Used Liebherr Boom Cylinder

The Liebherr Boom Cylinder, a key lifting component

The boom cylinder raises and lowers the boom, along with all its equipment: the arm, bucket, and load. On most excavators, two cylinders work in parallel, mounted between the turret and the boom base. They work together with the Liebherr arm cylinder and the Liebherr bucket cylinder. Many versions include a safety valve screwed onto the barrel, which holds the boom in case a hose fails—an essential feature for load lifting.

Liebherr boom cylinders in stock

• Crawler excavators: from the R312 to the R974C, with the widest selection of parts.
• Wheeled excavators: A308 to A924, both standard and Litronic versions.
• Material handling: LH22M material handlers and their boom versions.
• Heavy-duty versions: HD, HDS, and HDSL models for demolition and heavy work.
• Other cylinder parts: our Liebherr cylinders page covers all functions.

Liebherr crawler excavators R312 to R974C

Our inventory includes cylinders from models R312, R313 Litronic, R317, R900C, R900 Litronic, R902LC, R904, R904C HDSL, R906, R912, R914B, R914C, R916, R922, R924B, R924C and R924 Compact. Larger models are also available: R926, R934B, R934C, R936NLC, R942HD, R944B, R944C, R954B, R954C, R954C VH-HD, R956HD, R964B, R964C, R974B HD, and R974C. Between standard, HD, and short radius versions, the stroke and diameter of the cylinder vary—please specify the exact variant of your excavator.

Which lifting cylinders are available for Liebherr models A902, A904, A912, and A914?

• A902: boom lifting cylinders, identifiable by the excavator’s serial number.
• A904: A904, A904 C, and A904 C Litronic, depending on the generation.
• A912: A912 and A912 Litronic, including material handling versions.
• A914: A914 Compact, with reduced turning radius.
• Other wheeled excavators: A308, A310B, A311 Litronic, A312, A314, A316, and A924.

What types of boom cylinders are available for Liebherr excavators?

First, there are lifting cylinders for one-piece booms, mounted in pairs. Two-piece adjustable booms add a positioning cylinder to modify the angle between the two elements. Material handling machines use longer cylinders adapted for large reaches, often fitted with safety valves. Lastly, HD or HDSL versions receive reinforced cylinders to withstand demolition forces. Each type has its own pins and stroke length.

How to identify a Liebherr boom cylinder

• Machine: model designation, chassis or boom variant, and serial number.
• Marking: Liebherr reference stamped on the barrel or cylinder plate.
• Dimensions: closed cylinder length, effective stroke, rod and barrel diameters.
• Attachments: pin diameters for foot and head, clevis widths.
• Equipment: presence of a safety valve or end-of-stroke damper.

Refitting a used boom cylinder

Support the boom on blocks before removing the cylinder, then release the circuit pressure. When reinstalling, check the condition of the pins and bushings: a healthy cylinder on ovalized joints will quickly wear its seals. Purge air by slowly moving the boom through its full travel under no load. Then check the seal and hold in position with the boom raised after a few minutes engine off. For the boom structure itself, see our Liebherr boom page.

Codimatra, your source for Liebherr boom cylinders

• Over 40 years of dismantling public works machinery.
• About 17,000 references in stock, all brands included.
• Workshop checks: rod condition, sealing, barrel straightness.
• Technical advice from TP specialists based on measurements and serial numbers.
• Shipping on pallets from Castelculier, near Agen. Get a quote at 05 53 96 16 43.