PTO Fuse Blows Under Load

[PhilGG]

I have a 2008 TYM 273 HST. The problem is that whenever the PTO is under a load for several minutes, the 7.5A fuse blows. It appears the warmer the engine or ambient temperature, the quicker the fuse blows until it only moves a few feet and blows (this, of course, happening after it has just been replaced). I’ve replaced the PTO ON/OFF switch and swapped out the PTO shaft. No luck. I’ve reset the fuse slot to get a better grip on the fuse, but still no luck. I’ve checked for loose wires and harnesses, but can’t find any.
When I engage the PTO for the Brushcutter, it shakers at max PTO RPM, but that doesn’t seem to trip the fuse.
Any help or suggestions would be appreciated.

 

[jigs_n_fixtures]

Guess is you have a wire with worn insulation somewhere, and as things vibrate it shorts. Just a guess. I'm away from home and my manuals and tractors so can't look at things to come up with a better response.

 

[Bud Soda]

When I had a 273 I had a lot of problems with chafed wiring harness under the dash. I built a subframe connector to stop the chassis from flexing.

 

[PhilGG]

Thanks for your replies guys. I’ll try harder to inspect those wires under the dash and look at the wire insulation. I’ll definitely give feedback on what I find.

 

[Gregster613]

Thanks for your replies guys. I’ll try harder to inspect those wires under the dash and look at the wire insulation. I’ll definitely give feedback on what I find.

I'll sure be interested to learn whatever you find out is causing this! My 273 is a 2009 model and hasn't given me any pto problems - YET - but I'm always ears as to what "Might" be next to plague me! Thanks for any feedback!