TM 10-3930-659-20 16-9. WINDOW WASHER ASSEMBLY REPLACEMENT (Con't). 7. Remove two pumps (7), elbows (10 and 11), and cap (4) from tank (3). 8. If plate (1) is damaged, remove two screws (13) and plate from engine frame (14). NOTE Steps  9  through  11  are  performed  at rear of cab. 9. Remove two screws (18), lockwashers (17), and window  wiper  arm  cover  (19)  from  cab  (16). Discard lockwashers. 16-29