International 986 Sputtering and Dying

   #1  

justin2988

New member
Joined
Jul 7, 2017
Messages
5
Location
Texas
Tractor
New Holland TC30
I inherited my grandfather's 1981 International 986 and it has been a great tractor, but last Fall I was pulling a plow behind it getting ready to plant some ryegrass and the tractor started sputtering with RPMs going up and down for about 20 seconds and then it died. I was able to crank it back up with ether, but the RPMs were going up and down, and after about 20 seconds it quit again. Again, cranked with ether, tractor ran rough, was able to give it a touch of ether to keep it running, limped it out of the middle of the field and parked it under a tree and left it there until this afternoon. Today the tractor was sluggish to start but once it fired I was able to drive it around smoothly for about 1,000 feet but then I could hear it start to sputter and slowly it died again, same behavior as before. Pretty sure it's a fuel issue but it's got fresh fuel in the tank and two fresh fuel filters. I cracked the rubber fuel hose between the filters and the pump and pushed the primer in and out and fuel was flowing out good of the hose and the primer had good pressure. Was wondering if anyone had any ideas on what is causing this issue? See photos for my fuel pump, filter, and lines setup.
 

Attachments

  • 20210421_190046.jpg
    20210421_190046.jpg
    2.5 MB · Views: 22
  • 20210421_190038.jpg
    20210421_190038.jpg
    2.2 MB · Views: 25
   #2  

K5lwq

Veteran Member
Joined
Aug 6, 2017
Messages
2,023
Location
Mineola, TX
Tractor
Kioti LK2554, Branson 4815C, Satoh Beaver, Speedex
When you say it has fresh filters is it different ones than what is pictured?
 
  
  • Thread Starter
#3  
OP
J

justin2988

New member
Joined
Jul 7, 2017
Messages
5
Location
Texas
Tractor
New Holland TC30
When you say it has fresh filters is it different ones than what is pictured?
I installed those on May 9, 2020 and only put 8 hours on the tractor since then. Same filters are still on the tractor.
 
   #4  

K5lwq

Veteran Member
Joined
Aug 6, 2017
Messages
2,023
Location
Mineola, TX
Tractor
Kioti LK2554, Branson 4815C, Satoh Beaver, Speedex
That what I was thinking might be the case. The filters were on the tractor when you first had issues. It could be possible that you got some bad fuel that has stopped up the filters again.

It may be worth replacing them again. If it does not correct the issue you will have a back up set for the future.
 
   #5  

Roadworthy

Veteran Member
Joined
Aug 24, 2019
Messages
1,731
Location
Southeast Washington
Tractor
Kubota L2501 HST,
Pull the fuel line at the first junction after the tank. Get a jar or a bucket and observe gravity flow directly from the tank to ensure you have a good, unobstructed flow. You could have crud in the tank. Of course after this exercise you will need to bleed the air from your system.
 
  
  • Thread Starter
#6  
OP
J

justin2988

New member
Joined
Jul 7, 2017
Messages
5
Location
Texas
Tractor
New Holland TC30
Replaced both fuel filters but the issue persisted. Tractor would run for a minute or two then starve for fuel and die. Did as Roadworthy suggested and disconnected the fuel line going into the primary filter housing and fuel was barley dripping out. Put my air hose on it, removed the fuel tank lid, and blew air up the line and first some milky sludge and then fuel came gushing out. Reconnected the line, purged the air, and the tractor ran perfect afterwards. I'll probably have to battle this again now that I know there's some gunk in the tank/line, maybe even drain and clean the tank, but now I know what to look for.

Are there any recommended diesel additives to put in the tank to help prevent this from happening?
 
Last edited:
 
Top