Faults in the front‑axle steering system of construction machinery are mostly caused by kingpin wear, looseness and jamming. Mismatched replacement parts are a common headache in the repair industry. Incorrect kingpin repair kits lead to high rework rates, accelerate axle wear and threaten operational safety. Shaanxi St. Bernard Construction Machinery Co., Ltd. specializes in construction machinery spare parts. We offer two types of 5.5‑ton drum‑brake front‑axle steering knuckle kingpin repair kits for old and new axle versions to eliminate part‑selection errors.

For 5.5‑ton drum‑brake front axles, our two repair kits feature clear specifications and reliable quality. The standard model, Part No. XLB‑55T, adopts Φ47*240 kingpin with lock pin hole. It fits pre‑B150603002 serial‑number 5.5‑ton drum‑brake front axles, fully complying with original factory dimensions for seamless installation.

The improved upgraded model, Part No. XLB‑55T‑A, comes with optimized Φ47/48*234 kingpin without lock pin hole. It is designed for 5.5‑ton drum‑brake front axles with serial number after B150603002, delivering better fit and stable performance for revised axles.

Note: Both kits apply only to standard 5.5‑ton drum‑brake front axles and are not suitable for axle units with bearing‑unit structure. Match parts according to your axle production serial number to avoid wrong fitting. Manufactured to original‑factory standards with wear‑resistant materials, our kits resolve steering looseness, pulling and abnormal noise, and extend axle service life. Adequate stock and stable supply make us a trusted supplier for repair shops and fleet maintenance teams.