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Common issues

Suspension and axle bolt failures

Suspension and axle mounting bolts are subjected to shock and dynamic movement that can cause bolts to loosen, risking vehicle instability or failure.

Solution: Superbolt® Strut Kits simplify the preload process while resisting shock-induced loosening, enhancing vehicle safety. Our kits provide safe and consistent preload in critical suspension joints without high torque requirements.

Wear in pivot and chassis joints

Axle pivots, radius rods, and body joints wear down over time, creating slack and misalignment that affects steering and ride quality.


Solution: Expander® System pivot pins remove slack in pivot connections, eliminates pivot wear in axle and body connections, extends service life and removes the need for oversized repairs.

 

The Superbolt Tool allows for fast, safe, and consistent tightening of Superbolt tensioners on rope shovel side frame connections, improving serviceability in confined or high-load areas. 

Unsafe Bolting in Steering Linkages

Traditional bolted joints are not ideal for these applications. Torque-based tightening leads to inaccurate loading levels, causing torsion, galling, and harder removal. Combined with vibration and thermal cycling, this results in preload loss and potential failure of critical connections.

Solution:
Superbolt tensioners eliminate these issues by providing accurate, torsion-free tightening. They maintain precise preload across steering linkages and other dynamic joints, ensuring long-term reliability and easier maintenance.

 

Loosening of accessories

Smaller accessories like lights, mirrors, and handrails are prone to loosening due to continuous chassis movement and high-frequency vibration.

Solution: Nord-Lock® wedge-locking washers provide maintenance-free security for accessories, engine mounts, and frame bolts.

Case studies

Expander - CAT793B Expansion & Stabilizer Pins – Wyoming

Expander – Komatsu 930E Steering Pins – BC, Canada

Superbolt – Komatsu 830E & 930E Strut Kits – Wabush, Canada

Expander - CAT793

SMS Equipment uses Expander pins in new Komatsu haul truck assembly - Nord-Lock Group

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