1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your TORQUE Air Spring Bag, model TR8852. This air spring is designed for Peterbilt trucks and serves as a replacement for various OEM part numbers. Adhering to these instructions will help ensure optimal performance and longevity of the product.
2. Important Safety and Fitment Information
WARNING: Incorrect part selection can lead to product failure and serious accidents. Always verify the correct part number for your vehicle.
Image: Warning regarding the importance of verifying the correct part number with your dealer and VIN to prevent air bag failure.
It is crucial to confirm that this air spring is the correct replacement for your specific vehicle application. Do not rely solely on vehicle make and model. Consult your dealer and provide your Vehicle Identification Number (VIN) to obtain the precise part number required. Alternatively, compare the detailed specifications and diagrams provided in this manual with your existing air bag.
Replacement Part Numbers:
- Firestone: 8852, W01-358-8852, W013588852
- Goodyear: 1R12-568, 1R12568
- Peterbilt: 03-07887 (Low Air Leaf), 0307887 (Low Air Leaf)
- Contitech: 9 10-19 P 472, 91019P472
- Triangle: AS-8472
- Automann: 566.ER8852
- Other references: AS8852, HDV8852, HD8852, Sampa SP558852-KP
3. Product Specifications
The TORQUE Air Spring Bag TR8852 is engineered with robust materials and precise dimensions to meet or exceed OEM requirements.
Image: A side view of the TORQUE Air Spring Bag TR8852, showing its overall construction and top plate with engraved part number.
General Dimensions:
- Extended Height: 23.60 inches
- Compressed Height: 6.80 inches
- Top Plate Width: 9.00 inches
- Piston Width: 10.25 inches
- Item Weight: 13.20 lbs (product only), 13.67 lbs (shipping)
- Package Dimensions: 16 x 10.5 x 10.04 inches
Image: Technical diagram illustrating the side view dimensions of the air spring, including extended and compressed heights.
Image: Bottom view of the air spring, highlighting the piston and the central mounting stud.
Material and Construction:
- Rubber Thickness: 4.5 - 5.00 mm, exceeding OEM requirements.
- Studs: 25% stronger 4140 grade steel studs.
- Pistons: Stronger composite pistons.
- Quality Assurance: Highest leak test ratio after final assembly.
- Durability: 10 million cycle tested to ensure highest quality and maximum longevity.
4. Installation
Installation of air spring bags should be performed by qualified personnel with appropriate tools and safety equipment. Refer to your vehicle manufacturer's service manual for specific procedures and torque specifications.
General Installation Steps (Consult Vehicle Manual for Details):
- Safety First: Park the vehicle on a level surface, engage the parking brake, and block the wheels. Use jack stands to support the vehicle frame securely.
- Depressurize System: Release all air pressure from the air suspension system.
- Remove Old Air Spring: Disconnect air lines and mounting hardware. Carefully remove the old air spring.
- Inspect Mounting Surfaces: Clean and inspect the upper and lower mounting surfaces for damage, corrosion, or debris.
- Install New Air Spring: Position the new TORQUE Air Spring Bag. Connect the air lines and secure all mounting hardware according to vehicle manufacturer specifications. Ensure all connections are tight and free of leaks.
- Inflate System: Slowly inflate the air suspension system and check for proper seating and any air leaks using a soapy water solution.
- Final Check: Lower the vehicle, remove jack stands and wheel blocks. Test the suspension system for proper function and ride height.
5. Operating Guidelines
Once installed, the air spring system will automatically adjust to maintain the desired ride height and support the vehicle's load. Ensure the air pressure is within the recommended range for your vehicle's load conditions. Avoid overloading the vehicle beyond its Gross Vehicle Weight Rating (GVWR).
6. Maintenance
Regular inspection and maintenance are essential for the longevity and safe operation of your air spring system.
Recommended Maintenance:
- Visual Inspection: Periodically inspect the air springs for signs of wear, cracks, abrasions, or damage. Check for any visible air leaks around the connections.
- Air Line Inspection: Ensure air lines are free from kinks, chafing, or damage.
- Mounting Hardware: Verify that all mounting bolts and nuts are secure and torqued to specifications.
- Cleanliness: Keep the air springs and surrounding areas free from dirt, debris, and corrosive materials.
7. Troubleshooting
If you experience issues with your air spring system, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Air spring not inflating | Air leak, faulty air compressor, blocked air line, faulty height control valve. | Check for leaks with soapy water, inspect compressor and air lines, test height control valve. |
| Vehicle leaning or uneven ride height | Uneven air pressure, faulty height control valve, damaged air spring. | Check air pressure in each air spring, inspect height control valve, visually inspect air springs for damage. |
| Excessive vibration or harsh ride | Incorrect air pressure, worn shock absorbers, damaged air spring. | Adjust air pressure to recommended levels, inspect shock absorbers, check air springs for damage. |
For complex issues or if you are unsure about diagnosis or repair, it is recommended to consult a professional mechanic or your vehicle's service center.
8. Warranty and Support
TORQUE Parts offers an industry-leading 3-year unlimited mile warranty on its rolling lobe/reversible sleeve air springs, including the TR8852 model. To activate your warranty, please register your air spring through the official Torque Parts website after purchase.
Product Quality Assurance:
Video: An overview of AftermarketUS, the official distributor of Torque Parts, highlighting the range of products and the 3-year warranty on air springs, along with quality testing processes.
For further assistance, technical support, or warranty claims, please refer to the contact information provided on the Torque Parts website or contact your authorized dealer.
