JD 4020 Injector Pump Timing

NorthMNJD4020 · Apr 27, 2019

I noticed my DB injector pump starting leaking today after having the 4020 out for the first time this year. The old timer down the road said I should get it in time position before pulling it as it makes install a lot easier. Anyone mind walking me through timing these?

Much appreciated.

SVcummins · Apr 27, 2019

Open the cover on the bell housing roll the flywheel
around until you see the TDC stamped into the
flywheel the either remove the two screws or the
hex plug on the injection pump there is a line on the
pump that matches up with a line on the internal
part of the pump if you can?t see the line roll the
engine around one more time

NorthMNJD4020 · Apr 27, 2019

Thanks

Will the pump clear without completely removing the injector lines? Looks like it's pretty close.

D- · Apr 28, 2019

Remove the clamps and the lines will normally spring enough
for the pump to come out.
Sometimes depending on the model a line might have to be loosened
to allow it to swing a little.

Dieseltech · Apr 28, 2019

As said, align the pump marks under the two screw cover. When I remove those pumps I completely remove the outer three or four injection lines, the back lines can stay, just push them back when lifting the pump out.

JD 4020 Injector Pump Timing

NorthMNJD4020

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SVcummins

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NorthMNJD4020

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D-

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Dieseltech

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