68 350 acting strange
I finally got it running again. Didnt have time to go out and play with it yet but maybe in the next couple days. Everything seems to be running fine other than when idling, once in a while the rpms will speed up just for a second or two. Not sure if I just never payed attention to this before or if this is a sing of something else that needs attention. Now that its running, should I crack each injector line with the engine running to help bleed air one final time?
I would say that you probably still have a bubble of air. That will cause your RPM to fluctuate slightly. It may even work it's way on through after you take it and run it for a while. It wouldn't hurt to crack the lines at the injector just to see if you get a little dab of air. Glad to hear she is up and running again!
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.
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- 440 crawler
- Posts: 215
- Joined: Mon Apr 18, 2011 6:51 am
- Location: Granby,Québec, Canada
ok I knew about the gas engine going shut when you turn back the key but from what I read in the previous post I was under the impression he was talikng about a diesel engine .Paul Buhler wrote:Since the Diesel engine doesn't use a spark to ignite the fuel, to shut down the engine you have to cut off the fuel supply which is what happens when you bring the fuel lever down. Your machine shut off is functioning as designed.
On a gas machine, turning off the electric switch cuts the electricity to the spark plugs and the engine stops.
Hope this helps. Paul
thank you for the clarification anyway
Dig in boy !!
J-D 350 straight 1966
model # = T4F3D
serial # = 08883T
J-D 690-B 1980
model # = D690B
serial # = 007364T
Mack RB688S 1990 dumper
J-D 350 straight 1966
model # = T4F3D
serial # = 08883T
J-D 690-B 1980
model # = D690B
serial # = 007364T
Mack RB688S 1990 dumper
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- 440 crawler
- Posts: 215
- Joined: Mon Apr 18, 2011 6:51 am
- Location: Granby,Québec, Canada
- Paul Buhler
- 350 crawler
- Posts: 991
- Joined: Wed May 21, 2008 6:25 pm
- Location: Killington, VT
No problem. I'll defer to your explanation - and I learned something too. That's the nice thing about this board, there's room for elaboration and clarification. My memory sometimes gets faulty - I have machines that requires the fuel level be used to shut down even when the switch is turned off. PaulI must respectfully disagree.
Last edited by Paul Buhler on Wed Jan 09, 2013 10:35 am, edited 1 time in total.
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
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- 440 crawler
- Posts: 215
- Joined: Mon Apr 18, 2011 6:51 am
- Location: Granby,Québec, Canada
I can't speak to other models, but my 2010 diesel crawler has a DB injection pump and the key alone will not shut it off- I have to shut off the fuel supply with the throttle to kill the engine.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment
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- 440 crawler
- Posts: 215
- Joined: Mon Apr 18, 2011 6:51 am
- Location: Granby,Québec, Canada
exactly there is nothing on the pump ( as far as any wiring and or any terminal tha would be used to connect anything) that look likes any electrical hook-up .
thank you all for the info , this forum is simply the best .
thank you all for the info , this forum is simply the best .
Dig in boy !!
J-D 350 straight 1966
model # = T4F3D
serial # = 08883T
J-D 690-B 1980
model # = D690B
serial # = 007364T
Mack RB688S 1990 dumper
J-D 350 straight 1966
model # = T4F3D
serial # = 08883T
J-D 690-B 1980
model # = D690B
serial # = 007364T
Mack RB688S 1990 dumper
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