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Diesel fuel pump/installation

Ive been told that my 1971 miller welder/generator with a perkins diesel engine, that I just got and someone had already taken off the fuel pump,had to be timed when put back on,is this true?If so how do I do it? I dont think the engine has been turned over without the pump on ,but not positive.I have the pump and had it rebuilt already.please help asap thanks Larry

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If we're talking about the thing that has a pipe to each of the cylinders on your engine then the answer is Yes, your injector pump must be correctly timed in order for the engine to run properly. This is the part of the diesel that does what a distributor on regular car engine does, namely ignition timing.

The exact procedure for setting the timing depends on what model of engine you have, get a manual from Perkins to be sure.

That said it usually goes like this:
1 - make sure the engine has the correct cylinder at TDC, this makes the gear connected to the camshaft be in the correct position.

2 - Set the pump at the correct position, this will either involve looking at a mark in a window on the pump (standyne pumps), or looking at the keyway in the shaft of the pump, etc.

3 - Bolt the pump into place on the engine making sure the gears/drive meshes nicely. Connect all the fuel lines to the pump.

4 - purge the injectors by loosening each fuel line at the cylinder end and cranking the engine until fuel comes out of the pipe, then tighten it back up.

5 - Crank the engine and start it, check the rpm.

Rank this answer if it helped,
Carl

Posted on Dec 02, 2008

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