JD 3020 diesel problem

Bob Gauntt · Jun 28, 2018

Starts and runs for a few seconds then stalls. Bled lines to pump, yes their is fuel in the tank. any ideas?

Bob · Jun 28, 2018

If you have the Roosa Master/Standyne "DB" series injection pump, likely, the "governor damper ring" in your injection pump has failed, and turned into what looks like "coffee grounds" and is clogging the return fitting/pressure regulating valve in the pump cover.

This causes the pump to build up internal pressure, which prevents the pumping plungers from taking on a charge of fuel, and fuel injection (and the engine)stops.

To confirm this, if you can do this safely, loosen the 2 screws in the little timing window, which allows fuel to leak, and relieves housing pressure.

The engine should then start and run, confirming the need for a pump rebuild.

As a side note, in the odd event the fuel return line back to the tanks has been damaged, crushed, or otherwise block, this will cause the same problem.

Bob Gauntt · Jun 28, 2018

I will check that out. Thanks

Bob Gauntt · Jun 28, 2018

Removed the timing cover and found some black particles in the opening, tractor started right up and ran good, fuel came out of the opening.

Bob Gauntt · Jun 28, 2018

Thanks Bob, you were spot on, Taking it in tomorrow to get rebuilt.

JD 3020 diesel problem

Bob Gauntt

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Bob

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Bob Gauntt

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Bob Gauntt

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Bob Gauntt

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