TM 10-3930-659-20 16-13.    INSIDE CAB HEATER HOSES AND HEATER CONTROL VALVE REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Tools/Test Equipment: Engine cooling system drained (see paragraph General mechanic's tool kit (Item 44, Appendix F) 5-38). Cab fresh air filter door opened (see TM 10-3930- References: 659-10). TM 10-3930-659-10 a. REMOVAL 1. Loosen  two  clamps  (2)  and  remove  hoses  (3 and 4) from nipples (1). 2. Remove two nipples (1) from cab floor (5). TA707003 16-43

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