walkertimothy7
New User
I have a 69 jd 4020 that smoke alot at low rpms with slight smoke at higher rpms. It's a grey is black smoke. And it does not use any oil. Is it a fuel problem?
- Thread starter walkertimothy7
- Start date
buickanddeere
Well-known Member
Idling, working at max or part way in between? Coolant temperature ? Injector condition ?
walkertimothy7
New User
Idling is when it's the worst. And it has a
new air filter. When I'm working with it
has a very faint haze.
new air filter. When I'm working with it
has a very faint haze.
walkertimothy7
New User
It cranks and runs great just smokes. I'm thinking about putting new injectors in it to see if that solves the problem.
RogerinIowa
Member
My '70 smokes about the same. I am not worrying about it. Diesels of that era smoke some.
walkertimothy7
New User
I've been around a few 4020 and never really seen them smoke like that. Just has me worried a little bit.
tomstractorsandtoys
Well-known Member
Which injection pump do you have? If it is the small one(which many early side console tractor had) that is the way they are. Tom
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
I agree with matthies. Air filter under hood he referred to is parts key 2.
walkertimothy7
New User
No it does not have a precleaner above the hood. So there is an additional filter?
walkertimothy7
New User
I'm not sure I will have to look.
walkertimothy7
New User
If the fuel has been turned up could it
cause the smoke?
cause the smoke?
buickanddeere
Well-known Member
Not at part load. I can't recall if the 4020 has an air filter inside the air filter or not ?
Retarded pump timing will make some smoke .
The colour of the sky or trees behind the tractor will either highlight or hide smoke .
notjustair
Well-known Member
Sounds like our 4020. It has been on this farm since new and rebuilt once. It has 24,000 hours on it now. It uses no oil but smokes a good bit. Years ago the stack was cut off so it fit in the lean to. Now you eat all of that. I rake with it and every year and I swear I'm going to put an extension on it. It hasn't happened.
Kent Petersen
Well-known Member
All 69 & 70 models had that little piece of junk pump
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