8N will not crank over

Shelly_m11

New User
Okay I picked myself up in 8N tractor that's the only problem supposedly was it needed a head gasket I replace the head gasket and I cannot get the tractor to turn over I took the starter out and had it tested it's fine. I had a friend come with a multimeter and check, what I thought was the problem was the thumb button or starter button by the shifter. but I have power going past my thumb button, I have power from the ignition switch and I am getting power to the starter, but it will not engage. I'm completely dumbfounded.. The tractor has been switched over to a 12-volt system all electrical seems to be in good condition. It was a full running tractor 4 years ago and was after the head gasket went out. I've cleaned off terminals positive and grounds installed a new battery. Mechanically she's sound, the motor turns over freely by hand. I have an updated hydraulics on my bucket with downward pressure so it's tapped into the old crank on the front I was able to hook a ranch partially on it and get a half a spin and almost managed to get the tractor to fire on that. But I have something wrong along the lines of the ignition system any help would be much appreciated.
 
sorry for the few typos I was speaking into my phone as it's hard to type on a little phone and it wouldn't let me edit the errors but I hope you can understand what I'm trying to explain
 
You say you have power going past the thumb/start button. Not sure I understand that one. That button supplies ground to the solenoid. I'm guessing you mean that you are getting ground to the solenoid when you press that button? It might be a bad solenoid. Simple test is to make a jumper wire out of some fairly heavy gauge wire and jump across the two large posts on the solenoid. Just because you can read volts at the starter when you press the start button, doesn't mean you have enough current to run the starter motor. You could also take a jumper cable and jump from the hot side of the battery directly to the starter post, KEY OFF AND TRACTOR IN NEUTRAL. Let us know.
 
But I have something wrong along the lines of the ignition system any help would be much appreciated.
OK that makes little sense. You say it won't turn over when you activate the starter, so you're not up to an ignition problem yet, you're on a starter circuit problem.
You say it's been converted to 12V so I'll ASSume it's negative ground. Does it have the original push button starter switch at the shift lever? If so then you should see power there and when you push the button the button grounds the circuit which activates the solenoid. Or has someone rigged the tractor and used a pushbutton on the dash and wired it so the push button allows power to go through it to the solenoid?
 
Okay I tried to jump the solenoid I have nothing, I did replace the solenoid because I thought it was bad and this one's still does the same thing, when I try to jump it nothing.
I did hook a jumper cable from the positive side of the battery down to the starter it still does nothing. I have even used my truck pulling up next to the tractor and using its battery just in case my brand new battery didn't have enough charge for some reason, and I still get nothing not even a click
 
Yes it is negative ground and I still
have the push button the thumb button
starter right by the shifter, I do have
power flowing to it. I am showing a
little over 12 volts at the starter but
it won't turn over it just wont doing
anything
 
If the starter checks good as you say, then you are missing something, go back to square one and start over. Do not assume anything!
 

Get your own multi-meter then post back. You can get a cheap one for under $10.00, but I highly recommend a digital that automatically switches multipliers.
 
When you took the starter in to have it tested, did you clean the mounting surface on both the starter and clutch housing before putting it back on?
 
(quoted from post at 05:59:48 08/16/20)
Get your own multi-meter then post back. You can get a cheap one for under $10.00, but I highly recommend a digital that automatically switches multipliers.

Agree. But when testing something like a tractor, I would first place the leads on the battery and hit "range hold".
That way you will get smooth readings, rather than the display bouncing all over the place trying to find scale.
 
(quoted from post at 18:05:58 08/15/20) Yes it is negative ground and I still
have the push button the thumb button
starter right by the shifter, I do have
power flowing to it. I am showing a
little over 12 volts at the starter but
it won't turn over it just wont doing
anything
OK you say you have power flowing to the starter switch, how are you determining that? That thumb button grounds that flowing power which completes the circuit that activates the solenoid. You mention that you changed the solenoid, did you get the correct solenoid that activates by grounding the circuit? You say you have over 12v at the starter, where at the starter are you measuring the voltage and when. Is it where the positive battery cable connects to the solenoid?
 

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