Boom Cylinder Seal Kit 0995310 for CAT E70B Excavator | Repair Set 0855096

Eliminate Boom Drift & Hold Heavy Loads Securely

When boom cylinder seals degrade, the excavator arm slowly creeps downward under load, causing safety hazards, imprecise grading, and costly hydraulic oil waste. This heavy-duty boom cylinder seal kit replaces worn packing sets to restore structural holding power and full lift capability on Caterpillar E70B compact excavators utilizing cylinder assembly 0855096.

Designed for severe digging cycles and constant pressure holds, every seal in this pack matches factory tolerances for a direct, leak-free drop-in replacement.

Engineered Material Defense

• High-Pressure Rod & Piston Seals: Precision-molded Polyurethane (PU) resists deformation under sustained pressure holds and sharp hydraulic spikes during heavy lifting.

• Secondary Static Seals & O-Rings: Heavy-duty Nitrile Rubber (NBR) maintains elasticity across high fluid temperatures while standing up to aggressive mineral hydraulic fluids.

• Heavy-Duty Dirt Wiper: Prevents abrasive mud, quarry dust, and site grit from scraping against the chrome cylinder rod and contaminating the internal fluid loop.

Machine & Component Compatibility

• Machine Model: CAT E70B Excavator

• Cylinder Assembly Reference: 0855096 (Boom Cylinder)

• Kit Part Number: 0995310

Technical Specifications

• Component Type: Boom Cylinder Hydraulic Seal Kit / Rebuild Set

• Primary Materials: Polyurethane (PU), Nitrile Rubber (NBR), PTFE anti-extrusion rings

• Operating Temperature Range: -30°C to 110°C (-22°F to 230°F)

• Fluid Compatibility: ISO VG 32/46/68 mineral-based hydraulic oils

• Fitment Target: Direct replacement drop-in fit for field maintenance or shop rebuilds

Fitment Verification Notice

Caterpillar machinery can use multiple cylinder suppliers across production years. Before purchasing, verify your cylinder casting stamp or cross-reference part number 0995310 / 0855096 in your CAT E70B parts manual to guarantee exact dimension matching.