TM 10-3930-659-20 16-3. DEFROSTER FAN MAINTENANCE (Con't). 10. Remove  locknut  (32),  screw  (34),  four  washers (33),    and    bracket    (16)    from    bracket    (29). Discard locknut. 11. Remove locknut (31), washer (30), bracket (29), nylon washer (28), and bolt (27) from defroster fan base (11).  Discard locknut. c. ASSEMBLY _I 1. Install nylon washer (28) and bracket (29) on defroster fan base (11) with bolt (27), washer (30), and new locknut (31) 2. Install bracket (16) on bracket (29) with four washers (33), screw (34), and new locknut (32). 3. Install insulation tube (14) over two wires (13). 4. Install wire mesh shielding (15) on insulation tube (14) with electrical tape. 5. Position washer (25), terminal lead (23), and two new lockwashers (22 and 24) on motor (26). 6. Install bracket (16) and rear blade guard (17) on motor (26) with two new locknuts (21). 7. Position fan blade (19) on motor (26) and tighten setscrew (18). 8. Attach front blade guard (20) to rear blade guard (17). TA706973 16-10