Fuel Injection Pump; To Refit The Fuel Lift Pump; To Remove The Fuel Injection Pump - Perkins 4.108 Workshop Manual

the valve in the outlet port fitted in the reverse
position.
3. Press the valves home with a suitable piece of
tubing. approximately 9/16 in (14,29 mm) inside
diameter and {f in (19,05 mm) outside diameter.
4. Stake the casting in six places (between the
original stakings) round each valve, with a suitable
punch.
NOTE: Valves fitted to earlier lift pumps were
held in position with a retaining plate and two
screws. On no account should attempts be made
to stake the valves of this earlier type pump.
5. Place the rocker arm retaining pin in the appro-
priate hole in the lower casting and push through
until it protrudes slightly inside.
6. Fit one packing washer and the link into the casting
moving the pin in slightly to retain them.
7. Fit the rocker arm and return spring and retain by
moving the pin in further, ensuring that the spring
seats correctly.
8. Fit the remaining packing washer, then push the
rocker arm retaining pin through the link, washer
and casting until the ends protrude equally beyond
the outside of the casting.
9. Retain by securing with the two clips.
10. Insert the new rubber sealing washer followed by
the steel seating washer and diaphragm return
spring.
11. Place the diaphragm assembly over the spring
with the pull rod downwards, locating the top of
the spring in the diaphragm protector washer.
12. Now position the pull rod so that the flat notched
blade has one of its thin edges facing the rocker
arm. Press downwards on the diaphragm assembly
and twist it through 90" in either direction, this
action will engage and retain the pull rod in the
fork of the link.
13. Operate the rocker arm against the diaphragm
spring pressure until the diaphragm is level with
the body flange.
14. Place the cover assembly in position and line up the
file marks made on the flanges prior to dismantling.
15. Still holding the diaphragm level with the body
flanges, fit the five flange securing screws, tighten
evenly and securely.
To Refit the Fuel lift Pump
1.
Fit the distance piece using a joint on either side.
2. Enter the pump operating lever into the recess in
the tappet inspection cover as shown on Fig. N.9
and secure with the two nuts and washers.
3. Reconnect the low pressure fuel pipes to the inlet
and outlet ports.
AIR CLEANERS AND FUEL SYSTEM-N.S
N9
FUEL INJECTION PUMP
Description
The fuel injection pump is of the D.P.A. distributor
type. It is a precision built unit incorporating a simple
hydraulic governor or alternatively one of the mech-
anical flyweight type depending upon the application
to which the engine is fitted.
To Remove the Fuel Injection Pump
1. Remove the four high pressure pipes between the
pump and the atomisers and blank off all ports to
prevent the ingress of foreign particles.
2. Remove the low pressure fuel pipes from the inlet
and outlet connections and blank off all ports.
3. Disconnect the stop and throttle controls and their
return springs.
4. Remove the two nuts and the socket headed set-
screw which secure the fuel pump to the mount-
ing flange together with their spring and plain
washers.
5. Carefully withdraw the fuel pump from its mount-
ing.