Servicing Air Conditioning System

CM053510037-UN-11FEB05

A - Receiver/Dryer

B - Evaporator/Heater Core

C - Fan

D - Gas High Pressure Switch

E - Compressor

F - High Pressure Indicator

G - Condenser

H - Recirculation Filter

I - Fresh Air Filter

CAUTION: Prevent possible injury from flying debris if compressed air is more than 2.1 bar—210 kPa (30 PSI). Reduce compressed air to less than 2.1 bar— 210 kPa (30 PSI) when using for cleaning purposes. Clear area of bystanders, guard against flying debris, and wear personal protection equipment including eye protection.

1. Use appropriate R134A refrigerant recovery, recycling, and charging machines. Do Not vent refrigerant into atmosphere.
2. Check tension of compressor belt.
3. Check compressor (E) clutch engagement.
4. Check evaporator heater core (B) for plugging.
5. Check fans (C) for proper operation.
6. Check condenser core (G) to see that it is not plugged with dirt or trash. Clean with compressed air less than 2.1 bar—210 kPa (30 PSI) or water when needed.

7. 
   CM023500080-UN-07FEB05

   
   CQ280253-UN-18FEB08

   Clean recirculation and fresh air filters. The recirculation filter (H) is located in the cab behind the training seat. The fresh air filter (I) is located outside of the cab next to the door. Use compressed air to reverse blow the filters. If either filter is worn, replace it.
8. Run air conditioning system for several minutes.
9. Check the sight glass located on receiver/ dryer (A) near radiator. Bubbles must not be present in sight glass. If bubbles are present, see your dealer for information on repairing and charging the air conditioning system.
10. Check high-pressure indicator in cab. If on, condenser may be plugged or system may be overcharged.

Item	Measurement	Specification
Refrigerant
R134A (Empty System)	Capacity	3.4 kg (7.5 lb)
R134A Compressor Oil: ND-8	Capacity	118 ml (4.0 oz)