B
Continued