Perkins New 1000 Series, Workshop Manual, Page: 196 / 290

20
196 Workshop Manual, TPD 1350, issue 3
New 1000 Series
Bosch fuel injection pump
To remove and to fit 20-7
Special tools:
Spanner for flange nut of the Bosch fuel injection
pump PD.239
Timing pin PD.245
General description
Caution: Do not release the nut (A6) from the fuel
injection pump. Illustration (B) shows the nut (B2) 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.
The manufacturer fits the hub (A2) to 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.
To prevent incorrect adjustments to the engine timing
by rotation of the fuel pump, the mounting flange (A5)
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
(A2), 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 (B1).
Note: On the latest engines with belt driven coolant
pumps, four tamper proof fasteners retain the fuel
pump gear. Special tools and personnel with the
correct training are necessary to remove these
fasteners, refer to your nearest Perkins distributor.
Caution: A new fuel injection pump may be supplied
with the pump shaft in the locked position. The drive
shaft of the pump must not be turned without the
spacer (C3) in position under the locking screw (C2)
The fuel injection pump has a locking screw (C2) and
a spacer (C3). The locking screw prevents the
rotation of the drive shaft.
An "O" ring (C1) is fitted into a groove in the pump
flange. This "O" ring is fitted instead of a joint between
the pump flange and the timing case.
Continued
B
A0374
1
2
A
PW000
1
2
6
5
4
3
1
2
3
A 0 25 6
C
Purchased from www.WorkshopManuals.co.uk