Atlas Copco Long Hole Rig Seal Kit 9121652650 Replacement

Heavy-Duty Hydraulic Seal Overhaul Service Kit for Atlas Copco Long-Hole Drilling Rigs | OEM Part: 9121652650

Field Troubleshooting: When to Overhaul Your Long-Hole Drilling Hydraulics

In underground sub-level stoping and production benching, Atlas Copco long-hole drilling rigs operate under continuous percussive impacts and severe hydraulic load cycles. Over time, high thermal friction and hydraulic shockwaves degrade dynamic dynamic sealing lips. Rebuilding your rock drill or feed cylinder with our 9121652650 service kit resolves critical operational issues:

• Penetration Speed Drop: Internal fluid bypass past worn dynamic sealsstarves the impact mechanism of hydraulic power, reducing drill meters per shift.

• Hydraulic Oil Weeping at Gland Nose: Oil leaking around the front housing indicates primary U-cup and wiper breakdown caused by rock dust contamination.

• System Heat Buildup: High-pressure oil bypassing dynamic seal lips creates fluid aeration and excessive heat in the hydraulic power unit.

• Feed Cylinder Creep: Loss of holding force on positioning or feed extension circuits causes accurate drilling angle alignment loss.

Technical Specifications & Equipment Compatibility

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

• Target Machinery Application: Atlas Copco Long-Hole Underground Production Drilling Rigs (Simba Series & Drifter Systems)

• Primary OEM Part Number: 9121652650 (Cross-ref: 9121 6526 50)

• Internal Catalog SKU: 9121652650-AC-RIG

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

• Dynamic Operating Pressure Rating: Rated for peak cyclic pressure surges up to 250+ Bar (3625+ PSI)

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

• Primary Hydraulics Included: Rock Drill Percussion Seals, Feed Extension Rod Seals, Buffer Rings, Scraper Wipers, and High-Pressure O-Rings

Material Science & Performance Features

• High-Modulus Polyurethane (TPU) U-Cups: Specially compounded to resist fluid hydrolysis, keeping dynamic sealing lips supple and energized despite high-frequency mechanical vibration.

• High-Temperature Viton (FKM) Energizers: Maintains elastic seal recovery during intense heat spikes caused by non-stop drilling shifts in enclosed mine headings.

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

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

On-Site Service Advice for Mine Maintenance Crews

💡 Fleet Maintenance Tip:

High-frequency percussive drilling creates airborne quartz dust that bonds with oil residue to form an abrasive slurry. When rebuilding hydraulic components using the 9121652650 seal kit, thoroughly clean gland cavities and inspect the percussion piston or rod surface for micro-scoring. Replacing worn driver or guide bushings concurrently with dynamic seals prevents housing chatter and doubles seal service life.

Q&A

• Q: Is part number 9121652650 compatible with both Atlas Copco and Epiroc long-hole rigs?

  A: Yes. Epiroc is the dedicated mining and rock excavation brand formerly under Atlas Copco. Part number 9121652650 / 9121 6526 50 matches exact factory specifications across both brand designations.

• Q: What causes premature seal failure in underground long-hole rock drills?

  A: Dynamic seal failure is primarily driven by dynamic pressure spikes, thermal fluid degradation, and abrasive quartz slurry penetrating worn front scraper wipers.