I replaced the trans.belt on my LT1050 & before I reinstalled the mower deck I wanted to see if the PTO would engage.I pulled the PTO switch & nothing happened. When I put the PTO back on I made sure the key went into the keyway on the shaft & the slotted tab on the PTO ass'y.had the yellow bracket in the slot,as I THINK that's the way it must go,but I'm not sure??