Perkins 4.99 - Fuel Injection Pump Refitting and Timing; Refitting Fuel Injection Pump; Fuel Injection Pump Timing

AIR CLEANERS AND FUEL SYSTEM-N.6
To Refit the Fuel Injection Pump
1. Replace the fuel pump mounting flange Joint
(where necessary).
2. Offer up the pump as shown in Fig. N.10 ensuring
that the master spline on its quill shaft is correctly
positioned to engage with the female splines within
the fuel pump drive hub.
NOTE:
This master spline ensures that the pump
will only locate in the drive hub in one position
for timing purposes.
3. When the splines are in correct alignment the
pump can be pushed in until the mounting flanges
meet and the securing nuts and setscrew with their
washers can be fitted.
4. Before tightening, align the timing marks scribed
on the fuel pump mounting flanges as shown in
Fig. N.11.
Tighten the setscrew and nuts.
5. Refit
the low pressure pipes to the inlet and outlet
connections.
6. Refit the high pressure fuel pipes.
7. Reconnect the throttle and stop controls together
with their return springs.
8. Prime the fuel system with fuel oil as detailed on
Page N.10.
9. Fuel pump timing can be checked as detailed in
the following text.
FUEL INJECTION PUMP TIMING
Reference should be made to the details given on
Page
K.1 covering engine timing. If this timing
sequence has been followed regarding the timing
gears and the timing marks on the mounting flanges
are correctly aligned as shown in Fig. N.1 then the
fuel pump timing should be correct.
N10
The checking of the scribed line on the fuel pump and
drive housing mounting flanges can be checked by
means of special tool MS67B (see Fig. N.12) as
follows :-
To Check Engine Marking Angle on
Fuel Pump Drive Housing
1. Turning engine in normal direction of rotation,
position No.1 piston at TD.C. compression stroke
by means of the timing pin or pointer.
2. Remove fuel injection pump.
N11
3. Release screw (5, Fig. N.12) and position splined
shaft (6) in tool so that relevant spline is to front
of tool.
4. Ensure that slotted pointer (2) is positioned with
slot to front of tool and chamfered sides of slot
outwards. At this stage. slotted ends of pointer
should be kept well back from front of body. Ensure
that flat in washer fitted behind pointer securing
screw (3) is located over pointer.
5. Release bracket screw (4) and set bracket so that
the chamfered edge is in line with the relevant
engine checking angle (see Page B.12).
N12