mf 390t

donalmcgovern

well lads thanks for reading. i have a 390t and there is something wrong with the rev counter. want to get itworking. any idea what is wrong with it or what fuses or where the sensor is? any diagrams appreciated. thanks lads

emaherx

Sensor is on the alternator.
There are 4 wires going to the alternator 3 of them are close together and are for charging.
The other one goes to revcounter. Disconnect this wire and.clean the contacts.

pakalasa

donalmcgovern wrote: »

... i have a 390t and there is something wrong with the rev counter.....

Says it all doesn't it. Seriously, are they that good a tractor. They seem to be an institution at this stage.
They're making enough money too, saw one advertised for 20k Euro recently.
You'd think Massey would put them back in production if they are that good.

Tora Bora

pakalasa wrote: »

Says it all doesn't it. Seriously, are they that good a tractor. They seem to be an institution at this stage.
They're making enough money too, saw one advertised for 20k Euro recently.
You'd think Massey would put them back in production if they are that good.

That's exactly why they don't put them back in production. They never made a penny on them in sales of expensive spares etc,. Modern equipment is sold at very low profit margin. However, the manufacturers soon start to make back the profit, on stupidly expensive filters, own brand oils, sensors, and other parts designed to have a limited life span.:(

MfMan

donalmcgovern wrote: »

well lads thanks for reading. i have a 390t and there is something wrong with the rev counter. want to get itworking. any idea what is wrong with it or what fuses or where the sensor is? any diagrams appreciated. thanks lads

Is the battery charging fully? Does the battery charge light illuminate when switching on the ignition or pulling the stopper? My own rev counter on the 390 works intermittently, corresponding with the light above coming on. Battery is on it's last legs I'd say. What is the normal life of a tractor battery anyway?

limerick farmer

my rev counter wasnt working properly but all that was wrong was the alternator belt was a little loose. I tightened it up and she worked perfectly you might have a different problem worth a shot any way.

donalmcgovern

Just an update. did up the alternator there in the frost and when putting it back on put the wire on the wrong stud coz didnt know what it was for so didnt really care as long as she moved. not really masseys fault. great machine otherwise never a days bother.

what happen

MfMan wrote: »

Is the battery charging fully? Does the battery charge light illuminate when switching on the ignition or pulling the stopper? My own rev counter on the 390 works intermittently, corresponding with the light above coming on. Battery is on it's last legs I'd say. What is the normal life of a tractor battery anyway?

a tractor battery should do 5 years or more.