TM10-3930-660-20 17-4. REAR WINDSHIELD WIPER ASSEMBLY - REPLACE This task covers: a. Removal c. Installation Initial    Setup Tools Tool Kit, Automatic Mechanics Equipment  Condition Vehicle parked on level ground. Negative battery cable disconnected, Para.  8-44. Materials/Parts Lockwasher  (10) 1. REMOVE REAR WIPER ARM (1) AND REAR WIPER MOTOR (2) MOUNTING HARDWARE. a. b. c. Pry and remove wiper arm (1) from shaft  of  motor  (2). If necessary, remove nut (3) and wiper blade (4) from wiper arm (1) . Remove hex nut (5), and washer (6) . Leave fiber washer (7) on cab (8). Support motor (2) so it does not drop when mounting hardware in step “d” is removed. d. Remove screw (9) and lockwasher (10)  from  motor  (2).  Discard lockwasher  (10). 2. REMOVE REAR WIPER MOTOR (2) FROM CAB (8) AND DISCONNECT ELECTRICAL WIRING. a. Remove motor (2) from cab (8). 17-8