Bristol crawler help needed

Valiant Farmer · Jan 20, 2020

Thanks for the reply. New info
gathered...Perkins diesel... Bristol
crawler

The engine would run away, then he plugged
a hole in the manifold, it hasn't run away since, but it smokes terribly. I need to
know what is wrong. Please help! Refer to previous post for pictures. What model?

caterpillar guy · Jan 20, 2020

Like they said in the previous post check the air filter and air ducting to the engine. Look for leaks. If you have a turbo on it look for leaking seals on the turbo (oil coming from the joint in the middle) if you do preferably don't run it till they are fixed. Could be a real costly mistake if it should happen to run on the oil. Othe wise if those all check out good might be just that worn out or timing could be that far out.

derwen1959 · Jan 20, 2020

Is it 3 or 4 cylinder engine?
Probably dates from early to mid 50's
You say you have put photos but nothing showing

Jim.ME · Jan 20, 2020

(quoted from post at 07:26:16 01/20/20) Is it 3 or 4 cylinder engine?
Probably dates from early to mid 50's
You say you have put photos but nothing showing

He said refer to photos in his [u:416d4ca392]previous[/u:416d4ca392] post. Here is a link to that post.

https://forums.yesterdaystractors.com/viewtopic.php?p=9270662&highlight=#9270662

Dieseltech · Jan 20, 2020

Re-read my answer in your previous post...

Bob Bancroft · Jan 20, 2020

Neighbor has a Cockshutt diesel. It's got a fuel system unlike any I have seen. The throttle lever doesn't go to the injector pump. It goes to the intake manifold, where it appears to be hooked to a throttle plate. Then there's a tube running from the manifold to the injector pump. Apparently "manifold pressure" [vacuum] controls fuel flow? Looks like trouble to me. Is this the kind of system you're talking about?

Traditional Farmer · Jan 20, 2020

Sounds like a 1250,those were Italian war surplus motors.

Valiant Farmer · Jan 20, 2020

Sorry...it is a Perkins P3 motor like in the Dexta. I have a Dexta so I know!

Valiant Farmer · Jan 20, 2020

Not a 1250, I've had one tho and it had low hours and ran great! Actually a FIAT 415, but same tractor

Valiant Farmer · Jan 20, 2020

Yes it is that sort of system. But our Dexta's P3 has one, and so does my David Brown 30D motor, and they work well.

Dieseltech · Jan 20, 2020

Yes, I know that. I gave an answer in the earlier post too. He has the vacuum governor system and any leaks will cause the engine to run away. The Cockshutt PD 40 Golden Eagle had the same system on early Perkins 4.270 diesels. Late models used the CAV DPA mechanical governed rotary pump.

Majorman · Jan 20, 2020

The Dexta does not have a P3 engine. The engine was made by Ford at Dagenham and assembled by Perkins. The P3 had chain driven timing gears and a CAV inline injection pump. There were also internal differences.Some parts will interchange with later engines but not the P3.

Bristol crawler help needed

Valiant Farmer

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caterpillar guy

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derwen1959

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Jim.ME

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Dieseltech

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Bob Bancroft

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Traditional Farmer

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Valiant Farmer

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Valiant Farmer

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Valiant Farmer

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Dieseltech

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Majorman

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