Fuel system Design and function General Please refer to a separate workshop manual for the fuel system of the TWD1231VE, which is an EDC engine.
Injection pump The injection pump is mounted on a bracket on the left-hand side of the engine. It is driven from the engine timing gears via a pump coupling consisting of two flanges and an intermediate section. Lubrication is by means of a connection to the engine lubrication system. The pressure levelling device and overflow valve are mounted opposite each other at the rear of the pump. The injection angle is measured as a lift from the basic circle with the dial indicator on the tappet for no. 1 cylinder pump element. The injection pump on some of the engines also have a smoke limiter, which is placed at the front of the injection pump.
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The main components of the fuel system are: fuel tank with level sensor, feed pump, two fuel filters, injection pump, injection timing adjuster (only TWD1030ME), injectors and piping.
