Atlas Copco, sealing ring 3115336300

Basic Info

• Part Number: 3115336300 (3115 3363 00)
• Description: Sealing Ring / Lip Seal / U‑Cup Oil Seal
• Brand: Atlas Copco / Epiroc
• Material: PU (Polyurethane) / NBR, high pressure‑resistant
• Type: U‑cup / single‑lip, dynamic seal
• Weight: ~0.1 kg
• Pressure Rating: Up to 250–300 bar (for rock drill hydraulics)

Application (Compatible Models)

• COP Series Rock Drills:
  
  
  COP 1238, COP 1838, COP 1840, COP 2560, COP MD20, etc.
• Use Position:
  
  
  Front/ rear cylinder, piston rod, percussion mechanism, nitrogen accumulator sealing.

Function

• Seals high‑pressure hydraulic oil between piston and cylinder.
• Prevents internal leakage and pressure loss during percussion/rotation.
• Withstands heavy impact and vibration in mining drills.
• Critical for maintaining drill efficiency and reducing oil consumption.

Related & Cross‑Reference Parts

• 3115238600: U‑cup seal (similar, different size)
• 3115269300: Cup seal (for older COP models)
• 3115924596: Seal kit (includes 3115336300 + O‑rings)

Notes

• Original Epiroc/Atlas Copco part is recommended for high pressure and long life.
• Replace as a set with matching O‑rings during overhaul.
• Often used together with nitrogen supply valve 3115376800 (your previous item).