353-0487 353-0489 199-4559 Heavy-Duty Swing Bearings for Cat 30-36 Ton Excavators

Premium Swing Bearings for Cat 330 & 336 Series

In severe-duty mass excavation, quarrying, and forestry operations, your 30-to-36-ton excavators—such as the Caterpillar 330C, 336D, and 340DL—are subjected to extreme axial and radial stresses. When a swing bearing failure causes dangerous cab rocking, it halts your entire production line. We offer a comprehensive range of premium, heavy-duty slewing ring assemblies engineered to match the exact specifications of the Cat 330 and 336 series, restoring your machine's stable, 360-degree rotational power immediately.

Crucial Fitment: Standard vs. Heavy-Duty (HD) Configurations

Caterpillar 36-ton class excavators utilize specific swing bearings based on their undercarriage and application build. These part numbers are NOT universally interchangeable. We ensure you get the exact match:

• For Standard & Long (L) Undercarriages: The 353-0487 (cross-references with 227-6089) is the standard heavy-duty replacement for general earthmoving models like the 336D and 336D2.

• For Heavy-Duty (HD), Forestry (FM) & Mass Excavation: The 353-0489 (cross-references with 199-4658 and 227-6093) features a reinforced structure designed specifically for severe-duty machines like the 336DL HD, 340D2L, and 568FM.

• For Legacy 330 Models: We also support exact drop-in replacements for earlier iterations using part number 199-4559.Please consult our sales engineers with your machine's serial number to verify the exact pinion mesh and bolt-hole configuration before ordering.

Built to Endure Mass Excavation Loads

Whether you are loading rigid haul trucks in a quarry or handling massive timber in forestry applications, our swing bearings are built for survival. Manufactured with deep-induction hardened raceways and premium-grade rolling elements, our assemblies prevent premature spalling and gear stripping. Equipped with industrial-grade environmental seals, they lock essential grease in while completely blocking out destructive rock dust and debris, guaranteeing thousands of hours of reliable operation.