JD 450c runs for short time and stops but will immediately restart
JD 450c runs for short time and stops but will immediately restart
Have a sound 1980 JD 450c loader. Ran great and then began stalling out as it it was running out of fuel. It will repeatedly re start immediately a will take throttle for less than a minute or two and then acts like it is starving for fuel, then shuts down. To fix I Have change the fuel out and cleaned tank ( almost no dirt in tank ), made sure tank vent line open and injector return line open, changed the fuel filter and filter refilled with hand pump quickly, changed air filter and made sure no air intake obstructions. Disconnected fuel selonoid contact wire at injector pump post while running and it shut down ( as it appears it should work). Had return line open as it was shutting down and it appeared to still have some return pressure and fuel running. What else should I do to fix it? Thanks
Re: JD 450c runs for short time and stops but will immediately restart
I know you said the tank vent line is open, but.. have you tried running the tractor with the fuel tank cap off? I'm grasping at straws, as you have done a lot. ?injection pump.i know you said the return line was still flowing. Bruce
Re: JD 450c runs for short time and stops but will immediately restart
Yes I ran as well with cap off to double check. Also I just pulled off the timing cover plate on the injection pump to check for crud as another suggested and some fuel came out. Is that supposed to happen? And if not what does it suggest? Was clean inside it. When I started it today ran as it should for about 2-3 minutes including taking full throttle before dying off. Each time after that ( almost immediately about 4 times) it started right up but died off fairly quickly. That’s where I am at??? Any other checks / ideas before I have to pull the ignition pump?
- Stan Disbrow
- 350 crawler
- Posts: 2899
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Re: JD 450c runs for short time and stops but will immediately restart
Hi,
Yeah, some fuel comes out the timing window when you take the cover off. There should be a good fuel flow out the back end of the IP going back to the tank. From the sound of it, you have a restriction in the return line. What it is doing is exactly what they do when there is a restriction in the return line. Now, the question is: is 1980 new enough to where we don't have to think Pellethane ring and 'mouse turds'??
Stan
Yeah, some fuel comes out the timing window when you take the cover off. There should be a good fuel flow out the back end of the IP going back to the tank. From the sound of it, you have a restriction in the return line. What it is doing is exactly what they do when there is a restriction in the return line. Now, the question is: is 1980 new enough to where we don't have to think Pellethane ring and 'mouse turds'??
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
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- 40C crawler
- Posts: 20
- Joined: Wed Jun 01, 2005 11:20 pm
- Location: EDMONTON ALBERTA
Re: JD 450c runs for short time and stops but will immediately restart
Try removing the return fitting out of the top of the injection pump and try runnng with it removed.
- gregjo1948
- 350 crawler
- Posts: 1000
- Joined: Mon Aug 30, 2010 5:58 am
- Location: Newark Valley,NY,USA
Re: JD 450c runs for short time and stops but will immediately restart
I'm betting this is the problem. I had a JD 300B tire tractor with the same symptoms. That fitting is a check valve making that fuel line one way.jwbcontracting wrote: ↑Thu Aug 02, 2018 8:16 pmTry removing the return fitting out of the top of the injection pump and try runnng with it removed.
For about $10.00 and 20 minutes labor, your 6-7 ton machine should be back doing it's job.
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17, 1620 Ford
Re: JD 450c runs for short time and stops but will immediately restart
Will try removing the return line at the injection pump and see what happens. Thanks
Re: JD 450c runs for short time and stops but will immediately restart
I have a 450C dozer had same problem was mouse turds in injection pump had pump rebuilt all better !!
JIM
JIM
Re: JD 450c runs for short time and stops but will immediately restart
How do you check for the mouse turds?
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- 1010 crawler
- Posts: 258
- Joined: Wed Sep 11, 2013 3:34 pm
- Location: Shiner, texas
Re: JD 450c runs for short time and stops but will immediately restart
If you remove only the return line and not the check valve then watch to see if flow stops from obstruction by mouse turds. If you remove the fitting then catch what comes out while running and look for them. They usually appear in the timing window you removed but found clean.
Early 40C w/Yakima toolbar and homebuilt ripper: 350 w/6-way
Re: JD 450c runs for short time and stops but will immediately restart
I disconnected the return line connector at the injection pump and it ran normal. Although line was totally clean something had affected the little foot valve. I cleaned it and put it back in and runs fine. Thanks for the good advice. Glad I did all the other work that let me know how good of shape my 450 is in.
- Stan Disbrow
- 350 crawler
- Posts: 2899
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Re: JD 450c runs for short time and stops but will immediately restart
Hi,
Glad it ain't that ring turning into mouse turds!
Stan
Glad it ain't that ring turning into mouse turds!
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
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