I have a Curtis enclosure for my John Deere. It is exceptional! My problem is the wiper arm and blade flys off the drive shaft after cycling 4 or 5 times. There is a flat spring on the arm head that looks to be designed to lock in a detent on the drive shaft/gear. I cannot figure out why it continues to come off the shaft when I operate the wiper. The must be a simple answer. Dick Mooneys@aol.com or 231 865 1254
