MF35 Battery issue

scottnumurkah · Jul 17, 2011

Hi guys,

I need some help. I have lent my MF35 to my son, who had some issues with the tractor starting. He suspected bad/old battery so took out the battery from his V8 ute and put it in the MF35. He turned the key and there was sparks and a click. He replaced this with the original battery which at least cranked the engine. Now nothing just a click. THe battery from the ute was obviously way to powerful for the old MF35?.

My question is what needs replacing?, as i am pretty sure a fuse has blown or the Regulator needs replacing?, as that is where the click is now coming from. I now have my tractor back and want to start using it again. I see Voltage regulators are on ebay for $55.

Any help would be much appreciated.

Cheers
Scott

ultrarunner · Jul 17, 2011

scottnumurkah said:
Hi guys,

I need some help. I have lent my MF35 to my son, who had some issues with the tractor starting. He suspected bad/old battery so took out the battery from his V8 ute and put it in the MF35. He turned the key and there was sparks and a click. He replaced this with the original battery which at least cranked the engine. Now nothing just a click. THe battery from the ute was obviously way to powerful for the old MF35?.

My question is what needs replacing?, as i am pretty sure a fuse has blown or the Regulator needs replacing?, as that is where the click is now coming from. I now have my tractor back and want to start using it again. I see Voltage regulators are on ebay for $55.

Any help would be much appreciated.

Cheers
Scott

Do you think he had the polarity reversed or the new battery was not the same voltage?

scottnumurkah · Jul 17, 2011

he swears the polarity was hooked up correctly. The battery out of my v8 ute is a pretty heavy duty battery. Its a 12 volt battery i am pretty sure. Any suggestions?.

ultrarunner · Jul 17, 2011

Can you by-pass the starter solenoid to see if it cranks?

A regulator shouldn't affect starting... only keeping the battery charged.

I don't have a MF35... only thinking what I would check if you know the battery is good.

The size, cranking power shouldn't have any effect as long as it is big enough to supply the amps necessary.

scottnumurkah · Jul 17, 2011

And if it cant supply the amps as nescessary?

I will try your suggestion

ultrarunner · Jul 17, 2011

MF35 is 1960 to 65 and has a 12 volt system.

The gas powered model uses a single 12-volt battery and the Diesel shows 2 6-volts...

scottnumurkah · Jul 17, 2011

I actually forgot to mention this is a FE35 1957 model that is colored the same as the MF35.

Do the FE35's have a 12 volt system?.

banjodunn · Jul 17, 2011

G'day your system should be 12v but can't tell you off the top of my head if it is +ve or -ve earth, you could have a battery out of a D9 and it would not be too big so long as the voltage is the same. Try pulling your starter out it may be jammed on the flywheel.
P.s. are you at numurkah near shep??

Jon

scottnumurkah · Jul 17, 2011

OK i'll try that cheers.

I am in Numurkah, near Shepp yes.

ultrarunner · Jul 17, 2011

banjodunn said:
G'day your system should be 12v but can't tell you off the top of my head if it is +ve or -ve earth, you could have a battery out of a D9 and it would not be too big so long as the voltage is the same. Try pulling your starter out it may be jammed on the flywheel.
P.s. are you at numurkah near shep??

Jon

Good point... I've freed more than a few "Frozen" motors by rocking the tractor front to back while in gear to free a jammed starter.