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Page Title: 4-73. PULLEYS 50 HZ, RED (EVAPORATOR MOTOR AND CIRCULATOR FAN).
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ARMY TM 9-4120-381-14 NAVY EE-000-CA-MMA-010/7053-AC AIR FORCE TO 35E9-136-31 4-73.  PULLEYS 50 HZ, RED (EVAPORATOR MOTOR AND CIRCULATOR FAN). This task covers: Inspection Removal Adjust Installation INITIAL SET-UP: Tools: Tool kit, service, refrigeration unit (Item 1, Appendix B) Personnel: 1 Equipment Conditions: Disconnect input power to the air conditioner before performing any internal maintenance.  Voltages used can KILL.  Shutting the unit off at the control panel does not disconnect unit power. 1.  Disconnect air conditioner input power at source. 2.  Remove right front evaporator panel (para 4-25). 3.  Swing open control box (para 4-45). INSPECTION 1. Check  evaporator  motor  and  circulator  fan  pulleys  diameter  measures  4  3/4  inches  (12.1  cm).    If  pulleys measurement are not correct, install correct pulley.  (See Figure 4-74) 2. Check pulleys for dents, burrs or any damage that would cause interference with fan operation.  Replace pulley, if damaged. REMOVAL NOTE To remove pulleys mounted on inside of cabinet, remove nut, lockwasher, small flat washer, large flat washer, and pulley. 1. Circulator Fan Pulley (Evaporator) a. Remove fan belt (para 4-69). NOTE Bolts are used as pulley remover devices. b. Match mark position of pulley on shaft (4). c. Remove two bolts (6) and screw into threaded holes (5). d. Tighten two bolts (6) and remove pulley (7). 2. Evaporator Motor Pulley. a. Match mark position of pulley on shaft (3). b. Loosen three set screws (2) (two on front and one on rear). c. Remove pulley (1). 4-141

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