| Description | Air Compressor 1 Cylinder For Cummins |
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| Condition | New |
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| Brand | Bendix® |
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| Part Number | KN13040X, KN13040 |
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An Air Compressor is typically used on heavy-duty trucks, buses, and some industrial diesel engines. Its job is to generate compressed air for the vehicle's air brake system and other pneumatic accessories.
1. Air Brake Operation
- Provides the compressed air required to apply and release the brakes.
- Maintains safe operating pressure in the brake system.
- Essential for vehicle safety and legal operation.
2. Air Suspension Systems
- Supplies air to air-ride suspension components.
- Helps maintain ride height and improves ride comfort.
- Supports load leveling on commercial vehicles.
3. Pneumatic Accessories
The compressor can provide air for:
- Air horns
- Air-operated doors
- Pneumatic seats
- Clutch and transmission controls on some vehicles
- Other air-powered equipment
4. Maintaining System Pressure
- Continuously replenishes air lost during normal operation.
- Works with an air governor and air dryer.
- Automatically loads and unloads as system pressure changes.
Benefits of Using a TF-550
- Reliable air supply for critical systems.
- Durable design suitable for heavy-duty service.
- Helps reduce vehicle downtime.
- Supports safe braking performance.
- Commonly available replacement parts and service support.
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Signs of Faulty
1. Slow Air Pressure Build-Up
What you'll notice
- Air gauges take much longer than normal to reach operating pressure.
- The low-air warning stays on for an extended time after startup.
Possible cause
- Worn piston rings
- Leaking valves
- Internal compressor wear
2. Low Air Pressure
What you'll notice
- Air pressure never reaches the normal operating range.
- Frequent low-air pressure alarms.
Possible cause
- Compressor cannot produce enough airflow.
- Internal leakage or damaged components.
3. Excessive Oil in the Air System
What you'll notice
- Oil found in air tanks.
- Oil contamination in the air dryer.
- Oily discharge when draining air tanks.
Possible cause
- Worn piston rings or seals allowing engine oil to pass into the compressed-air system.
4. Compressor Runs Continuously
What you'll notice
- Compressor rarely unloads.
- Engine may seem to work harder than usual.
Possible cause
- Compressor is struggling to maintain pressure.
- Internal wear reducing efficiency.
5. Unusual Noises
What you'll notice
- Knocking
- Grinding
- Squealing
- Rattling sounds from the compressor area
Possible cause
- Worn bearings
- Damaged pistons
- Internal mechanical failure
6. Air Dryer Purges Excessively
What you'll notice
- Frequent air dryer cycling.
- Irregular pressure fluctuations.
Possible cause
- Compressor output problems or air system issues.
7. Overheating
What you'll notice
- Compressor becomes excessively hot.
- Burnt smell near the compressor.
Possible cause
- Restricted cooling passages
- Poor lubrication
- Excessive duty cycle
8. Air Leaks from Compressor Area
What you'll notice
- Hissing sounds around the compressor.
- Visible leaks at fittings or gaskets.
Possible cause
- Failed gaskets
- Loose fittings
- Cracked components
9. Excessive Moisture in Air Tanks
What you'll notice
- More water than usual when draining tanks.
- Reduced air dryer effectiveness.
Possible cause
- Compressor overheating or reduced efficiency.
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Bendix®, a part of the Knorr-Bremse Group and headquartered in Elyria, Ohio, is an American company specializing in the production of safety systems and braking systems for commercial vehicles. Employing over 3,200 people, Bendix® is committed to its vision of becoming the leading worldwide supplier of active vehicle safety systems within the commercial vehicle industry. With a focus on innovation, Bendix® takes pride in introducing groundbreaking technologies such as air dryers, air compressors, and ABS to the North American market, setting high standards for the industry and ensuring road safety and reliability for trucks, buses, trailers, and other commercial vehicles.
