TM 10-3930-659-20 16-3. DEFROSTER FAN MAINTENANCE (Con't). 3. Remove front blade guard (20) from rear blade guard (17). 4. Loosen setscrew (18) and remove fan blade (19) from motor (26). 5. Remove two locknuts (21), rear blade guard (17) and motor (26) from bracket (16).  Discard locknuts. 6. Remove lockwasher (22) and terminal lead (23) from motor (26).  Discard lockwasher. 7. Remove lockwasher (24) and washer (25) from motor (26).  Discard lockwasher. 8. Remove electrical tape and wire mesh shielding (15) from insulation tube (14). 9. Remove insulation tube (14) from two wires (13). TA706972 16-9