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JD 750 Compact Tractor - Starting Problems
| David Deemer | My 1983 JD 750 Compact Tractor with 602 hours on it has a random starting problem. Usually it starts right up, but some times nothing happens when I turn the key. When this happens the indicator lights come on but nothing else happens, it doesn't turn over or make any noises. It acts like the battery is dead but my multimeter shows the battery to be ~13.6 volts. Some times if I turn the key off and on several times it will start, but not always. Some times when it acts up like this I hook up some jumper cables and it will crank right up, but not always. I discovered this weekend that if I short across the two terminals on the starter it cranks right up even if nothing else is working. It appears that there are only two possibilities; either the ignition switch or the voltage regulator. But I don't have a wiring diagram so I don't know if I am missing something. Once it starts, it run great. Can anyone tell me where the problem is or how to find it? I don't want to start replacing parts until I find the problem! Thanks! Dave... |
| bontai Joe | Wouldn't be the voltage regulator, might be the starting solenoid.
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| Dale G. Basgall | Dave : On the 750 I believe it has a small plastic container above the engine valve cover and on the left side as your setting in the operators seat and it should have diesel in it and a rubber hose attached at the intake manifold. There is a wire going to where it attaches. That is the cold weather start and diesel drips onto a hot glow plug and vaporises the diesel for cold start. This has a relay that will cause the problem you describe. I live in a tropical climate and do not need the cold start system so I wired from the starter solenoid directly to the ignition switch and it has worked fine for years since that. Dale G. Basgall |
| John Heine | Have you checked neutral start safety switches?How about a bad connection.Check key switch with voltmeter when will not crank check voltage on switch.
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| hay | i'm not sure if this applies to the JD750, but on my JD 870 the PTO lever needs to be complety disengaged or the tractor will not start. you might check that on the JD 750. this almost drove me nuts trying to figger out why it would start or not start intermittenly.
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