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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-69. FAN BELT (EVAPORATOR MOTOR AND HOUSING ASSEMBLY).
This task covers:
Inspection
Adjust
Removal
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. Swing open control box (para 4-45).
INSPECTION
1. Check that belt is not cut, worn, frayed, or cracked. If belt is damaged, replace belt (see Figure 4-70).
2. At a point halfway between the motor pulley and fan pulley, press the belt with hand. Belt should not depress more
than 1/2 inch (1.3 cm). If belt is too loose, adjust belt tension.
ADJUST
1.
Loosen four locknuts (1).
2.
Reposition motor in appropriate direction to obtain proper tension.
3.
Tighten four locknuts (1).
4.
Check belt tension (INSPECTION step 2), above.
5.
Repeat steps 1 thru 4 until proper tension is obtained.
REMOVAL
1.
Loosen four locknuts (1).
2.
Move motor in proper direction to obtain sufficient slack in fan belt.
3.
Remove belt (3) from pulleys (2).
INSTALLATION
1.
Slip belt (3) onto pulleys (2).
2.
Perform steps 2 thru 5 in ADJUST procedure.
4-132
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