Perkins 4.99 - Fuel Pump Gear and Timing Procedures; Fuel Pump Gear Procedures; Fuel Injection Pump Timing

J5
J6
To Remove the Fuel Pump Gear
1. Remove the timing case front cover.
2. Remove the idler gear and hub.
3. Remove the three securing setscrews and ease
the
gear from its location on the fuel pump driving
hub.
4. Examine the gear for signs of excessive wear,
cracks, piting, etc.
To Refit the Fuel Pump Gear
1. Refit the fuel pump gear so that the timing marks
on the gear and hub respectively are in alignment
as shown in Fig. J.7.
TIMING CASE AND DRIVE-J.3
2. Refit the three securing setscrews, and tighten to
a
torque of 19-21 Ibf ft (2,6-2,9 kgf m).
3. Refit the idler gear and hub, timing case front
cover, etc.
To Fit New Fuel Pump Gear
In the event of a new fuel pump gear being required,
this will be supplied without timing marks and to
ensure correct fitment of the gear and timing of the
fuel injection pump, the following procedure should be
adopted:-
Using Special Tool MS67B (see Fig. N.12)
1.
2.
3.
4.
5.
6.
7.
8.
Turn crankshaft until Nos. 1 and 4 pistons are at
T.D.C., No. 1 piston
being on compression stroke.
Remove fuel pump gear.
Ensure that
the timing marks on crankshaft gear,
idler gear and camshaft coincide.
Remove fuel pump.
Set
special tool MS67B to the correct checking
angle (see Page B.12).
Fit special tool in place of fuel pump and line up
the slotted pOinter with the timing mark on the fuel
pump
mounting flange.
Fit the
new fuel pump gear, holding gear against
the direction of rotation to take up backlash. Tighten
the retaining setscrews.
Mark the new fuel pump gear with a scribed line to
coincide with the scribed line on the fuel pump
driving hub. Also stamp two dots on the new gear
to coincide with the single dot on the idler gear
(see Fig. K.1).
9. Check backlash of timing gears and adjust within
the limits as detailed on Page J.2.
Where
the special tool is not available, the following
method should be adopted.
1. Turn
crankshaft until Nos. 1 and 4 pistons are at
T.O.C., Nos. 1 piston being on compression stroke.
2. Remove fuel
pump gear and idler gear.
3.
Replace idler gear ensuring that timing marks on
crankshaft gear, idler gear and camshaft gear
coincide.
4. Turn crankshaft in opposite direction to normal
direction for about a quarter of a revolution. Then
turn in normal direction until No.1 piston is at its
static timing point (see Page N.7).
5. Remove fuel pump inspection plate (mechanically
governed pumps) or plate embodying fuel return
connection (hydraulically governed pumps)
enabling the fuel pump rotor to be seen.
6.
Then turn fuel pump driving hub until scribed line
on
the rotor marked "A" or "C" (for hydraulically
governed and mechanically governed pumps res-
pectively) coincides with the square end of the
fuel
pump timing circlip.
7. Ensuring timing gears and fuel pump shaft do not
move, fit fuel injection pump gear and secure with
three setscrews.
8. Turn crankshaft back slightly and then forward
again to No. 1 piston on static timing point to
check that fuel pump timing is correct.