High-Quality Replacement Driveline Parts by — PTC Drivelines
PTC 1029 is manufactured as a cross-reference equivalent to Komatsu 421-20-12620, used within the propeller shaft assembly of large wheel loaders operating in mining, quarry and heavy construction environments. The cross body is forged from alloy steel and processed through a controlled carburising cycle, producing a hardened outer surface while preserving core toughness to absorb the torque fluctuations typical of loader driveline operation during bucket cycling and directional shifts. Trunnion journals are precision ground so needle bearings seat evenly, minimising the uneven wear that shortens spider life under repeated loading.
Sealed with a self-locked bearing cup and three-stage barrier system, PTC 1029 retains factory-filled grease while keeping out dust and moisture common on unpaved work sites. This reduces reliance on frequent manual lubrication during scheduled servicing. Manufactured under ISO 9001:2015 quality management with dimensional verification according to Komatsu WA470 / WA480, PTC 1029 is designed to integrate into existing WA-series driveline assemblies without additional machining or fitment adjustment at the workshop.
Other driveline components from PTC Drivelines compatible with the Komatsu WA500-3.
Whether you need OEM-compatible spare parts for your mining fleet, a reliable export supply partner, or want to become a regional distributor — our team is ready to help within 24 hours.
If the required part number is not listed in our product range, simply share the part number, drawing, dimensions, or technical specifications with us. Our team can review your requirement and manufacture the part to your preferred specifications.