Atlas Copco 4B00S120S Cylinder Repair Kit

Atlas Copco 4B00S120S Cylinder Repair Kit is a Hercules catalog product available from WQC Parts for hydraulic cylinder, seal kit, pump, motor, valve, and heavy-equipment repair applications.

This listing uses Hercules part number ATL-4B00S120S. Catalog description: I-PK-N-N-5-12.

Product Details

• Hercules part number: ATL-4B00S120S
• Product type: Replacement cylinder or cylinder repair component
• Reference brand/application: Atlas
• Approximate weight: 0.259 lb
• Catalog data source: 2026 US Industrial Catalog

Catalog Application Data

• Catalog section: Piston Seal Kits (6,7,8) Nitrile
• Catalog page reference: 25, 29, 32

Use this product when your parts book, service manual, cylinder repair list, pump/motor breakdown, or existing component calls for ATL-4B00S120S. It is intended to help restore sealing performance, reduce leakage, and support reliable equipment repair when correctly matched to the application.

Fitment Verification

Before ordering, confirm the ATL-4B00S120S reference against your OEM reference number, machine model, cylinder location, bore and rod size, pump/motor series, and serial-number range. Manufacturer names and part numbers are used for identification and fitment reference only. If you are unsure, compare the old parts, measurements, and parts-book callout before installation.