New owner of L175...smokes terribly bad...

[jollyrodger]

Just bought a Kubota L175 (1975), and I think I made a mistake...this thing starts but sokes up the shop completely...it's absolutely terrible...any ideas?
I've adjusted the valves...but don't know much about injection pump or injectors enough to tear apart... i believe the pump has to be timed...and frankly just don't know enough...

 

[jollyrodger]

Smokes...

 

[Hugo Habicht]

With smoke I would check the air filter first.

And you can download the workshop manual here:

Index of Kubotabooks/Tractor Owners Manuals/

Oh, and welcome to Orange Tractor Talks !

 

[lmichael]

Depends on what type of smoke as well. It could be anything at this point. Excess fuel, bad oil burning, burning antifreeze. So you have to nail down what type of "smoke" you see

 

[Hugo Habicht]

Depends on what type of smoke as well. It could be anything at this point. Excess fuel, bad oil burning, burning antifreeze. So you have to nail down what type of "smoke" you see

Good point. Black or white? I had assumed black.

 

[ruger1980]

Don't forget blue smoke as well

 

[Hugo Habicht]

Don't forget blue smoke as well

Well, I thought of blue as white(ish) as being burnt oil.

 

[jollyrodger]

Thx guys, sorry should have said...it's not black...it's white/blue...smells like a lot of fuel...and doesn't clear up...could it be injectors not spraying and just dumping or is there an adjustment tofuel pump?

 

[jollyrodger]

With smoke I would check the air filter first.

And you can download the workshop manual here:

Index of Kubotabooks/Tractor Owners Manuals/

Oh, and welcome to Orange Tractor Talks !

Thank you

 

[ruger1980]

Well, I thought of blue as white(ish) as being burnt oil.

Blue can be excess oil bypassing the rings, or it could be unburnt fuel. White to grey can mean water/coolant or improper timing. Timing can also be a bit blue. Black is incomplete combustion

 

[ruger1980]

Thx guys, sorry should have said...it's not black...it's white/blue...smells like a lot of fuel...and doesn't clear up...could it be injectors not spraying and just dumping or is there an adjustment tofuel pump?

Is this with just a cold engine? They will often smoke quite a bit when cold. Try running it with a load to see if it clears up at all.

If it does not it could be injectors, timing or possibly poor compression. Maybe post a video of it cold and then warmed up.

 

[whatsupdoc]

I would do a compression test first, if it is low then there is no point diagnosing fuel issues.

 

[Mruysch]

That's why I have an exhaust hood over my tractor exhaust in my shop. My tractor smokes horrendous amounts of blue when it is cold. Burns the eye's like crazy

 

[jollyrodger]

I would do a compression test first, if it is low then there is no point diagnosing fuel issues.

Sounds like a plan. Thank you

 

[jollyrodger]

Here's the beast running...although I did let it run for probably 20 minutes and the smoke did lessen...IDK but it sounds like an exhaust valve isn't right...don't know if you guys can hear it...
Guess I can't show the video...can't find how to attach it...sorry.

 

[jollyrodger]

 

[Russell King]

You can post the video on your favorite YouTube or similar site and the put a link here.

But that amount of smoke isn’t right.

Start by getting a diesel engine compression check kit that will have an adapter for the glow plug ports. I would recommend you buy new glow plugs and get a deep thin walled socket that fits them and install the new ones after you have done the compression test.

I am assuming your tractor is fairly stock, the glow plugs are wired correctly through the indicator and you know how to use them correctly. But that probably won’t help with the smoke (after 20 minutes it should have been warm enough that the glow plugs would not help it start much).

You may want to replace the injectors and their seals (from the dealer or Oregon injection repair) to eliminate them as the problem if you want to spend that much money now without much troubleshooting done.

 

[Mruysch]

View attachment 156286

Mine is smokie but not that bad

 

[lmichael]

Looks like it's rolling coal

 

[jollyrodger]

You can post the video on your favorite YouTube or similar site and the put a link here.

But that amount of smoke isn’t right.

Start by getting a diesel engine compression check kit that will have an adapter for the glow plug ports. I would recommend you buy new glow plugs and get a deep thin walled socket that fits them and install the new ones after you have done the compression test.

I am assuming your tractor is fairly stock, the glow plugs are wired correctly through the indicator and you know how to use them correctly. But that probably won’t help with the smoke (after 20 minutes it should have been warm enough that the glow plugs would not help it start much).

You may want to replace the injectors and their seals (from the dealer or Oregon injection repair) to eliminate them as the problem if you want to spend that much money now without much troubleshooting done.

The guy i bought it from said he put new glow plugs in and they do look new and they do work. I don't know if it's stock or ever been overhauled, but that much smoke i would say not...
Might be a winter overhaul project...and i wondered about trying injectors...