[stranger_84]

Here goes, While mowing this week my 322 abruptly died. At first I thought it was a major breakdown but, on further inspection I found it to be an electrical issue. FYI it did still have a hair over 120psi of compression in all 3 holes! The orange wire on all 3 coils is hot, but, the other wire on the coil is hot constantly too. I changed the rectifier (ign module) but this did nothing for the issue. I am now drawing a blank on what the problem could be. Any help would be much appreciated!!

 

[chuckv]

Chad,

Welcome to the WFM forums! Is this 322 a tractor you have had for some time, or is a 'resurrection' project you are just starting? Either way, you need to get a copy of the TM1591 service manual -- it will be invaluable for the entire time you own this vintage machine.

Here is the ignition wiring on a 322:

Not sure what you mean by the "rectifier" module but the ignition coil switching on the negative terminal of each coil is driven by the Transistor Module as it senses the crank rotation using the Pulsar modules located on the flywheel housing.

Since you have voltage on the positive terminals of each coil, the TDCM is not a factor here and is working as it should.

For all three coils to have no change on the negative terminals as the engine is rotated, the most likely cause is the A2 Transistor Module, or an unplugged connector at X25, X26 or X27. Let us know what you find.

Chuck

 

[stranger_84]

Chuck,
Thank you for getting back with me and sharing your diagram it should help much. I have owned this machine for about 7 years I have a good friend who is a salesman at our local JD dealer so I get first dibs on any older machine he gets traded in.
Now, back to the problem. The "rectifier" I'm talking about is the 5 bladed module on the R side frame rail. I have replaced it before about 4 years ago. I ordered a new aftermarket one but it didn't solve the problem. I suppose the new one could be bad it was an aftermarket brand (JD wanted $190 for it I got it aftermarket for $40) Is there a test procedure for this to ensure it is working?

 

[900thun]

I think the 5 blade module is the regulator. In looking at the schematic that Chuck posted, I agree with him.
I would check these items:
* Black ground wire that goes to the Transistor Module. make sure it goes to ground.
* Connectors X18, X24, X25, X26 and X27.
* Possibly repair or replace the Transistor Module.

 

[900thun]

Transistor Module test procedure in the TM1591.

[URL="http://www.wfmachines.com/discus/messages/335/32027.jpg[/IMG]http://www.wfmachines.com/discus/messages/335/32027.jpg[/URL]

 

[chuckv]

Chad,

Yes, the frame mounted module is the voltage regulator and is involved only in the battery charging, not directly with the ignition.

I will send you some information by e-mail that is too large to post here...

Chuck

 

[craft57]

Chuck … has your e-mail addy changed ??? ….thx …GK

 

[stranger_84]

Thank you so much for the help and info! I was able to track down the problem and repair it, now its back to running like a top. Thanks again

 

[chuckv]

Gary,

That e-mail should work, but may block large attachments. I have (hopefully) updated my profile to a more generic one that accepts larger attachments...

Chad -- what did you find so others following this thread can benefit from matching a symptom to a solution.

Chuck

--on edit: OK I was able to change the e-mail address in one place in my profile, but not on the hot link. Anyone know how to do that??

 

[craft57]

Chuck : tried both listed on u'r profile …. both came back immediately ….. message failed was the message ???? ….

There were no files attached …. just a PM …… GK

 

[chuckv]

Gary,

I got your e-mail and sent you a long reply...

Are you sure it bounced from both domains??

Chuck