Bomag BW 156 D-3, Service Manual

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Service Training
BW 156/177 D-3/PD-3 - C 12 -
BW 178/179 D-3/PD-3
Changing the injection pump
Preparation:
• Thoroughly clean the area around the injection pump.
• Disconnect the fuel line to the pump.
• Disassemble the control linkage.
• Disassemble the control air line for the fuel-air mix.
• Remove the oil lines.
Note:
Dirt or water in the fuel system can lead to engine damage. A small dirt particle or a few drops of water
in the injection system can damage your engine.
You should therefore thoroughly clean all surfaces of the injection pump, including all line connections
and fittings that have to be disassembled. Clean the areas around the cover for the injection pump gear,
so that no dirt can fall into the crankcase.
Disassembly
Find the top dead centre for cylinder 1. Press the pin for the top dead centre into the bore in the camshaft
gear while slowly turning the engine.
The gear needed for this purpose (special tool, Cummins part-no. 3824591) is inserted into the flywheel
housing and meshes with the flywheel ring gear. The engine can now be cranked with a 1/2“ reversible
ratchet.