(800) 853-2651
SHOP NOW

John Deere f935 fuel problem

M

Markwemple

New User
I'll try to keep it quick. Previous owner was running it off of a soda bottle. Replaces all lines, tank lines and screen. Got it running then had issues. Ended up replacing electric pump and put in a filter before pump as debris was in the old pump. Running again. Now it stalls after around 10 minutes and is a pain to restart. Once started it acts like it is running on 1 or 2 cylinders foe a minute or 2 then revs up. This cycle is continuing over and over. Ideas??? Please help!
 
Is there known-pure/fresh, clean #2 diesel fuel in the tanks?

I dealt with a similar little diesel several years ago and the problem turned out to be that the owner had accidentally mixed gasoline in the diesel fuel.

Not enough to noticeably thin the diesel, or change the smell, but when the engine was started and warmed up a bit the higher vapor pressure of the mixed fuel would affect the injection pump, making it miss, sputter and stall 'til it cooled a bit.

Getting rid of the mixed fuel and replacing it was fresh fuel INSTANTLY cured the problem.

Something to at least consider.
Click to expand...
 

Fresh diesel. Is there an additive like diesel 911 that might help?

Also, for some reason the glow plug light is staying on. I haven't checked to see if they are actually still being powered the entire time.
 
who rebuilt the pump? when the lines were replaced, did the tank get cleaned also? 3-cylinder Yanmar diesel I would say you have a fuel problem, is the electric
pump to move fuel to the injector pump? What was there before, and do you have the same flow?
 

The injection pump wasn't rebuilt. The lift pump is part of the system. I did my best to clean the tanks. The in tank lines and screens are new JD parts.
 

The injection pump wasn't rebuilt. The lift pump is part of the system. I did my best to clean the tanks. The in tank lines and screens are new JD parts.
 

The injection pump wasn't rebuilt. The lift pump is part of the system. I did my best to clean the tanks. The in tank lines and screens are new JD parts.
 
If that needs to be bled like my Kubota diesel on my welder does it takes more than just getting fuel to come out of the bleeders. I bled it once and it would not run right bled again to no avail. Talked to either Miller or Kubota and they said it was not bled well enough yet. Ive been bleeding fuel filters and diesels in general for 45-50 years so though I knew it was bled. I don't have trouble with most of them bleeding the way I do it which is to start at the tank and work through to the injectors.
 
(quoted from post at 14:01:14 04/30/23) If that needs to be bled like my Kubota diesel on my welder does it takes more than just getting fuel to come out of the bleeders. I bled it once and it would not run right bled again to no avail. Talked to either Miller or Kubota and they said it was not bled well enough yet. Ive been bleeding fuel filters and diesels in general for 45-50 years so though I knew it was bled. I don't have trouble with most of them bleeding the way I do it which is to start at the tank and work through to the injectors.
Click to expand...

I bled the pump, then injector pump, then injectors but it could be more air. Just keep bleeding when this happens?
 
I have a f1145 deere that had similar problems several years ago, ended up taking both fuel tanks off to clean, ended up with about 1 cup of sludge out of each tank, looked like tar and was plugging up fuel pick up filters , shut off they would clear enough to start again. after cleaning no problems....
 
hadn't checked that. Thanks. Don't want to, but I'll drop the tanks and do a full tank clean and check again. My bad for having just filled them.
 
After a thorough cleaning of both tanks and all components and many bleed cycles I think I have it. Just in time to discover my deck wad thinner than I knew in places. So hours of welding before mowing


(quoted from post at 21:52:46 04/30/23) hadn't checked that. Thanks. Don't want to, but I'll drop the tanks and do a full tank clean and check again. My bad for having just filled them.
Click to expand...
 
(quoted from post at 17:05:09 05/08/23) After a thorough cleaning of both tanks and all components and many bleed cycles I think I have it. Just in time to discover my deck wad thinner than I knew in places. So hours of welding before mowing


(quoted from post at 21:52:46 04/30/23) hadn't checked that. Thanks. Don't want to, but I'll drop the tanks and do a full tank clean and check again. My bad for having just filled them.
Click to expand...
/quote]

Issue is still with me. No changes. Had to rebuild the deck so that slowed progress
Click to expand...
 
Bought a used F935 Yanmar 3T72UJ diesel. Don’t know how long it had been sitting but it will crank just fine, I get a cylinder it kick every so often and a little diesel smoke out the exhaust but it will not start. Read where I should make sure it has fresh good diesi in it. Like I said don’t know how long it had been sitting. Got I little diesel in my mouth when siphoning to empty to fuel tank and this has happened many times over the years (all legal mind you) as I’ve done a lot of mechanicing mostly gas over the years but never had diesel that tasted this bad. Still had a bad taste in my mouth an hour latter constantly spitting, had to get a beer to calm my tast buds. Any way back on track, I got a fuel can with fresh diesel, primed the system. With the electric fuel pump running I took the bleed screw completely out of the inlet in the injector pump an d get a solid clean 1/4” stream of fuel, but after bleeding for a while constant air bubbles and very little fuel at the injectors with the lines loose. Wonder if my injector pump is toast? Any thoughts.
 
You must log in or register to reply here.

Similar threads

S
574 with D239 fuel issues
2
Replies
26
Views
712
JimB2
J
C
John Deere 4020 Won't Run
Replies
10
Views
847
caseitman
C
L
air fuel problems
Replies
4
Views
329
Fixingfarmer
Fixingfarmer
B
John Deere 3010
Replies
1
Views
256
Dieseltech
D
L
Fuel system draws air ?
Replies
2
Views
233
logonberry
L
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top