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JD 730 electrics

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Marshall

01-13-2000 11:02:40

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Need info on 730 electric start,I am told that these tractors use 24 volt starters but the decal on the dash says 12 volt. The tractor in question belongs to my friend, I have been helping him get it going, is the whole electrical system 24 volt? The generator looks too small for 24 volts also the engine sounds like it is going to self destruct until it gets up to temp. All info on this tractor will be appreciated.

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Tim H

01-14-2000 15:31:50

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Re: JD 730 electrics in reply to Marshall, 01-13-2000 11:02:40

The JD730 with electric start has four 6 volt batteries (under the seat) wired in series to produce 24 volts for the starter. You will notice that both the positive and negative battery cables go to the starter. The negative battery cable does not ground to the tractor frame. Notice that a ground wire runs from one of the battery posts in the middle of the four battery series to the seat frame. Also, notice a wire from the positive side of the starter to the ignition/lamp switch on the dash. The starter uses all four batteries via the cables (24 volts), while the lamps use only two batteries vis power from the switch and ground to the frame (12 volts). The generator charges all four batteries (24 volt).

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Marshall

01-14-2000 20:04:59

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Re: Re: JD 730 electrics in reply to Tim H, 01-14-2000 15:31:50

Thanks Tim H your answer was very helpful the tractor now has two 12 volts

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Chad Wink

01-14-2000 05:03:10

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Re: JD 730 electrics in reply to Marshall, 01-13-2000 11:02:40

The 730 Diesel with factory direct electric start was a 24 volt generator, and starter. It did have a split system so that lights, etc where 12 volt.

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TWOPOP

01-13-2000 18:23:50

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Re: JD 730 electrics in reply to Marshall, 01-13-2000 11:02:40

i do not believe that they used 24 volt on these tractors,there is a possibility jd put some on 730d's it is easy enough to check the voltage on the starter. does it have the battery cables going to one location on the starter (I2V)OR ARE THERE TWO CABLES,one going to the solenoid and one going to the back side of the starter(24v) On the generator are there 2 wires (12v) or 3 wires (24v) on the regulator are there 3 terminals (12v) or are there 4 terminals(24v) even if it does have 24v starting it would still be a 12 volt electrical system

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