Testing 930 oil pump

dkeav · Aug 28, 2016

Is there a procedure to test the oil pump on a 401? I've got it out of the engine and primed some diesel into with the pickup down in a bucket, spin the hell out of it and nothing. If I spin it backwards I get a few bubbles in the bucket. Shouldn't I be able to get it to move some liquid by hand, or will that not work?

John Saeli · Aug 30, 2016

The 930's used 2 different oil pumps, and they were both meant to pump oil, not diesel.

dkeav · Aug 30, 2016

(quoted from post at 07:32:53 08/30/16) The 930's used 2 different oil pumps, and they were both meant to pump oil, not diesel.

Well I'm not sure which model this is, but it doesn't pump a damn thing, including oil.

dkeav · Aug 30, 2016

On the plus side, it takes a lot less space in shop now. :lol:

John Saeli · Aug 30, 2016

The older style drove off the camshaft,& the late style drove off the front crank gear. At this point, I would assume a disassembly is in order.

dkeav · Aug 30, 2016

That will be the next step yep. It is looking like oil pump failure to be the cause of the spun main bearing though. Have to get a heavier engine stand, then will get that bolted up and disassembled to get the crank repaired.

Testing 930 oil pump

dkeav

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John Saeli

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dkeav

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John Saeli

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dkeav

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