MF Starter

[Anonymous-0]

Well I spent a couple of hours at the neighbors - still have the same issue with the starter not disengaging (Massey Ferg). I followed all the suggestions - wiring seems fine, skinny wire is hot when ig is engaged - is not hot wen the key is released. Hooked up the starter and it works just fine setting on the tractor. Bolt it into the bell housing and it will not disengage. I wonder if the place that rebuilt the starter could have put the wrong size bendix gear in it?

 

[Dell (WA)]

Kornfused.......OK, now we have a "twist-to-start" ignition key system. And the starter solenoid is??? 1 or 2 itty-bitty control terminals???

I'm trying to visualize how a "wrong size bendix gear" could engage the flywheel starter ring. Not making it, CSFT?

You do know you must speed up the engine some to cause the Bendix drive to un-screw from the flywheel after starting, don't you?

So far, my gut intuition is WRONG SOLENOID. ......Dell, notta Massy/Fergy expert

 

[JMOR]

(quoted from post at 23:47:34 02/04/09) Well I spent a couple of hours at the neighbors - still have the same issue with the starter not disengaging (Massey Ferg). I followed all the suggestions - wiring seems fine, skinny wire is hot when ig is engaged - is not hot wen the key is released. Hooked up the starter and it works just fine setting on the tractor. Bolt it into the bell housing and it will not disengage. I wonder if the place that rebuilt the starter could have put the wrong size bendix gear in it?

Did you disconnect the 'skinny' wire from the solenoid as I told you (during the period of started engagement/engine running)? Did it make any difference?

What is on the other skinny terminal?

Is anything else connected to the wire to 'skinny' terminal other than the switch tying it to power?

 

[Anonymous-0]

Yes I did as you suggested - made no difference -the only way to stop the starter is to disconnect the battery. The skinny wire is on the left tiny post and goes to the nuetral saftey witch, then another lead goes to the switch. There is nothing on the other tiny post. There is another skinny wire (with large connector) that fits over the large post (with the positive cable) and this goes to the ammeter and then another lead goes to the switch.

I am thinking a short in the starter once it receives the current???

 

[Anonymous-0]

Dell, the tractor does not start - but starter should stop when key is released. 2 tiny posts- only the one on the left is used. I was thinking wrong ear because it would not pull back - but on further thought it is more than the gear - the starter itself is still initiating the gear. It has to be electrical. 3 brand new solenoids - all provided by the place that rebuilt the starter. Neighbor has been back to see them with the starter 3 times now.

 

[JMOR]

(quoted from post at 11:40:30 02/05/09) Yes I did as you suggested - made no difference -the only way to stop the starter is to disconnect the battery. The skinny wire is on the left tiny post and goes to the nuetral saftey witch, then another lead goes to the switch. There is nothing on the other tiny post. There is another skinny wire (with large connector) that fits over the large post (with the positive cable) and this goes to the ammeter and then another lead goes to the switch.

I am thinking a short in the starter once it receives the current???

Yes, it is possible that something in the switch portion of solenoid has failed, causing a 'short' resulting in power continuing to be applied when it shouldn't.
Still leaves a question as to how it appears to function ok, not bolted up & just 'laying on tractor'. I suppose this could be marked up to not being solidly grounded at the point & the wiggly motion momentarily removes ground, starter stops & you interpret this as 'it works fine just laying on tractor'???

Solenoid could be sticking, thus maintaining contact. The parts circled in yellow (springs, plunger, copper washer), if stick in left most actuated position, will keep power applied to motor even after you remove power from the small terminal. Or even the main plunger could be sticking.
This is all based on the premise that "I suppose this could be marked up to not being solidly grounded at the point & the wiggly motion momentarily removes ground, starter stops & you interpret this as 'it works fine just laying on tractor'???".

Just saw your post to dell about 3 solenoid replacements. Are they replacing the whole solenoid assy? Note, it separates just right of the copper washer/spring that make up the contact portion. If they are replacing only the right portion (not yellow parts), that could be the problem.

 

[bob2697]

I do not know if my problem is simular to yours or not on my 8N the starter would contune running after the engine was running(new starter & new solenoid I had to take it to the repair shop. What he did was reverse the solenoid and it works correct now. this solenoid had "bat" marked on one side, that is the way I hooked it up, the repairman put it the other way and it worked.