08-24-2025, 07:29 PM
System Overview
The Caterpillar 279D compact track loader is equipped with an air conditioning system designed to improve operator comfort in various climates. This system includes components that efficiently cool and circulate air in the operator cab while maintaining machine performance and reliability.
Key Components
The system uses R134a refrigerant, a common environmentally friendlier refrigerant, with a Global Warming Potential (GWP) of 1430.
Maintenance Tips
The Caterpillar 279D’s air conditioning system is thoughtfully designed to enhance operator comfort while complying with environmental regulations. Regular maintenance including filter changes, refrigerant checks, and cleaning of heat exchangers ensures the system performs efficiently through diverse operating conditions on the job site.
The Caterpillar 279D compact track loader is equipped with an air conditioning system designed to improve operator comfort in various climates. This system includes components that efficiently cool and circulate air in the operator cab while maintaining machine performance and reliability.
Key Components
- Compressor: The heart of the air conditioning system compresses the refrigerant gas, turning it into a high-pressure, high-temperature gas to circulate through the system.
- Condenser: Located near the radiator, the condenser dissipates heat from the compressed refrigerant by transferring it to the ambient air, causing the refrigerant to condense into a high-pressure liquid.
- Expansion Valve: Controls the flow of refrigerant into the evaporator, allowing it to expand and cool.
- Evaporator: Situated inside the cab, the evaporator takes the high-pressure liquid refrigerant and allows it to evaporate into a low-pressure gas, absorbing heat from the cab air and cooling the interior.
- Blower Fan: Circulates air over the evaporator coils and into the cab to distribute cooled air.
- Controls: Operators can adjust temperature and fan speeds for optimal comfort using user-friendly controls.
The system uses R134a refrigerant, a common environmentally friendlier refrigerant, with a Global Warming Potential (GWP) of 1430.
Maintenance Tips
- Replace Filters: Regular replacement or cleaning of the cabin air filters ensures good airflow and prevents debris buildup.
- Check Refrigerant Levels: Maintaining proper refrigerant levels is critical for cooling efficiency. Low coolant levels lead to inadequate cooling.
- Inspect Belts and Hoses: Regular inspection for wear prevents leaks and inefficient operation.
- Clean Condenser and Radiator: Keeping heat exchangers clear of dirt and debris aids efficient heat dissipation.
- The cab offers HVAC capabilities including heating, ventilation, and air conditioning.
- Optional high-back heated and air-ride seats complement climate control for a comfortable work environment.
- The enclosed ROPS cab improves insulation from noise and weather elements.
- The air conditioning system operates in concert with engine operation, factoring in parameters like engine coolant temperature.
- The cooling system fluid capacity is approximately 3.7 gallons (14 liters).
- Electrical system supports an 80-amp alternator providing power for A/C and other accessories.
- Compressor: Device in A/C system that pressurizes refrigerant gas.
- Condensation: Process where refrigerant releases heat and converts from gas to liquid.
- Evaporation: Refrigerant absorbs heat inside the cab, cooling the air.
- Refrigerant R134a: Environmentally regulated gas used in air conditioning.
- Global Warming Potential (GWP): Measure of how much heat a greenhouse gas traps in the atmosphere.
The Caterpillar 279D’s air conditioning system is thoughtfully designed to enhance operator comfort while complying with environmental regulations. Regular maintenance including filter changes, refrigerant checks, and cleaning of heat exchangers ensures the system performs efficiently through diverse operating conditions on the job site.
