VKNTECH Air Spring 4154NP05 Replacement for Goodyear 1R12-069 and Firestone W01-358-9069 Suspension Systems

This heavy-duty air spring (4154NP05) serves as a reliable replacement component for commercial vehicle suspension systems. Manufactured by VKNTECH, it offers compatibility with multiple OEM brands including Contitech, Goodyear, and Firestone.

Replaces: Peterbilt 03-02456, 03-04759, 03-01649, 03-06746, 03-07112, 03-02038 (Air-Trac), 03-10042

Cross References: 1R12069, E1R12069, 1R12669, 1T15K4, 1T15M4, 566243038, 8312, 352-9069, 554764C1, SC2034, AS506-9069, AS504-9069, AS-0077, 64274, 9 10-14 P 312, W013589069, C816022

• Inspect air lines and devices for leaks and ensure they turn freely
• Check bellows bearing for damage, proper fastening, deformation, and sharp edges
• Verify shock absorber operation, impermeability, tightness, and bearing
• Periodically check nuts and bolts for proper torque (refer to manufacturer's manual)
• Inspect axle suspension, trailing arms, and rods for wear
• Ensure height control valve functions properly to reduce maintenance expenses

• Gather all necessary tools and equipment for safe repair
• Review manufacturer's service guide for your specific suspension system
• Consult qualified suspension specialists if uncertain about any procedure

• Check leveling valve, linkage, and transmission parts for wear and damage
• Inspect shock absorbers for leaks and perform functionality tests
• Examine air lines for cracks or damage along their entire length
• Inspect frame hangers, trailing arm bushings, torque rods, and air spring mounts
• Clean air spring mounting plates before installing new units
• Always use new attaching bolts and observe specified tightening torques
• Verify leveling valve linkage functions properly under load conditions