You are not the only one who has this problem. My 125 that I recently purchased (I'm a first time Cub owner) has this problem with the right mule drive pulley arm (the one that has the spring). I have the quick attach mower deck lift assembly. I have been having problems with the mule drive belt jumping off. I don't know for sure if it is jumping off the spindle on the mower deck or if it is jumping off the mule drive pulleys, but I think my belt is old and has a lot of wear. I posted a "before" pic which was taken looking up from the ground towards the front PTO, and an after pic taken from the front. I used two hose clamps to hold an old screwdriver against the front of the right pulley arm.
My particular problem is that the pulley arm has eaten into the horizontal rod as a result of the twisting of the arm due to the spring vs. the belt. My fix has been able to force it back into a better position so far; I have still had the belt jump sometimes, but I have been able to mow my yard.
|