TM 10-3930-659-20 16-15.    HEATER VENTILATORS AND DUCT HOSES REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Tools/Test Equipment: •    Right access door opened (see TM 10-3930- • General mechanic's tool kit (Item 44, Appendix F) 659-10). •    Cab fresh air filter door opened (see TM 10- 3930-659-10). References: •    Cab rear panel removed (see paragraph 14-22). • TM 10-3930-659-10 •    Seat assembly and seat support removed (see paragraph 14-25). a. REMOVAL NOTE Perform steps 1 through 5 to remove heater ventilators and duct hoses from cab. 1. Loosen two hose clamps (2) and remove duct hose (3) from louver housing (1) and duct (4). 2. Remove two hose clamps (2) from duct hose (3). TA707010 16-50