tn75a wont shut off

[DwayneB]

I'd just like to know how this turned out. So many threads just tail off into nothingness!

 

[wholesale trans]

I'd just like to know how this turned out. So many threads just tail off into nothingness!

Just to update I'm still working on the tractor it's in our shop so I will see if I have time to mess with it Monday I will let you know if I find anything out . One thing I know is if I disable the charging system it will shut off every time I turn key off so it's charging voltage related

 

[DwayneB]

Just to update I'm still working on the tractor it's in our shop so I will see if I have time to mess with it Monday I will let you know if I find anything out . One thing I know is if I disable the charging system it will shut off every time I turn key off so it's charging voltage related

My td80d has an external diode it's hooked to the positive at the alternator and grounded on the alternator. The book says it's over voltage protection.
Also if one of the diodes in the rectifier is bad your alternator could be putting out too much AC voltage and still charging the battery.
Good luck.

 

[wholesale trans]

Yes I already tried a brand new alternator from my new holland dealer

 

[DwayneB]

Yes I already tried a brand new alternator from my new holland dealer

Yours doesn't have the external diode?

 

[wholesale trans]

Yes but new alternator came with a brand new diode .

 

[DwayneB]

Yes but new alternator came with a brand new diode .

I'm surprised someone hasn't chimed in with a fix. You might try posting in the todays tractor section over at yesterdaystracrors.com lots of knowledge there.

 

[Jerry/MT]

with the tractor running if you pulled the fuel solenoid wire terminal off the fuel solenoid shouldnt that kill the engine?

It should but if I am correct about the solenoid having two coils, there should be two wires.

 

[wholesale trans]

Yeah only one wire to solenoid if you unplug tractor shuts off instantly. I didn't have a chance to work on it today too many other jobs in shop this is a fill in . I have a few ideas I will respond when I finish my next bank of testing thank you for everyone's ideas . I'm always open to ideas

 

[DwayneB]

I think at this point your chasing some bad insulation on some wiring somewhere. Probably gonna take a while to actually find it. I've seen corroded connections in relay sockets also.