RC.600.129 10S17C Auto AC Compressor for Caterpillar 310/320 Tractor BL Pulley 1A 24V WXTK005

1. Cooling Performance Issues

• Gradual loss of cooling capacity over time
• Intermittent cold air production
• Complete failure to cool (hot air only)
• Longer time required to reach desired cabin temperature

2. Audible Warning Signs

• Loud metallic grinding noises during operation
• High-pitched squealing when engaging
• Clicking sounds during clutch activation
• Unusual rattling or vibration noises
• Bearing growling sounds at idle

3. Visual Indicators

• Visible refrigerant oil leaks around compressor seals
• Excessive clutch pulley wobble
• Dark/discolored refrigerant oil (normal color is clear/light yellow)
• Physical damage to compressor housing
• Corroded or damaged electrical connections

4. Operational Abnormalities

• Compressor clutch fails to engage
• Frequent cycling (rapid on/off operation)
• Excessive vibration felt in cabin
• Burning smell from A/C vents
• Engine strain or RPM drop when A/C engaged

5. System Pressure Symptoms

• Abnormal high-side pressure readings
• Low-side pressure not reaching proper levels
• Pressure equalization problems
• Fluctuating gauge readings

6. Secondary System Effects

• Foggy windows due to poor humidity removal
• Unpleasant musty odors from vents
• Reduced defroster performance
• Illuminated A/C warning light (in newer vehicles)

Immediate Action Recommended When Noticing:

• Any metallic grinding noises
• Complete cooling failure
• Visible refrigerant leaks
• Electrical burning smells