New 6V3831 Seal O Ring Replacement suitable for Caterpillar Equipment
- New Seal O Ring Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 6V3831 Seal O Ring
â–¶Specification for 6V3831 Seal O Ring
â–¶Exact Fit Guarantee for 6V3831 Seal O Ring
â–¶| Dimensions | 2.56x2.56x0.08 |
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Great affordable option for aftermarket parts
Found Propel Parts while looking for parts to repair a D6C dozer that has been sitting for 20 years. Great parts, great prices, fast shipping and excellent customer service. -
A Delay Handled the Right Way
Honestly, if I were in Miami like my shipment was, I wouldn?t have been in a hurry to ship out either. I was frustrated at first ? delays cost me time on the job ? but Propel Parts stepped up.
Deb, Daniel and the team owned the mistake, kept the communication clear, and graciously refunded my shipping costs without making it a hassle. That kind of accountability is rare these days, and I genuinely appreciated how they handled it.
Things don?t always go perfectly, but these folks proved they?re more interested in doing right by their customers than just pushing parts out the door. Solid company, solid people.
? Jimmy Spong
Hartco Mobile Welding
P.S. Incredible quality on the pin as well. I had to do some custom modifying, and let?s just say the case hardening was ? well ? hard. Great Stuff! Thank you. -
Excelente servicio rapido, responsable y confiable
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The best supplier ever we mainly deal with most rare needed parts .. i highly recommend .. they are very very honest
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Excellent service and very very good service
Frequently Asked Questions
What is the Caterpillar O-Ring 6V3831 used for?
The 6V3831 is a sealing O-ring used in Caterpillar equipment to maintain leak-free connections in hydraulic systems, fuel lines, and engine assemblies. It provides a tight radial or face seal in threaded ports, tube fittings, and other connection points where fluid containment under pressure is essential.
Is the 6V3831 a direct replacement for the original Caterpillar O-ring?
Yes. The 6V3831 O-ring from Propel Parts is a high-quality aftermarket replacement that meets or exceeds OEM specifications. It matches the original in dimensions, material composition, and sealing performance to ensure a reliable drop-in replacement without modification.
What size is the 6V3831 O-Ring?
For precise dimensions including inner diameter, outer diameter, and cross-section thickness, refer to the product page or your Caterpillar parts manual. Using the exact specified O-ring size is critical ??? even a small size difference can result in inadequate sealing or O-ring extrusion under pressure.
Which Caterpillar equipment and engines is this O-ring compatible with?
The 6V3831 fits several Caterpillar machines depending on where it is applied. If you are unsure, please reach out to Propel Parts for help verifying fitment ??? our team can help confirm the right part for your specific application.
How should I store spare O-rings to prevent premature degradation?
Store O-rings in a cool, dark environment away from UV light, ozone sources (such as motors and fluorescent lighting), and extreme temperatures. Keep them in sealed bags or original packaging and away from solvents. Properly stored O-rings can remain serviceable for several years.
What should I do if an O-ring leaks shortly after installation?
If a new O-ring leaks, the most likely causes are: an incorrect size was used, the O-ring was twisted during installation, the seating groove or port was not properly cleaned, or there is damage to the mating surface. Remove the fitting, inspect all surfaces, and reinstall with a new O-ring following proper installation procedure.
Where can I find the full range of Caterpillar O-ring seals?
Browse the complete catalog of O-ring seals for heavy equipment at Propel Parts, featuring thousands of O-ring options in various materials and sizes for Caterpillar hydraulic, fuel, and engine system applications.

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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