Farm Equipment - D19 Diesel Issues

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D19 Diesel Issues

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=175128
Printed Date: 03 Sep 2025 at 9:06am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D19 Diesel Issues

Posted By: Matt (Jordan,MN)
Subject: D19 Diesel Issues
Date Posted: 12 Oct 2020 at 7:24pm

I have been having some issues with my D19 Diesel. I rebuilt the engine a few years back and had it running super nice. I let the cousin use it to work up a field and had to tow it home. It broke the ball stud off for the advance in the injection pump. I took the pump and injectors off and sent them to the pump shop. When i put the pump and injectors back on i took apart and cleaned out the fuel system as there was lots of metal flakes in the fuel tank. It would now run but would not fire on #1 cylinder until it got to 160 degrees. Once it got up to temp it would run ok but was smoking a lot and was getting the top of the stack wet with diesel. I removed the head and found a few exhaust vales that where not sealing so i had the head rebuilt again with all new parts. Got the head back on and it runs better but not 100%. It fires on #1 right away and smokes less but still smokes more than it did before the injection pump broke and is still getting the top of the stack wet with diesel. So im asking the experts do you think the injectors are causing the wet stacking issue or is there something else that would cause it? When i had the injectors at the diesel shop they tested them and said they where good. With all the metal flakes that was in the tank i would have to think that some of them would have had to go through the injectors and messed up the tips.

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Owner of Matt Scott LLC
Specializing in NOS and used Allis Chalmers tractor & implement parts & liturature and Magneto Repair
http://www.mattscottllc.com/

Replies:

Posted By: MACK
Date Posted: 12 Oct 2020 at 8:40pm

I would have the injectors or #1 rechecked again. Also recheck timing. MACK

Posted By: Brian Jasper co. Ia
Date Posted: 12 Oct 2020 at 11:26pm

Did you remember to line up the two marks under the cover on the pump before you removed it to be rebuilt? Otherwise, get your compression gauge out and check the suspect holes.

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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford

Posted By: DrAllis
Date Posted: 13 Oct 2020 at 7:17am

With the advance pin sheared, he couldn't line up any timing marks. Any debris from the pin shear event didn't go thru any injectors, and whatever wound up in the fuel tank would have come from the pump return and the filters would have caught anything coming back out of the tank. You don't know how it was running before the pin sheared. Grinding the valve seats deeper into the head lowers compression a bit, even with new valves. Pump timing could be off a couple of degrees either way UNLESS you scribed the pump mounting flange to know exactly where the pump was positioned before removal.

Posted By: Acdiesel
Date Posted: 13 Oct 2020 at 10:59am

you could also try switching injectors with other cylinders and see if the problem follows.

do you know if the opening pressure of the injector is set correct (2000 psi I believe)

could be set to low and dumping in a little more fuel?

did your cousin happen to put old or dirty fuel in the tank the metal could have came from his can/tank. Just a thought.

dan

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D19 Diesel,D17 Diesel SER.3
2-D14, 2-D15 SER.II WF/NF
D15 SER.2 DIESEL
D12 SER.I, D10 Ser.II
2-720'S D21 Ser. II

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

Posted By: Matt (Jordan,MN)
Date Posted: 13 Oct 2020 at 6:09pm

Checked compression, piston and liner protrusion and all where in spec. I did swap injectors around and didn't move the problem. When the head was rebuilt i had new valves, guides, springs, and seats put in it. I cleaned and lapped in the energy cells and replaced a few that looked like they had a larger hole in them than the others. I will recheck the timing. otherwise i will pull injectors and have them tested.

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Owner of Matt Scott LLC
Specializing in NOS and used Allis Chalmers tractor & implement parts & liturature and Magneto Repair
http://www.mattscottllc.com/