2012412AM 4472803050 3P90396110 12V Auto Parts AC Compressor For Kubota WXTK178
Parameter:
| Model Number | WXTK178 |
| Car Model | For Kubota For M6 For M135 For Daihatsu For Hijet |
| Compressor model | SV07E 6PK |
| Type | Air Conditioner Compressor |
| Year Model | 2001-2014 |
| OE No. | 2012412AM/4472803050/3P90396110/4472803080/4472803050 |
Pictures
Testing the functionality of AC conditioning compressor
1. Visual Inspection
Check for Physical Damage: Inspect the compressor for cracks, leaks, or signs of wear on the housing, hoses, and connections.
Inspect Belts and Pulleys: Ensure the compressor belt is not worn, cracked, or loose. Check the pulley for smooth rotation and proper alignment.
Look for Oil Stains: Oil stains around the compressor or A/C lines may indicate a refrigerant leak.
2. Electrical System Check
Test the Clutch:
Turn on the A/C system and observe if the compressor clutch engages (you should hear a click and see the clutch plate move).
If the clutch does not engage, check the power supply, fuses, relays, and wiring for faults.
Measure Voltage: Use a multimeter to check the voltage at the compressor clutch connector. It should match the vehicle’s system voltage (typically 12V).
Check Ground Connection: Ensure the compressor has a proper ground connection.
3. Pressure Testing
Connect Manifold Gauges: Attach a manifold gauge set to the high-pressure and low-pressure service ports on the A/C system.
Measure Pressure:
Start the engine and turn the A/C to the maximum cooling setting.
Compare the pressure readings (low-side and high-side) with the manufacturer’s specifications.
Abnormal pressure readings (too high or too low) may indicate a problem with the compressor or other components (e.g., clogged expansion valve, refrigerant overcharge, or undercharge).
Check for Pressure Balance: Turn off the engine and observe if the high-side and low-side pressures equalize. If they do not, the compressor’s internal valves may be faulty.
4. Performance Test
Cooling Efficiency: Run the A/C system and measure the temperature of the air coming from the vents. It should be significantly cooler than the ambient temperature (typically 8–15°C or 45–60°F at the vents).
Listen for Unusual Noises: Strange noises (e.g., grinding, rattling, or squealing) may indicate internal compressor damage or bearing failure.
Monitor Compressor Operation: Ensure the compressor cycles on and off at regular intervals. Continuous operation or failure to cycle may indicate a problem.
5. Leak Testing
Use a Refrigerant Leak Detector: Check for leaks around the compressor seals, hoses, and connections.
UV Dye Test: Add UV dye to the refrigerant and use a UV light to detect leaks.
Soap Solution Test: Apply a soapy water solution to connections and look for bubbles, which indicate leaks.
6. Compressor Oil Level Check
Inspect Oil Level: The compressor requires the correct amount of oil for lubrication. Too little oil can cause overheating, while too much oil can reduce cooling efficiency.
Check for Contamination: If the oil appears dirty or contains metal particles, the compressor may be damaged internally.
7. Belt and Pulley Test
Belt Tension: Ensure the belt driving the compressor is properly tensioned. A loose belt can cause slippage, while an overtightened belt can damage the compressor bearings.
Pulley Rotation: With the engine off, manually rotate the compressor pulley to check for smooth operation. Resistance or grinding noises may indicate bearing failure.
8. Advanced Diagnostics
Scan for Error Codes: Use an OBD-II scanner to check for any A/C-related error codes stored in the vehicle’s computer.
Check Refrigerant Levels: Use a refrigerant scale to ensure the system has the correct amount of refrigerant. Overcharging or undercharging can affect compressor performance.
Common Issues to Look For
Compressor Not Engaging: Could be due to low refrigerant, electrical faults, or a faulty clutch.
Poor Cooling Performance: May indicate a failing compressor, low refrigerant, or a clogged system.
Excessive Noise: Often caused by internal compressor damage or bearing failure.
Refrigerant Leaks: Commonly occur at seals, hoses, or connections.
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2012412AM 4472803050 3P90396110 12V Auto Parts AC Compressor For Kubota WXTK178 Images
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