TM 5-4120-287-15 1 Thermostatic expansion valve 2 Evaporator inlet distributor 3 Evaporator outlet manifold tube 4 Evaporator filter clean indicator pressure sensing tube 5 Evaporator air inlet filter 6 Evaporator assembly 7 Recirculating air door link 8 Recirculating air door 9 Vent air door control knob recessed panel 10 Air circulation control link 11 Connector link 12 Vent air door link 13 Vent air door 14 Evaporator blower scroll 15 Evaporator blower wheel 16 Evaporator blower shroud Figure 1-7--Continued. Figure 1-8.  Identification plates. Table 1-1.  Torque  Requirements Aluminum tubing Steel tubing Tube size OD (inches) Nut size Minimum (ft-lb) Maximum (ft-lb) Minimum (ft-lb) Maximum (ft-lb) 0.250 9/16 in. 40 60 135 150 0.375 11/16 in. 150 200 --- --- 0.500 7/8 in. 250 350 --- --- 0.625 1 in. 200 350 350 400 0.750 1-1/4 in. 300 500 350 400 1-15