3128321936 Hydraulic Rock Drill Seal Kit for Atlas Copco Boomer Face Drill Repair Service Kit

Heavy-Duty Hydraulic Rock Drill Overhaul Kit for Atlas Copco Boomer Face Drilling Rigs | OEM Part: 3128321936

Field Troubleshooting: When to Rebuild Your Rock Drill Hydraulics

In hard-rock development drifting and tunneling, Atlas Copco / Epiroc Boomer jumbos operate under continuous percussive impacts and severe cyclic pressure surges. Over extended shifts, thermal friction and hydraulic shockwaves degrade internal dynamic seal lips. Rebuilding your drifter housing or feed components with our 3128321936 service kit resolves critical operational failures:

• Penetration Speed Drop (Low Impact Blow Force): Internal fluid bypass past worn dampening or percussion seals starves the striking piston of hydraulic pressure.

• Hydraulic Oil Leaking at Shank Nose: Oil weeping around the front housing indicates primary U-cup degradation and wiper breakdown caused by rock dust ingress.

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

• Feed & Positioning Drift: Loss of hydraulic holding pressure causes imprecise face hole alignment and unstable drill positioning.

Technical Specifications & System 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: 3128321936 (Cross-ref: 3128 3219 36)

• Internal Catalog SKU: 3128321936-AC-BOOMER

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

• Dynamic Pressure Rating: Engineered for continuous dynamic holding and peak shock load spikes up to 250+ Bar (3625+ PSI)

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

• Primary Applications: Underground Mine Development, Civil Tunneling, Face Blast-Hole Drilling, and Hard-Rock Excavation

Material Science & Performance Advantages

• 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: Retains dynamic back-up tension during intense heat spikes caused by non-stop drilling shifts in enclosed mine headings.

• Anti-Extrusion Bronze-PTFE Guide Rings: Provides ultra-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 abrasive quartz dust, drill cuttings, and wash-down water before contaminants enter the main hydraulic circuit.

On-Site Maintenance Guidelines for Mine Mechanics

💡 Jobsite Maintenance Tip:

High-frequency percussive rock drills require strict cleanliness during seal overhauls. When replacing seals using the 3128321936 kit, thoroughly clean all gland cavities in a clean solvent bath. Inspect the striking bar (shank adapter) contact face and driver bushings for ovalization or scoring. Installing fresh dynamic seals over worn bushings will lead to rapid wiper cutting. Replace driver bushings concurrently with dynamic seals to ensure maximum service lifespan.

Q&A

• Q: Is part number 3128321936 interchangeable between Atlas Copco and Epiroc brands?

  A: Yes. Epiroc is the dedicated mining and rock excavation brand formerly operating under Atlas Copco. Part number 3128321936 / 3128 3219 36 matches identical factory dimensions across both brand designations.

• Q: What causes premature dynamic seal failure in underground face drilling rigs?

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