Water Pump V-Belt; Standby Motor - Compressor V-Belt Diesel Engine - Compressor V-Belt; Pumping Down The Unit Or Removing Refrigerant Charge; Figure 5.6 Water Pump Belt - Idler Retaining Nut - Carrier Supra 950MT Operation & Service Manual

5.3.4

Water Pump V-Belt

The water pump v-belt is driven by a sheave on the engine crankshaft. Frayed, cracked or worn belts must be
replaced. This belt requires no tension adjustment.
To Replace the Poly V-belt:
a. Ensure the unit will not start automatically by disabling any two way communication and placing the RUN/
STOP switch in the OFF position. Disconnect the high voltage source and lockout/tagout the receptacle.
b. Using the proper size socket, slowly rotate the crank by turning the crank pulley nut. At the same time, use a
flat, blunt object to guide the belt of the crank pulley. Be careful not to damage grooves on the pulley.
c. Replace the poly V-belt by positioning the belt on the water pump pulley, and while rotating the engine, use a
flat, blunt object to guide the belt onto the crank pulley. Be careful not to damage grooves on the pulley or belt.
5.3.5

Standby Motor - Compressor V-belt Diesel Engine - Compressor V-belt

Tension is realized by moving idler pulley:
• UPWARDS (Engine/Compressor)
• DOWNWARDS (Standby/Compressor)
5.4

PUMPING DOWN THE UNIT OR REMOVING REFRIGERANT CHARGE

To avoid damage to the earth's ozone layer, use a refrigerant recovery system whenever removing
refrigerant.
WARNING
!
Beware of moving poly V-Belt.
WARNING
!
When working with belts, beware of pinch points.

Figure 5.6 Water Pump Belt - Idler Retaining Nut

NOTE
5-9
Idler Retaining Nut
62-11863