Interlock module on Agco/Allis 918H

[DBlock 0]

I am having trouble with the interlock module on my 918 garden tractor. I blew one and replaced it and it only lasted about 15 minutes before it blew out also. Any ideas as to why this happening. I was told one remedy was to disconnect all the safety switches but I really didn't want to do that. Thanx!!!!

[JeffNemes 0]

I don't recall these having a safety interlock "module" - what does it look like and where is it located?

[DBlock 0]

It is located behind the battery under the dash and is a small bakelite box ( 1" square with two bolt holes , one on each side) with 5 wires coming out of it. Two wire are used as a shunt and the other four I assume go to the safety switches. It has a 6 prong plug. Agco/Allis #1707755.

[JeffNemes 0]

How old is it and what is the MFG number?

[DBlock 0]

1992, MFG #1692144

[JeffNemes 0]

Well - as you can see I have had no problems with these yet and there are no bulletins on it. The safety module has been used on the 18 HP Soverein series since it was made. There may be some wire or component grounding out somewhere - especially if it has beed working fine up untill now and all of a sudden you are having a problem. Is all else functioning properly? Battery OK? Charging OK? Did it run OK untill you shut it off or did it stop by itself? Did the module show signs of being burned?

[DBlock 0]

Everything was O.K. It just quit running and the module was burned and smoke came out of it. I've got an electrical schematic, so I will be looking at that to see if I can find any other components that may be faulty or show some damage as well.[A href='`']`[/a]

[JeffNemes 0]

Did you hose it down before this started happening?

[DBlock 0]

A buddy of mine is somewhat of an electrical genius and with help of a schematic he narrowed the problem down to the voltage regulated/rectifier. I replaced the interlock module, main circuit braker and the voltage regulater rectifier. Problem solved. Thanks for your help!!!!!!