Farm Equipment - D15 diesel heavy smoke

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D15 diesel heavy smoke

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=188408
Printed Date: 28 Apr 2024 at 2:45pm
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Topic: D15 diesel heavy smoke

Posted By: SJNICK
Subject: D15 diesel heavy smoke
Date Posted: 23 May 2022 at 11:34am

Hi guys. I’m new to Allis tractors and I have acquired what I believe to be late 60s model D15 series II diesel. I want to get it running good to use in the hay fields this year. We had it running a few months ago and it was putting off a ton of black smoke and didn’t seem to have much power. Is that gonna be due to an injector issue (stuck)? If I pull it in the shop and start digging into it is there anything I need to be aware of? Thanks in advance.

Replies:

Posted By: DrAllis
Date Posted: 23 May 2022 at 6:13pm

First off, they were only 35 HP on a good day. I would highly suggest that you fully check out the air cleaner or maybe even disconnect it for testing purposes. Lack of AIR is the first thing you have to determine before you do anything else. When they are working hard, they will smoke and fairly heavy by today's modern diesel standards.

Posted By: Acdiesel
Date Posted: 24 May 2022 at 10:56am

Black smoke: As stated already, not enough air and to much fuel.

check for air restrictions, valve clearance, bad fuel and pump timing.

start with the easiest things first.

Good luck. Dan

-------------
D19 diesel,D17 diesel SER.3 D14 NF,D14 WF, D15 SER.II wf
D15 SER.2 DIESEL,D15 ser.II nf
D12 SER.I, D10 Ser.II
2-720'S

Gmc,caterpillar
I'm a pharmacist (farm assist) with a PHD (post hole digger)

Posted By: AC7060IL
Date Posted: 24 May 2022 at 12:54pm

X3. Sounds like maybe a bird nest or mouse nest has been built inside the engine’s intake air somewhere(outdoor air breather? Air filter? Engine intake manifold?,etc)

Welcome to the AC forum!

Posted By: SJNICK
Date Posted: 24 May 2022 at 1:26pm

I have checked the air intake (what you can see when you take the filter out) and all filters too. Everything looks good. I guess next step is to take the intake loose from the engine and check that side.

Posted By: DrAllis
Date Posted: 24 May 2022 at 5:43pm

If it is a dry type air filter, just leave it out and try it.

Posted By: tractorboy
Date Posted: 25 May 2022 at 12:33pm

Can't help you with the diesel, but welcome to the forum ! I'm just south of you in Halifax co. Good luck with the 15 ! keith so. va.