Link, a Tier-1 supplier to major heavy-duty commercial truck and fire truck manufacturers, announced the introduction of enhanced severe-duty bushings and torque rods for Air Link suspension systems rated between 46,000 and 52,000 pounds. The new bushings feature a proprietary rubber compound and optimized geometry developed specifically to extend component life in demanding fire apparatus environments.

Beginning with production units delivered after October 31, 2025, all Air Link suspensions within the 46K-52K capacity range will be equipped with the enhanced bushings as standard equipment. Aftermarket bushing and torque rod service kits are available immediately for retrofits and field replacements.

Improving Durability Under Extreme Braking, Acceleration, and Articulation Events

The modified rubber bushing design addresses critical wear patterns observed in intense applications. The double-bonded construction—with rubber bonded directly to both the inner and outer metal surfaces—eliminates bushing friction and substantially reduces wear at all pivot connections. 

This bonded design maintains optimal clamp load throughout the bushing’s service life, improving joint reliability and preserving alignment integrity across all three bushing locations: the axle end connections, the hanger bracket pivot and the walking beam center position.

Link backs the new upgraded bushings with extended warranty coverage, now doubled from one year to two years.

The new bushings are fully interchangeable with previous designs, maintaining identical form, fit and function. No new training or modified installation procedures are required, ensuring seamless integration for both OEM production and aftermarket service applications. Proper clamp force and use of correct adjoining components remain essential for optimal bushing performance.

Withstanding Extreme Duty Cycles While Maintaining Performance

The available severe-duty torque rods are engineered for suspensions rated between 46,000 and 60,000 pounds, aimed at delivering measurable performance gains while maintaining precise axle positioning during acceleration and braking. 

Permanently lubricated spherical ball ends eliminate the need to clock ends to prevent rubber windup, and the double-adjustable design allows for exact length adjustments without shims. Combined with new bushing technology, the advanced rod design enhances pivot connection integrity, extends bushing life and reduces maintenance requirements.

Link is currently developing severe-duty bushings for Air Link suspensions rated at 60,000 pounds and above, targeted for introduction in early 2026.