3115917091 Hydraulic Rock Drill Seal Kit for Atlas Copco COP 1838HD

Heavy-Duty Hydraulic Rock Drill Seal Overhaul Kit for Atlas Copco / Epiroc COP 1838HD Drifters | OEM Part: 3115917091

Maximum Impact Power for Hard-Rock Underground Drilling

The Atlas Copco / Epiroc COP 1838HD hydraulic rock drill is renowned for its exceptional penetration rate and high-frequency percussive energy. Operating under continuous high-pressure shockwaves, extreme thermal friction, and abrasive quartz slurry, the dynamic seals inside the drifter housing are subjected to severe cyclic stress.

When dynamic seal lips degrade, hydraulic fluid bypasses internal dampening chambers, causing a sharp drop in striking power, elevated operating oil temperatures, and external oil weeping around the front housing. Rebuilding your drifter with our 3115917091 Service Seal Kit restores original hydraulic isolation, prevents fluid contamination, and ensures maximum drifter uptime.

Technical Specifications & System Compatibility

• Brand & System Compatibility: Atlas Copco / Epiroc Mining & Rock Excavation Systems

• Target Equipment Component: Atlas Copco / Epiroc COP 1838HD Hydraulic Rock Drill (Drifter)

• Primary OEM Part Number: 3115917091 (Cross-ref: 3115 9170 91)

• Internal Catalog SKU: 3115917091-AC-1838HD

• Material Science Compound Matrix: Hydrolysis-Resistant TPU + High-Temp Viton (FKM) + Bronze-Filled PTFE + Industrial NBR

• Dynamic Operating Pressure Limit: Rated for continuous dynamic loads and peak shock spikes up to 250+ Bar (3625+ PSI)

• Thermal Endurance Range: -30°C to 120°C (-22°F to 248°F)

• Kit Contents: Dynamic Percussion Rod Seals, Dampening U-Cups, Piston Guide Rings, Front Wiper/Scraper, and High-Temp O-Rings

Key Hydraulic Protection & Material Features

• High-Modulus Polyurethane (TPU) U-Cups: Specially compounded to resist fluid hydrolysis, retaining dynamic lip tension and flexible memory under high-frequency impact cycles.

• High-Temp Viton (FKM) Energizers: Maintains static and dynamic seal pressure during severe hydraulic oil heat spikes in enclosed face headings.

• Bronze-Filled PTFE Guide Rings: Provides low-friction guidance along moving components, preventing scuffing, dampening chatter, and stopping cross-chamber oil leakage.

• Heavy-Duty Double-Lip Scraper Wiper: Actively strips away quartz dust, drill cuttings, and wash-down water before contaminants enter the main hydraulic circuit.

Field Service & Rebuild Guidelines for Mine Mechanics

💡 Jobsite Maintenance Tip:

High-frequency percussive drifters like the COP 1838HD require strict cleanliness during seal overhauls. When replacing seals using the 3115917091 kit, thoroughly clean all gland cavities in a solvent bath. Inspect the driver bushings and striking bar (shank adapter) contact surfaces for ovalization, grooving, or scoring. Installing new dynamic seals over worn driver bushings will lead to rapid wiper cutting and premature fluid leaks.

Q&A

• Q: Is part number 3115917091 interchangeable between Atlas Copco and Epiroc COP 1838HD drifters?

  A: Yes. Epiroc is the dedicated mining and rock excavation equipment brand formerly operating under Atlas Copco. Part number 3115917091 / 3115 9170 91 matches identical OEM dimensions across both brand designations for the COP 1838HD rock drill.

• Q: What are the main failure symptoms that indicate a COP 1838HD drifter needs new seals?

  A: Primary indicators include a drop in drill penetration speed (loss of impact force), hydraulic fluid weeping around the front shank nose, excessive hose vibration, or elevated oil temperatures caused by internal fluid bypass.