Description
When you’re dealing with the larger hydraulic cylinders, transmission housings, and heavy-duty sealing applications on bigger equipment, standard small o-rings just won’t cut it. This hefty 5-1/4 inch inside diameter o-ring is built for the real sealing challenges you face on larger tractors and equipment. Whether it’s sealing a hydraulic pump housing, transmission case, or other critical component, this ring handles the pressure and keeps your equipment running without costly leaks.
What You’re Getting
- Generous 1/4 inch wide cross-section provides excellent sealing under high pressure
- 5-1/4 inch inside diameter fits larger equipment components and housings
- 70 durometer Buna-N rubber resists oils, hydraulic fluids, and the heat cycles that destroy cheaper seals
- Comes in a 10-pack so you’ve got spares when that next seal job comes up
- Direct replacement for equipment applications requiring this specific size
Built for Heavy Equipment Work
These o-rings are designed for use in plumbing, hydraulics, heavy equipment, automotive, irrigation and more. The large diameter makes them perfect for sealing bigger hydraulic pumps, transmission cases, PTO housings, and other heavy-duty applications where smaller rings would fail. O-rings appear everywhere on modern equipment – hydraulic fittings, fuel system connections, oil filter housings, coolant joints, and this size handles the bigger sealing jobs on your larger machinery.
Made to Last
Despite their simplicity, O-rings face harsh conditions. Heat cycles cause them to harden and lose elasticity. Chemical exposure from fuels and fluids degrades rubber compounds. That’s why these are made from quality Buna-N rubber that stands up to hydraulic oil, diesel fuel, and the temperature swings your equipment puts seals through. The thick 1/4 inch cross-section means they maintain their sealing ability even when compressed.
Installation Notes
O-ring success starts with using the right size and material. Measure carefully – both diameter and cross-section must match exactly. Clean sealing surfaces thoroughly; scratches or debris prevent proper sealing. Lubricate O-rings with compatible fluid before installation. With this larger size, take extra care not to twist or roll the o-ring during installation – a light coating of hydraulic oil helps it slide into place smoothly.
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