Atlas Copco SBU340 Hydraulic Breaker Seal Kit 3315350690

Heavy-Duty Hydraulic Breaker Seal Overhaul Kit for Atlas Copco & Epiroc SBU340 Hydraulic Hammers | OEM Part: 3315350690

Maximum Striking Power for Heavy Demolition & Quarrying

The Atlas Copco / Epiroc SBU340 hydraulic breaker is engineered for high-performance trenching, primary rock breaking, and heavy demolition. Operating under thousands of high-frequency blows per minute, severe hydraulic pressure surges, and continuous exposure to quartz dust and slurry, dynamic seals inside the hammer cylinder undergo extreme mechanical fatigue.

When dynamic seal lips degrade, internal hydraulic fluid bypasses the striking piston chamber, leading to a noticeable loss of impact energy, hesitating stroke frequency, elevated operating oil temperatures, and external fluid weeping past the lower tool bushing. Rebuilding your breaker with our 3315350690 Service Seal Kit restores peak hydraulic compression, stops fluid leaks, and maximizes jobsite equipment uptime.

Technical Specifications & System Cross-Reference

• Brand Compatibility: Atlas Copco / Epiroc Demolition Tools

• Target Equipment Component: Atlas Copco / Epiroc SBU340 Solid-Body Hydraulic Breaker / Hammer

• Primary OEM Reference Part Number: 3315350690 (Cross-Ref: 3315 3506 90)

• Internal Catalog SKU: 3315350690-AC-SBU340

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

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

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

• Kit Inclusions: Main Piston Dynamic Step Seals, Accumulator O-Rings, Buffer Seals, Back-up Rings, and Front Tool Dust Scraper

Key Material Science & Hydraulic Protection Features

• High-Modulus Polyurethane (TPU) Step Seals: Retains dynamic lip flexibility and sealing memory under intense vibration and rapid percussive cycles without cracking.

• High-Temp Viton (FKM) Energizers: Maintains steady dynamic radial tension during severe hydraulic oil thermal spikes inside enclosed hammer housings.

• Anti-Extrusion PTFE Wear Rings: Reduces sliding friction along moving impact components, preventing scuffing and cross-chamber oil leakage.

• Heavy-Duty Scraper Wiper: Actively clears abrasive quartz dust, concrete debris, and moisture before contaminants penetrate internal piston housings.

Field Service & Rebuild Guidelines for Equipment Mechanics

💡 Jobsite Maintenance Tip:

High-frequency hydraulic breakers require clean assembly conditions during seal overhauls. When servicing an Atlas Copco SBU340 hammer using the 3315350690 kit, thoroughly flush the cylinder housing and accumulator cavity in a clean solvent bath. Inspect the piston surface and tool steel bushing for scoring or excessive clearance. Installing new dynamic seals into a worn bushing housing can cause premature seal lip cutting and rapid fluid bypass.

Q&A

• Q: Is seal kit 3315350690 fully compatible with both Atlas Copco and Epiroc branded SBU340 breakers?

  A: Yes. Epiroc is the dedicated mining and demolition equipment brand formerly operating under Atlas Copco. Part number 3315350690 matches identical OEM factory dimensions across both brand designations for the SBU340 hydraulic hammer.

• Q: What are the primary failure symptoms indicating an Atlas Copco SBU340 hammer needs a seal overhaul?

  A: Key indicators include a loss of impact striking force, slow or hesitating chisel stroke frequency, visible hydraulic fluid leaking around the lower tool steel bushing, or excessive hydraulic hose pulse vibration.