9120099007 Hydraulic Rock Drill Seal Kit for Atlas Copco Boomer Face Drill Repair Service Kit

Heavy-Duty Hydraulic Rock Drill Repair Service Kit for Atlas Copco Boomer Face Drilling Rigs | OEM Part: 9120099007

Engine Room & Jobsite Context: Built for Intense Tunneling & Development Drifting

On underground development faces and tunneling headings, Atlas Copco / Epiroc Boomer jumbos rely on high-frequency hydraulic rock drills to drive rapid blast-hole rounds. Delivering thousands of percussive impacts per minute, the dynamic seals inside the drifter and feed assemblies endure continuous pressure shockwaves, intense thermal friction, and aggressive rock dust contamination.

When dynamic seal lips degrade under heat and mechanical fatigue, the rock drill suffers from decreased penetration rates, excessive hydraulic oil temperatures, and fluid weeping around the shank adapter nose. Our 9120099007 service overhaul kit directly restores original hydraulic pressure containment and protects high-value internal strike components against premature wear.

Technical Specifications & Equipment Compatibility

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

• Target Machinery Application: Atlas Copco Boomer Underground Face Drilling Jumbo Series (Rock Drill & Feed Hydraulics)

• Primary OEM Part Number: 9120099007 (Cross-ref: 9120 0990 07)

• Internal Catalog SKU: 9120099007-AC-BOOMER

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

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

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

• Primary Application Scope: Underground Mine Development, Civil Tunneling, Face Drilling, and Hard-Rock Excavation

Material Science Breakdown: Why Standard Seals Fail in Rock Drills

• Fatigue-Resistant Polyurethane (TPU) U-Cups: Formulated to resist dynamic hydrolysis and mechanical stress, maintaining flexible lip memory and radial sealing pressure under rapid 50+ Hz impact cycles.

• High-Heat Viton (FKM) O-Rings: Serves as dynamic back-up energizers, retaining seal tension even during long shifts where hydraulic oil temperatures spike inside confined tunnel headings.

• Bronze-Filled PTFE Guide & Piston Rings: Provides ultra-low friction guidance along moving components, preventing metal-to-metal contact, absorbing lateral shock, and stopping internal pressure bypass.

• Heavy-Duty Scraper Wiper: Seals the front nose housing, aggressively clearing away quartz grit, rock slurry, and flushing water before debris can score the internal chrome surfaces.

Field Service & Rebuild Advice for Mine Mechanics

💡 Jobsite Maintenance Tip:

High-frequency rock drills require strict cleanliness during seal overhauls. When replacing seals using the 9120099007 kit, thoroughly clean gland cavities and inspect the striking bar (shank adapter) contact surface and driver bushings for ovalization or scoring. Installing fresh dynamic seals over worn bushings will lead to rapid wiper damage. Replacing driver bushings concurrently with dynamic seals ensures maximum rebuild lifespan and consistent penetration speed.

Q&A

• Q: Is part number 9120099007 compatible with both Atlas Copco and Epiroc Boomer rigs?

  A: Yes. Epiroc is the dedicated mining equipment manufacturer formerly operating under Atlas Copco. Part number 9120099007 / 9120 0990 07 matches exact OEM factory dimensions across both brand designations.

• Q: What are the primary failure symptoms indicating that an Atlas Copco Boomer rock drill needs a seal overhaul?

  A: Common indicators include a sudden drop in rock penetration speed, visible hydraulic oil weeping around the front shank adapter, or excessive hydraulic fluid heat buildup caused by internal bypass.