mid 50s to late 60s jd350 crawler
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
mid 50s to late 60s jd350 crawler
We own a late 50s to mid 60s jd 350 crawler. We are experiencing what started as a sputter to a total shut down. It will turn over cough but wont run. we have replaced or reworked the starter, alternator, valves, distributor, fuel pump and replaced both wiring harnesses. still nothing. good fire to plugs and there is fuel.. 120 lbs compresion to each cylinder. we however do not have a wiring diagram and the new wiring harnesses do have different components than the original that was a mess. any advice on what else to check or where to find a wiring diagram.???
- lastchancegarage
- 440 crawler
- Posts: 138
- Joined: Mon Jan 09, 2006 7:24 am
- Location: Ct.
Are you sure the timing is correct? If you're getting good spark at the plugs and good compression, I'd look at timing next. Hope this helps.
Scott
Scott
Keep the tracks down and the torque up!!
1959 JD 440 ICD dozer
1959 Case 310B backhoe w/belly grader option
195? ATC GT-25 dozer
19?? Stow 1 ton roller w/rare cooler option!
1959 JD 440 ICD dozer
1959 Case 310B backhoe w/belly grader option
195? ATC GT-25 dozer
19?? Stow 1 ton roller w/rare cooler option!
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
Thanks but time has been checked. Did fail to mention that we did jump the battery to the coil once and had the tractor going. we soon blew the resistor. We did this at a time when we got the tractor running but had to hold the key in the start position. Should there be a wire from the ign terminal on the key switch to the coil or voltage regulator then coil?????? This is the reason i was asking for the correct wiring diagram for this machine. The new wiring harness was not exactly like the original. Kind of a generic one for that generation tractor.
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
-
- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
what i really meant was, if there was supposed to be a wire from the ign. term on the key switch that would eventually find itself to the coil. But from what you tell me, there probably isnt. I cam rebuild an engine from the ground up, but cant find my way out of a paper bag when it comes to the electrical system. At least you have given me some direction on were to look. much appreciated.
Now that I think of it more, I think I said it wrong. There might be a wire from the switch to the coil, but I am thinking that somehow it should be fed from the ign side of the solenoid. The theory being, on a GM style solenoid, when the starter is engaged, the contacts inside feed full 12 volts to the coil. When the key is released from the start position to the run position, the power routes through the solenoid first, creating a resistance to lower voltage to the points instead of using an external ballast resistor. I may be all wet on this, and the switch itself may have its own external resistor.
Best bet is to look at the wiring diagram. Most likely what the sent you is the harness from a later 350 so some wires are different.
Lavoy
Best bet is to look at the wiring diagram. Most likely what the sent you is the harness from a later 350 so some wires are different.
Lavoy
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
I live in northern maine, town called Presque Isle. Dont even try to pronounce that. Lavoys latest info. gave us a confident feeling we're on the right track. Now that we think of it, I think the solenoid is the culprit. We had the starter rebuilt but kept the old solenoid. Don't ask me why. But I will let everyone know when we get this bute running. It is a very nice machine.
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- 1010 crawler
- Posts: 353
- Joined: Mon Apr 04, 2005 6:53 pm
- Location: Columbus Ohio
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
Howard, I am very interested in hearing more. The "new" key swith has no wire on the leg this is labeled ign. I thought that was odd. I then got information that led me to believe that maybe the solenoid is part of the circuit that allows juice to run through to the coil when the starter is not engaged. Right now we have a brand new wiring harnes, new regulator, new alternator, new starter and solenoid. We just had it hauled to our yard. It was about an hour away from out house out at our hunting camp.. We will have alot more time to look at it now. Hopefully Wed evening. Anything else to add, please advise. thanks everyone.
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
I my have given all of you some misinformation.. After talking with my father in law, who has been doing most of the work on this machine, he did inform me that when the crawler does start, it will only stay running with the help of the starter. In other words, it just doesn't have enought to run on its own. The wiring is alright, because when we leave the key in the on position, we can get fire to jump the primary dist. lead just by hand turning the engine. This seems to me to be a timing issue, right??
please advise.
please advise.
- lastchancegarage
- 440 crawler
- Posts: 138
- Joined: Mon Jan 09, 2006 7:24 am
- Location: Ct.
Keith,
Did you run the check I gave you in that pm I sent you? I could be off on this but it sounds like the timing is so advanced the key is needed to crank it through the firing cycle. I wouldn't think cranking the engine with timing that advanced would be particularly good for the starter. Have your father-in-law run that check and see where the engine timing stands. Other than timing, the only other thing I can think of that would start as a sputter and degrade steadily could be a condenser going south. I know you said it was replaced, but there could be a grounding issue (corrosion) that's causing the steady decline in running. If you are getting a consistent blue spark at the plugs then I'd go back to the timing. It's challenging to troubleshoot something without seeing all the parameters in front of you. Hope this helps.
Scott
p.s. I hope that after all of this it doesn't turn out to be crap in the idle circuit of the carb and the engine is leaned out. Where do you stand in the carb department, rebuilt?, new?
Did you run the check I gave you in that pm I sent you? I could be off on this but it sounds like the timing is so advanced the key is needed to crank it through the firing cycle. I wouldn't think cranking the engine with timing that advanced would be particularly good for the starter. Have your father-in-law run that check and see where the engine timing stands. Other than timing, the only other thing I can think of that would start as a sputter and degrade steadily could be a condenser going south. I know you said it was replaced, but there could be a grounding issue (corrosion) that's causing the steady decline in running. If you are getting a consistent blue spark at the plugs then I'd go back to the timing. It's challenging to troubleshoot something without seeing all the parameters in front of you. Hope this helps.
Scott
p.s. I hope that after all of this it doesn't turn out to be crap in the idle circuit of the carb and the engine is leaned out. Where do you stand in the carb department, rebuilt?, new?
Keep the tracks down and the torque up!!
1959 JD 440 ICD dozer
1959 Case 310B backhoe w/belly grader option
195? ATC GT-25 dozer
19?? Stow 1 ton roller w/rare cooler option!
1959 JD 440 ICD dozer
1959 Case 310B backhoe w/belly grader option
195? ATC GT-25 dozer
19?? Stow 1 ton roller w/rare cooler option!
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- 40C crawler
- Posts: 23
- Joined: Mon Jul 17, 2006 8:22 am
- Location: northeast
Thanks for the info last chance. As to the carb. it is brand new. we have the screws set out to 1 turn on the low speed and 2 turns on the high speed as our manual says. sounds odd to me. The whole distributor shaft and all the cuts are brand new. We did check for corrosion and everything seems to ground out great. I am going to try to pull the distributor out and reinstall it. we may be off a couple of teeth. Let me know if you can come up with anything else we can try..
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