5501550300 Hydraulic Cylinder Repair Seal Kit for Atlas Copco & Epiroc Scooptram ST1030 Underground Loader

Maintain maximum breakout leverage and stop fluid loss in hot, confined mining drifts with our premium Hydraulic Cylinder Repair Seal Kit (Part Number: 5501550300 / 5501 5503 00).

Underground LHD (Load-Haul-Dump) loaders endure continuous thermal cycles, severe hydraulic shock loads, and relentless rock-slurry contamination. Specially engineered for the Atlas Copco / Epiroc Scooptram ST1030 underground loader, this heavy-duty service kit isolates high-pressure fluid chambers, prevents cylinder drift during heavy mucking, and extends operational life under demanding underground conditions.

Key Technical & Operational Advantages

• High-Modulus Mining PU Matrix

  Uses proprietary hydrolysis-resistant Polyurethane (PU/TPU) dynamic rod seals that maintain lip geometry under continuous working pressures exceeding 210 bar without hardening or extrusion.

• High-Heat Thermal Endurance

  High-fluorine NBR energizer rings retain elastic memory and constant radial seal force in enclosed underground shafts where hydraulic oil temperatures routinely hit 120°C.

• Zero-Drift Load Holding

  Low-friction, bronze-filled PTFE piston seals isolate fluid chambers under heavy static ore loads, eliminating boom sag and bucket tilt creep during tramming and mucking.

• Heavy Scraper Wiper Protection

  Outfitted with a double-lip scraper wiper seal that strips away abrasive quartz dust, mine mud, and acidic moisture before grit can score the chrome piston rod.

Technical Specifications

• Brand Compatibility: Atlas Copco / Epiroc Underground Mining

• Compatible Equipment: Atlas Copco / Epiroc Scooptram ST1030 Underground Loader (LHD)

• Application Location: Hydraulic Cylinder Assembly (Lift / Tilt / Steering / Dump Circuits)

• OEM Reference Part Numbers: 5501550300 / 5501 5503 00 / 5501-5503-00

• Internal SKU / Item Code: 5501550300

• Product Type: Heavy-Duty Hydraulic Cylinder Overhaul Kit

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

• Primary Application: Underground Hard Rock Mining, Tunneling, Muck-Piling, and Heavy Ore Handling

Underground Service & Maintenance Advice

💡 Fleet Maintenance Tip: In underground mining drifts, airborne quartz dust bonds with leaking hydraulic fluid to form an abrasive polishing paste. When installing the 5501550300 seal kit, inspect the chrome rod for fine scratching and clean the gland housing thoroughly. Replacing damaged guide rings alongside dynamic seals prevents premature lip wear and ensures long service life.

Fitment Verification: Please verify your original part number (5501550300) or machine service manual prior to ordering to guarantee 100% fitment accuracy.