TM  10-3930-669-20 NOTE Tag and mark all wires prior to removal. (3)   Remove  three  wires  (7,  8,  and  9)  from  wiper motor assembly (10). WARNING Wiper motor will drop when mounting is removed. Support wiper motor   assembly   during   removal   to prevent    damage    to    equipment    or injury to personnel. (4)   Remove two screws (11), lock washers (12), and wiper  motor  assembly  (10)  from  cab  roof  (6). Discard lock washers. b.  Installation. (1)   Install wiper motor assembly (10) on cab roof (6) with two lock washers (12) and screws (11). (2)   Install three wires (7, 8, and 9) on wiper motor assembly (10). (3)   Install  flange  (4)  and  nut  (5)  on  drive  shaft  (3) and cab roof (6). (4)   Install  wiper  arm  assembly  (2)  on  driveshaft  (3) with nut (1). NOTE Follow-on Maintenance: • Close cab door (TM 10-3930-669-10). • Connect batteries (Para 7-48). • Remove wheel chocks (TM 10-3930-669-10). END OF TASK 16-13