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#1
07-20-2014, 08:00 PM
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Over charging
I have a model 1872 CC super garden tractor with an 18 hp Kohler engine. I've replaced just about everything on this mower over the past 18 years. The PTO switch went bad several years ago and instead of buying a new one I used a "jumper" wire between the two ports in the plug. I went to use it today and noticed the voltage gauge was way over on charge. I shut it off and decided to put a toggle switch in place of the jumper wire. I started it back up and it was still charging. The two white wires that originally went to the PTO switch, which are joined together, got extremely hot and eventually it blew the fuse that's on the dash. I replaced the fuse and started tracing all the wires to see if any were shorted out. None were found. I replaced the ignition switch and still have the problem. I checked the voltage on the two white wit=re and they are putting out 14.5 volts. If I let it idle the wires get warm. When I go full throttle they get hot and blow the fuse. If I engage the PTO for the deck, the voltage drops to normal. I replaced the relay back when I replaced the ignition switch. I don't know of any way to check the rectifier-regulator. Since it is charging (constantly full charging), that should mean the alternator or stator is working.
The regulator is bolted on the back of the engine in the center and has three wires connected to it. I traced the white wire from the PTO switch and it's connected to the regulator. The other white wire that's joined with the other white wire at the PTO switch goes to the ignition switch. Would the rectifier-regulator be the problem? 
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
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