Heavy-Duty 11712455 Main Excavator Boom Cylinder Repair Seal Kit for Volvo BL60 Backhoe Loader | Premium Overhaul Solution

Restore maximum lifting leverage and stop rear excavator boom drift with our precision-engineered Excavator Boom Cylinder Seal Kit (Part Numbers: 11712455 / VOE11712455).

Rear excavator boom cylinders endure severe continuous shock loads during deep trenching, heavy pipe placement, and hard ground ripping. Operating at the highest circuit pressures on the machine, any seal degradation quickly leads to boom sinking, reduced digging force, and fluid contamination. Engineered specifically for Volvo BL60 and BL60B backhoe loaders (fits 60mm rod / 110mm cylinder bore main boom cylinders), this heavy-duty overhaul kit eliminates internal cross-chamber leakage, stops hydraulic drift under heavy load, and extends cylinder operating life.

Key Technical & Operational Advantages

• High-Pressure Dynamic Shock Containment

  Features high-modulus Polyurethane (PU/TPU) dynamic rod seals paired with high-resilience NBR O-ring energizers, specifically engineered to withstand massive hydraulic pressure spikes (250+ bar) encountered during rock ripping and heavy digging without lip distortion or extrusion.

• Zero-Drift Heavy Holding Power

  Includes low-friction, bronze-filled PTFE piston seal rings paired with anti-extrusion backup rings. Eliminates internal fluid migration so the rear excavator boom remains rock-solid when holding trench boxes, pipes, or concrete structures suspended.

• Heavy-Duty Double-Lip Environmental Guard

  Outfitted with a metal-clad, double-lip dirt wiper that aggressively strips off caked mud, abrasive quartz sand, and crushed rock particles before they can penetrate the gland packing or scratch the 60mm chrome piston rod.

• Thermal Stability & Fluid Resistance

  Formulated to retain lip flexibility and continuous radial seal pressure across extreme working temperatures (-35°C to 110°C), resisting fluid breakdown and seal hardening during all-day trenching.

Technical Specifications

• Brand Compatibility: Volvo / Volvo Construction Equipment (VCE)

• Compatible Backhoe Models: Volvo BL60, BL60B Backhoe Loaders

• Circuit Location: Rear Excavator Attachment Main Boom Cylinder

• OEM Cross-Reference Part Numbers: 11712455 / VOE11712455 / VME-11712455

• Cylinder Fitment Specs: 60 mm Rod Diameter / 110 mm Cylinder Bore

• Kit Components: Heavy-Duty Scraper Wiper, Dynamic U-Cup Rod Seal, Buffer Ring, Bronze-Filled PTFE Piston Ring, High-Pressure O-Rings & Backup Rings

• Material Composition: Premium TPU + High-Temp NBR + Bronze-Filled PTFE Wear Rings

• Primary Application: Excavation, Trenching, Pipe Laying, Civil Utilities, and Heavy Ripping

Excavator System Maintenance & Service Recommendation

💡 Boom Hydraulic Circuit Tip: The main boom cylinder experiences the heaviest dynamic workload on the excavator end. When replacing seals, inspect the 60mm piston rod for fine pitting, chrome flaking, or scoring caused by past dust contamination. Installing fresh seals on a scored rod can prematurely wear the wiper and primary U-cup lip. Always polish minor scratches or re-chrome damaged rods during the seal service.

Fitment Verification: Please verify your cylinder rod diameter (60mm) and machine serial number against Volvo OEM catalog specifications prior to ordering to guarantee 100% fitment accuracy.