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If you are involved in repairing hydraulic systems, we know you require more than just seals. The Technical Information pdf below includes cylinder specifications, installation and operation instructions, fluid formulas, conversion factors and other useful guides to assist you with the repair of your hydraulic system. You can also view or download a variety of engineering charts.

Hercules also has an in-house Engineering Department which can assist you with seal design, material testing and seal failure analysis. To speak directly to a Hercules Engineer, please call 800-665-7325.

Reference Guides

Technical Information

Inch and Metric Conversion Table

Fluid Compatibility Table

Groove Dimensions for Urethane Seals

O-Ring Gland Dimensions

O-Ring Size Chart and Installation Data - Inch

O-Ring Size Chart and Installation Data - Metric

Seal Stretcher Instructions

Technical Assistance Forms

Engineering Action Request Form

Seal Failure Checklist

Technical Articles

Tech Tip - Seal Failure - Dieseling

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