Used Pivot Joints for Construction Equipment

Boom Pivot Joint: the Part Supporting the Offset

On a mini excavator such as a Kubota KX080-4 or a Caterpillar 305C, the pivot joint connects the boom foot to the turret chassis. It receives the swing cylinder, which rotates it to dig along walls. On compact wheeled excavators, it plays the same role at the turret end. On a backhoe loader like the JCB 3CX or Case 580SLE, it is the rotation point for the rear excavator arm. In all cases, it absorbs digging forces and lateral shocks.

Pivot Joints in Stock by Equipment Type

• Mini Excavators: Caterpillar 302.5 to 308E2CR pivot joints, Kubota KX080-4 and U36-4, Yanmar VIO45 and B50, Hitachi ZX48, JCB 85Z, Volvo ECR88D.
• Wheeled Excavators: Komatsu PW95 and PW98MR-8, Liebherr A311 and A912 Compact, New Holland MH3.6.
• Backhoe Loaders: JCB 3CX, Case 580SLE.
• Articulated Dump Trucks: Caterpillar 725 to 735B, Volvo A25D to A35G pivot joints.
• Compactors and Loaders: Caterpillar CC4.0 and CB535B, Liebherr L526.
• By Brand: Hitachi pivot joints, Case, Yanmar, O&K, Caterpillar.

Central Pivot Joint: the Articulated Dump Truck's Hinge

On an articulated dump truck, the central pivot joint connects the tractor front to the dumper body. It allows steering and lets the two parts oscillate relative to each other, keeping the wheels on the ground on rough terrain. This is a heavy-duty part, constantly under load. The same principles apply to compactors and articulated loaders, where the central pivot joint also handles the lifting arm forces. Discover all our articulated dump truck parts sorted by model, along with brand pages for Caterpillar, Volvo, and Kubota.

Inspecting a Used Pivot Joint

• Bushings: no ovality, measurable play with original pin.
• Welds and angles: no cracks, especially around mounting ears.
• Grease channels: clear, no rust in grease fittings.
• Stops and bearing surfaces: marked but not worn through.
• Year of manufacture and serial number of the original machine.

Pivot Joint, Pin, or Swing Cylinder?

Play in the boom doesn’t always come from the pivot joint itself. Pins and bushings wear first and their replacement often suffices. The pivot joint is replaced when its bushings are oval or the metal is cracked. If the boom itself is cracked, see our used booms. On a two-piece boom, the cylinder controlling the upper part is another component: see our used pivot swing cylinders. For the rest of the machine, browse the used construction body parts selection.