TM 10-3930-669-20 16-4. TOP WINDSHIELD WIPER ASSEMBLY REPLACEMENT. This task covers: a.   Removal b.   Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials / Parts Tags, Identification (Item 21, Appendix C) Washer, Lock (2) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Cab door opened (TM 10-3930-669-10) Batteries disconnected (Para 7-48) a. Removal. WARNING Wiper arm is spring loaded and could cause injury during removal. (1)   Remove nut (1) and wiper arm assembly (2) from drive shaft (3). (2)   Remove flange (4) and nut (5) from drive shaft (3) and cab roof (6). 16-12