11709528 Hydraulic Boom Cylinder Seal Kit — Volvo BL61 Backhoe Loader (11881459)
The BL61 is Volvo’s two-way backhoe loader, combining a wheel loader front end with an excavator-style backhoe on a single 8.2-ton platform. Its boom uses a closed box-welded construction with a cast iron kingpost, chosen specifically for structural strength with fewer welds and components than a conventional design — delivering a tear-out force of roughly 43.9 kN and a maximum digging depth around 4.28 meters.
This seal kit fits the boom cylinder identified by Volvo cylinder number 11881459, built with a 65mm rod diameter and 120mm bore. It’s confirmed for units up to serial number 11458 — Volvo revised cylinder specifications on later BL61 production, so machines past this serial range may require a different seal profile even though the boom design looks identical from the outside.
Why Choose Our Volvo Seal Kits?
Premium Materials
Built with advanced Polyurethane (PU) and durable NBR rubber to handle the pressure loads generated by the BL61’s box-welded boom design, minimizing wear and enduring wide temperature fluctuations.
Perfect Fitment
Precision dimensional cutting to the 65mm rod / 120mm bore specification ensures a seamless drop-in replacement, reducing installation time and ensuring a zero-leak seal.
Built for Tough Jobs
Engineered to provide reliable protection against dust, dirt, and hydraulic contamination in harsh construction and utility environments.
Technical Specifications
- Brand Compatibility: Volvo
- Machine Model: BL61 Backhoe Loader (Two-Way Loader)
- Applicable Serial Numbers: Up to 11458
- Application Location: Main Boom / Lifting Cylinder
- Rod Diameter: 65mm
- Bore Diameter: 120mm
- OEM Cross-Reference Part Numbers: 11881459, 11709528
Important Fitment Note
This kit is specifically designed for the BOOM / LIFT cylinder of the backhoe section, and is confirmed for machines up to serial number 11458. Please verify your machine’s serial number and original cylinder part number before purchasing to ensure a 100% accurate match — later BL61 production runs may use a revised cylinder specification.
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