Description
When hydraulic fittings start weeping or that cylinder won’t hold pressure like it used to, a worn o-ring is usually the culprit. These large-diameter Buna-N o-rings are sized for bigger hydraulic components and agricultural equipment that sees real work every day. At 4-1/8 inch inside diameter, they’re perfect for larger hydraulic cylinders, pump housings, and other components where a reliable seal means the difference between getting the job done and being stuck in the field.
What You’re Getting
- Heavy-duty Buna-N rubber construction that handles hydraulic pressures and temperature swings
- 70 durometer rating provides the right balance of flexibility and strength for farm equipment
- Precise 1/8 inch cross-section fits standard hydraulic grooves perfectly
- Five o-rings per package so you’ve got spares for the next repair
- Chemical resistance to hydraulic fluid, diesel fuel, and other farm fluids
Built for Real Farm Work
These o-rings are designed for use in plumbing, hydraulics, heavy equipment, automotive, irrigation and more. You’ll find this size in larger hydraulic cylinders on loaders, backhoes, and three-point hitch systems. They’re also common in pump housings, valve bodies, and anywhere you need a reliable seal on components with bigger bores.
Made to Last
Buna-N rubber stands up to the punishment farm equipment dishes out – hydraulic pressure spikes, temperature extremes from winter mornings to summer heat, and exposure to hydraulic fluid and other chemicals. The 70 durometer rating gives you an o-ring that’s firm enough to hold pressure but flexible enough to compress properly in the groove.
Good to Know
Always clean the groove thoroughly before installing a new o-ring – any dirt or debris will cause premature failure. A light coating of hydraulic fluid helps the o-ring seat properly without twisting. Keep the extras in a cool, dry place away from sunlight to maintain their flexibility for years.
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