New 8T6850 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 8T6850 Seal O Ring
â–¶Specification for 8T6850 Seal O Ring
â–¶Exact Fit Guarantee for 8T6850 Seal O Ring
â–¶| Dimensions | 0.67x0.67x0.12 |
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Great company with outstanding customer service. Always get answers to my questions and always get my order to me quickly!
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Customer service was excellent today! I have never had a company go behind the scenes to see what was happening with my payment error and resolve it so I could complete my order without having to do it all over again. Hats off to Propel Parts!
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They were great to deal with
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Great customer services, the best
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Very helpful. Every question or request I had was answered quickly. I didn't have a parts book for my excavator but that was no problem for them. If you need parts for your Cat, give them a shot.
Frequently Asked Questions
What is the 8T6850 O-ring seal used for?
The 8T6850 is an O-ring style seal used to prevent leaks at a joint or connection. Correct sizing and material let it hold pressure without hardening or extruding.
How do I install the 8T6850 O-ring seal?
Fitting the 8T6850 correctly comes down to clean surfaces and following the manual sequence. Work through these steps:
- Depressurize the system and shut the machine down before service
- Remove the old O-ring and clean the groove thoroughly
- Inspect the groove and mating face for nicks or debris
- Lubricate the 8T6850 as directed and seat it evenly in the groove
- Reassemble carefully so the O-ring isn't pinched, then check for leaks
Which Caterpillar machines is the 8T6850 compatible with?
Compatibility for the 8T6850 O-ring seal varies by machine and configuration, so cross-check it for your Caterpillar equipment before ordering. Check your manual or reach out to Propel Parts for help verifying fitment.
Does the 8T6850 O-ring seal meet performance standards?
Yes. The 8T6850 is engineered to meet OEM specifications for material, dimensions, and durability. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications so the part performs the way it was designed to.
How often should the 8T6850 be replaced?
The 8T6850 is typically renewed during scheduled service or a related repair. In demanding, high-hour operation, inspect it more often to stay ahead of wear.
What are the signs of a worn or failing 8T6850 O-ring seal?
When the 8T6850 reaches the end of its service life, the symptoms tend to show up first as performance or wear issues. Look for:
- Leaks or weeping at the sealed connection
- A flattened, nicked, or hardened ring on removal
- Loss of pressure in the circuit
- Swelling or extrusion from the groove
Why is the 8T6850 important, and what related parts work with it?
Replacing the 8T6850 when needed keeps the system within its designed clearances and loads, which extends the life of the surrounding parts and supports dependable performance. Related hardware on our site includes 2W0282 Seal and CTP3306001C Rebuild Overhaul Gasket Kit D6d D6e D6h 12g 12h 14g 14h 140g 528 2.

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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