TM 10-3930-659-20 16-6. FRONT WINDSHIELD WIPER ARM, BLADE, AND MOTOR MAINTENANCE. This Task Covers: a.  Wiper Arm Blade Replacement c. Installation b.  Removal Initial Setup: Equipment Conditions: Materials/Parts: • Battery disconnect switch in OFF position • Marker tags (Item 33, Appendix C) (see TM 10-3930-659-10) • One locknut • Lower dash cover removed (see paragraph • One lockwasher 14-23). Tools/Test Equipment: References: • General mechanic's tool kit (Item 44, •TM 10-3930-659-10 Appendix F) a. WIPER ARM BLADE REPLACEMENT 1. Remove  locknut  (2),  nozzle  (3),  and  wiper  arm blade    (1)    from    windshield    wiper    arm    (4). Discard locknut. 2. Install  wiper  arm  blade  (1)  on  windshield  wiper arm (4) with nozzle (3) and new locknut (2). TA706981 16-19