21
Service
Training
Fuel injection pump timing
The new 1000 Series engines are fitted with a hub driven fuel injection pump which is pin timed, the
manufacturer fits the hub to the pump, there is no key way locating the shaft to the hub so if the central nut in
the hub is disturbed, the fuel pump timing will be lost and the hub will need to be re-fitted using specialist
equipment.
If the fuel injection pump is to be removed you will first need to:
1. Remove the cover plate from the timing cover to allow access to the fuel injection pump. This will also
expose the pin location for timing the fuel pump to the engine.
2. Establish No. 1 cylinder is at top dead center on the compression stroke.
3. Fit the timing pin tool (PD. 246) through the slotted hole in the front of the gear, the pin will pass
through the hub and into the front face of the fuel injection pump. This has now locked the fuel
injection pump. (The crankshaft must not be rotated with the timing pin installed).
4. Slacken and remove the three fuel injection pump flange nuts.
5. Slacken and remove the four-torx screws (using special tool part number 27610122) on the fuel
injection pump gear, now the pump can be carefully removed.
To Re-fit the Fuel Injection Pump
1. Check that the engine is still at top dead center.
2. With the timing pin fitted to the fuel injection pump, it can now be carefully installed on the engine,
ensuring that all backlash is removed from the gears before tightening.
Adjusting Fuel Pump Timing
If with no. 1 cylinder on the top dead center on the compression stroke it is not possible to insert the timing pin
fully, adjustment may have to be made by slackening the four torx screws and rotating the fuel injection pump
hub until the pin can be fully installed.
Figure 3-4
P100T009
How to Prime the fuel system
Caution: When air is to be eliminated from the fuel
system, only use the starter motor to start the engine
after air has been eliminated from the low-pressure
side of the fuel system.
If air enters the fuel system, it must be eliminated
before the engine can be started.
Air can enter the system if:
•
The fuel tank is drained during normal operation.
•
The low-pressure fuel pipes are disconnected.
•
A part of the low-pressure fuel system leaks during
engine operation.
1 Press the priming lever (2) of the fuel lift pump
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