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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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