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Lesser Known Classics Discussion Board

Nuffield 460 won't start

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Posted by FatherOf4 on July 23, 2013 at 17:52:11 from (

I have a Nuffield 460 that won"t start. Hoping someone has some ideas as to cause, or can even suggest what to look at next.

I"ve had it for 7 or 8 years, and it"s always started easily. This spring the first time I started it, it stalled. Started it again and it seem to run fine.

The next weekend, it started briefly (15-20 seconds), stalled and won"t start again.
Stalls were uneventful (no extra noise), as if it ran out of fuel.

It has a Simms inline fuel injector pump. I"ve bled it at the bolts above the inspection plate, and have lots of fuel there.

I opened the inspection plate on the fuel injector pump, and the rack moves freely, and all 4 pistons move up and down when cranking.

I pulled the fuel line off where it returns to the fuel tank, and I get fuel flow when cranking the engine, but the pressure is fairly low. It runs out of the line, but doesn"t shoot out with any force.

When cranking there is no sign of it firing at all.

One more "oddity". I didn"t know the fuel pump was supposed to have oil for lubrication. When I opened it to drain it and refill, I got about a cup of diesel out of oil drain. Keep in mind that I haven"t opened/drained this before in the 7 years I"ve owned it, and I doubt the guy who owned it before me had either.

I can only think of two possibilities:
1) The pump is not putting out the fuel with enough pressure to the injectors.
- How do can I check this?
- Do I need to bleed something else?

2) The valve train is somehow not working, and there is no compression
- Does this make sense? How is the cam shaft driven?

Any help appreciated.



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