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How do i install and time the injector pump on an old 870 case 4 cylinder diesel with a manual transmission?

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There Should be TIMING MARKS on BOTH Engine Side and On the Pump The Engine Should be set at TDC Slightly BEFORE POWER STROKE If I Could "SEE" what You Have It Would Be Simpiler for me to Explain. But what I have Said here I do KNOW as A Matter of FACT Hope this Helps

Posted on Jan 30, 2010

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Posted on Jan 02, 2017

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I have a Toyota Hilux 2.8 diesel 3l engine injector pump has great pressure on only 3 cylinders but number 4 is lacking pressure enough to make it miss , what can corse this problem


You didn't say but presumably the engine uses a DPA type or distributor type injection pump.

In this case the injector line pressure is governed by the condition and setting of each injector. If the break-off pressure of an injector is set to 80 atmospheres that pump element will produce a pressure of 80 atmospheres.

If one injector becomes "soft" and worn so the break-off pressure has fallen to 20 atmospheres for instance, or if the injector sticks open, the pressure generated by the pump will be either 20 atmospheres or virtually nothing.

When a conventional diesel engine develops a misfire, best practice is to ensure valve clearances and suchlike are in order, the compression pressure is good and then independently test the injector (and heater plug).

If everything is in order the pump should be removed for testing, repair and recalibration.

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If the injector pump is driven from inside the crank case the pump could be the cause of fuel in oil. I saw this problem happen on a Ford

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Volvo Penta marine diesel 2003T engine has diesel in sump


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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

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