Cub Cadet 1525 problems

[mlewis]

I recently purchased a used 2005 Cub Cadet 1525. The tractor is in great shape overall but I am having trouble with the PTO I believe. The blades will disengage after about 20 minutes of mowing. Once they go off, I can re-engage them but then they will disengage every 1-2 minutes. Here is the really strange part. If I sit stationary, the blades will stay engaged. Also, I noticed they will also stay engaged if I only mow at about 1/2 of full throttle or less. If I press the pedal past about 1/2 way the blades disengage again. Also, the blades now stay engaged when I go in reverse, when before the reverse safety switch would disengage them automatically. I ruled out (right or wrong) this being a seat switch problem since it doesn't present itself during the first 20 minutes on the same terrain etc.
I am getting pretty frustrated having to continuously push in/pull out the PTO switch while I mow, or having to mow so slow.
Any help/suggestions on this would be greatly appreciated. Thanks!

 

[CubUser]

How old is the battery? I'd replace it with a new one if it's more than a year old and see if that doesn't fix the problem.

 

[mlewis]

Thanks! I'll give that a try and see what happens.

 

[OldMachinist]

Since you said the reverse cut out isn't working anymore I'd look at the switch and its wiring. It may have come loose or the wiring may have a rubbed spot shorting out.