Tractor smoke issue

KarmaKing · Oct 10, 2014

I just bought an 70's 300B, One issue is that it is smoking out of a tube that leads to the bottom of the engine. There is smoke coming out of the exhaust, but the majority comes out of the tube. Any ideas what it is, and how to fix it?

Animal · Oct 10, 2014

Blow by these are used instead of a pcv valve like your car has.

Steve@Advance · Oct 10, 2014

The smoke out the breather tube is caused by compression leaking by the rings.

Some smoke is normal especially on cold start up. If it smokes heavily, as in puffing smoke and oil mist, that is an indication the rings are either worn or stuck.

If the tractor has been sitting a long time they may be stuck and will loosen up with running. Might try some Marvel oil or transmission fluid in the cylinders, let it sit a couple days, see if they will loosen up.

If they're worn, either live with it as long as you can keep the oil in, or get ready for a rebuild.

One thing to check is be sure the oil is not overfull, is the correct viscosity, and not contaminated with fuel.

notjustair · Oct 10, 2014

Some smoke is normal. That's one of the first things I
remember about our tractors on the farm - the draft tube
puffing away. It seemed like our IH 966 did it more than
anything else that we had. It was new and never used oil but it
had some blowby. Sometimes if you work them good it will
reseat the rings and stop some of that.

These days the 4440 has a little blow by but for the most part
none of my current tractors puff much. The 4440 is turned up
and blows some good diesel smoke when you start it, but not
out of the draft tube.

Texasmark1 · Oct 11, 2014

I had a JD 4010D that I bought used doing it. What annoyed me
was that the breather tube was close enough to the operator's
seat that a lot of times I smelled burnt oil. No way was I going
to overhaul the engine just for that, no more than I used it.

So I drilled and tapped a 1/2" pipe thread in the side of the
intake manifold and installed a brass hose barb. Then took an
old piece of garden hose and connected the two. Problem
solved.

Mark

David G · Oct 11, 2014

Texas,

Did you come out the top of the rocker arm cover and abandon the pipe going down? If not I would be concerned about it filling with oil at the bottom of the hose.

rankrank1 · Oct 11, 2014

Dad had an old well worn Case 430 diesel back in the 1980's. Dad took and bent a custom puke tube from electrical condoit that ran clear down the side of the engine (actually it looked factory). Otherwise it ran okay, and we simply kept the oil topped off.

If the tractor is new to you and you do not know much about its history then I would certainly try working it extremely hard. Not too many people plow anymore but you if you bushhog, you could temporarily block off (all or part of) part of the discharge to purposely increase the load of mower by creating a mulching effect.

Short of that: Live with it as is, put a custom puke tube on it if it is currently in a nuisance spot, or rebuild it.

buickanddeere · Oct 11, 2014

Change the air filter, change the oil and filter for 30 or 40 straight weight. Put new HD diesel coolant and distilled water in the rad after flushing. Install a new transmission filter and clean the screen. Install a new fuel filter. Install a block heater for cold weather. DO NOT USE ETHER. Take the tractor out and work it hard, real hard for several hours. Odds are it will stink for a while and blow bad things out the stack.
If you feel real ambitious a set of brand new injectors with the pop pressure double checked won't do any harm.
Call 1-800-522-7448 for the operator's manual.
Odds are it will outlast most of us without an overhaul.

Texasmark1 · Oct 12, 2014

No. Just slid the hose over the end of the tube. Didn't pay any attention to where the tube originated. Would imagine that it would take a long time for it to fill with oil but never thought about it at the time. I guess if it plugged up the pressure relief would be seen elsewhere. Course the intake manifold had negative pressure on it which could help in pulling fumes out even if there was some oil in the bottom.

Doesn't matter now. That, a MF 35, and a Ford 3000 were traded in on my Branson in 2007 and I haven't looked back.

Mark

Tractor smoke issue

KarmaKing

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Animal

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Steve@Advance

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notjustair

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Texasmark1

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David G

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rankrank1

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buickanddeere

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Texasmark1

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