Part No.: 3115 1690 91 Product Name: Seal Repair Kit Applicable Equipment: Atlas Copco COP1838HD Hydraulic Rock Drill Kit Contents: O-rings, oil seals, dust seals, PU wear rings, PTFE guide rings, gaskets and other sealing wearing parts Sealing Material: NBR, PU, PTFE, FKM Working Condition: High-pressure hydraulic circuit sealing for impact mechanism and rotation motor, oil resistant and wear resistant Function: Full set sealing spare parts for rock drill overhaul, eliminate internal & external oil leakage, restore impact power Matching Spare Parts: Striking piston, driver, guide sleeve, shank adapter Maintenance Note: Replace the whole kit during overhaul. Fully clean hydraulic circuit before assembly, inspect cylinder and piston surface for scratches.