TM 10-3930-659-20 16-12.    HEATER BLOWER MOTOR MAINTENANCE (Con't). b. DISASSEMBLY 1. Remove eight compression rings (18) from upper heater blower housing (14) and lower heater blower housing 2. Remove four screws (15) and upper heater blower housing (14) from lower heater blower housing (16). 3. Remove heater blower motor (17) from lower heater blower housing (16). 4. Remove two clamps (7) and impellers (8) from heater blower motor (17). 5. Remove two clamps (9) and retainer packings (10) from heater blower motor (17). 6. Remove brush cover (13), spring (12), and brush (11) from heater blower motor (17). c. CLEANING AND INSPECTION 1. Clean heater blower motor with a clean, dry rag. 2. Clean plastic parts with dishwashing compound and water, and dry with clean rags. TA707000 16-40