Before You Extend: Critical Checks for Retrofitting an Excavator Long Arm

May 29, 2026

Retrofitting a standard excavator with a long arm attachment is like giving your machine a superpower—but without proper preparation, it can easily backfire. Before investing in an extended reach, contractors must rigorously evaluate several critical factors to ensure safety and optimal performance.

First and foremost is tonnage matching. A common misconception is that any excavator can handle any length of arm. In reality, arm length must be strictly proportional to the base machine’s weight class. For instance, a 20-ton excavator is generally suited for a 15.4-meter arm, while pushing beyond this without adequate counterweight will severely compromise stability. Speaking of counterweights, adding rear ballast is mandatory. The massive leverage created by a long arm shifts the center of gravity forward; extra rear weight is essential to prevent dangerous tipping during lifting or swinging motions.

Next, the hydraulic system requires a thorough health check. Longer arms demand more hydraulic flow and pressure to operate smoothly. Contractors must verify that the machine's main pumps and valves can support the additional cylinders required for the new arm without overheating or losing responsiveness.

Finally, never underestimate the wear on the undercarriage and swing bearing. The added front-end weight puts tremendous stress on these components. It is highly recommended to retrofit long arms onto machines that are in good mechanical condition (ideally 5-8 out of 10 in terms of wear). Conducting a comprehensive pre-installation inspection ensures that your excavator has the structural integrity to handle the extreme leverage of a long arm safely and efficiently.

Zhonghe Machinery is a big Manufacturer of Excavator Arm and Boom

Any interest,

Welcome to contact Aria--sales manager of Zhonghe Machinery.

Whatsapp: wa.me/+8613822325403

Email: aria@excavatorlongarm.com

Website link: www.excavatorlongarm.com

Persona de Contacto :	Miss. Aria
Teléfono :	+86 13822325403
Fax :	86-138-2232-5403

Ponerse en contacto

9 Huancui West Road, Cuishanhu New Area, ciudad de Kaiping, provincia de Guangdong, China

aria@excavatorlongarm.com

+86 13822325403

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