Multiquip EM518556 Crank Arm Bushing

The Multiquip EM518556 Crank Arm Bushing is a genuine OEM component designed for LS300P and LS600P hydraulic-driven concrete pumps. As a direct OEM replacement, EM518556 is manufactured to the same specification as the original part, ensuring the crank arm assembly operates with the correct tolerances and fit. This bushing is confirmed for use on LS300P and LS600P models, making part selection straightforward for operators and service technicians keeping these pumps in working order. Sourced through DHS Equipment, you can trust you are receiving an authorized Multiquip part backed by the OEM supply chain.

Key Features

• OEM-Grade Bushing Material — Manufactured to original Multiquip tolerances, ensuring the crank arm pivot point maintains the correct bearing surface and resists accelerated wear under high-cycle pumping loads.
• Direct Drop-In Replacement — Engineered to seat into the crank arm assembly exactly as the original, with no reworking of the bore or mounting hardware required.
• Confirmed Fitment for LS300P and LS600P — Verified compatibility with Multiquip hydraulic concrete pump models LS300P and LS600P, so you can order with confidence.
• Restores Stroke Consistency — A correctly fitted bushing keeps the crank arm pivot tight and concentric, maintaining accurate piston stroke and consistent concrete output volume.
• Prevents Accelerated Crank Arm Wear — A worn or missing bushing transfers load directly to the crank arm bore, causing rapid metal-on-metal wear and eventual component failure that is far more costly to repair.

The crank arm bushing serves as the bearing interface between the crank arm and its pivot pin in the reciprocating drive mechanism of a hydraulic concrete pump. It absorbs the rotational and lateral forces generated during each pumping stroke, allowing the crank arm to pivot smoothly without metal-to-metal contact against the pin. When this bushing wears down or fails, the resulting play in the pivot causes inconsistent stroke length, increased vibration throughout the drive assembly, and accelerated damage to surrounding components including the crank arm itself and the connecting rod linkage.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.