Operation
5556−2/A1
Winterthur Gas & Diesel Ltd.
1/ 3
Fuel Pump − Cutting Out and Cutting In
1. General
If a fuel pump is unserviceable (e.g. the pump plunger cannot move) or the HP fuel
pipe is broken (between the fuel pump and the fuel rail) the fault must be repaired
immediately.
If the fault cannot be repaired, because the engine must operate, it is possible to cut
out the unserviceable fuel pump.
You must not operate the engine with a fuel pump removed. This will decrease the
supply of oil, i.e. there could be a decrease of lubrication to the other fuel pumps.
Note: If one fuel pump is cut out, there is almost no limit in engine operation. If
more than one pump is cut out, you can only operate the engine at
decreased load. When a fuel pump is cut out, oil in the system will
decrease.
2. Cutting Out and Cutting In
2.1 Cutting Out Procedure
1) Stop the engine.
2) Remove the applicable HP fuel pipe from the related fuel pump (see Fig. 1 and
the Maintenance Manual 8752−1 Removal).
3) Install the blank flange (3) (tool 94569) to the fuel pump (4).
4) Attach the blank flange (1) tool 94569a) to the intermediate piece (2).
5) Remove the applicable cover (5).
6) Find the position of the related cam.
3
1
2
4
Fig. 1
WCH02647
WCH02646
5
Data from W−X62
2014
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