Worldwide Shipping 
New 6V3908 Seal O Ring Replacement suitable for Caterpillar Equipment
- New Seal O Ring Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
4.7
(Site rating)Description for 6V3908 Seal O Ring
â–¶Specification for 6V3908 Seal O Ring
â–¶Exact Fit Guarantee for 6V3908 Seal O Ring
â–¶| Dimensions | 4.37x4.37x1.97 |
|---|
-
Everything fine, thank you. The only thing with which I had a problem in your Software, is that when I have more than 10 different items on the list, I can't scroll to the first ones. But besides that, I am very happy in going on with buying your parts.
-
I would give 5 stars but my first time ordering from here and using aftermarket parts. The price is reasonable comparing to original Cat parts and the customer support is great and hoping to do more business with them
-
Steven & Propel Parts were a huge help! We were able to place a large order and get it shipped out same day to avoid a line down situation for a customer due to a lost component. The order was even submitted after the 3pm cutoff for same day shipments and we got it the next morning!
-
This is a great company to work with. Our sales associate Anthony quickly located the correct part and sent it out right away.
-
Great site and price
Frequently Asked Questions
What is the Caterpillar O-Ring 6V3908 and where is it used?
The 6V3908 is a Caterpillar O-ring seal used in hydraulic fittings, engine ports, and fluid line connections on various CAT machines. It provides a reliable pressure-tight seal to prevent leaks in both static and dynamic sealing applications. It is a commonly needed maintenance part during hydraulic system repairs and engine overhauls.
How often should O-rings be replaced on Caterpillar equipment?
O-rings do not have a fixed replacement interval but should be replaced any time a joint or fitting is opened during service. Additionally, inspect accessible O-rings during scheduled maintenance for signs of cracking, hardening, or weeping. In hot climates or harsh chemical environments, accelerated degradation is common.
Is the 6V3908 a high-quality aftermarket seal?
Yes. This O-ring meets or exceeds OEM specifications for dimensional accuracy, material hardness, and chemical resistance. It is manufactured to perform reliably in Caterpillar equipment's specific pressure and temperature ranges.
What CAT models use the 6V3908 O-Ring?
This O-ring fits a variety of Caterpillar machines depending on the joint or fitting it is used in. For exact model compatibility, cross-reference your machine's parts manual or reach out to Propel Parts ??? our team will help you confirm the right seal for your application.
What is the correct way to install an O-ring without damaging it?
Clean the O-ring groove thoroughly, inspect it for burrs or damage, lightly coat the new O-ring with the appropriate lubricant, and install it without twisting or stretching. Use fingers or a non-sharp tool to seat it properly. Never use screwdrivers or metal tools that could nick the sealing surface.
Can a damaged O-ring cause major equipment damage?
Yes. A failed O-ring in a hydraulic circuit can cause rapid fluid loss, leading to system pressure loss, inability to lift or control attachments, or overheating of hydraulic components. In an engine oil circuit, a failed O-ring can cause dangerous oil pressure loss. Address oil leaks promptly to avoid compounding damage.
Where can I find a full range of seals and gaskets for Caterpillar equipment?
For a comprehensive selection of sealing solutions, visit the seals and gaskets for heavy equipment category at Propel Parts, where you'll find O-rings, oil seals, metal face seals, overhaul kits, and more for CAT machines.
Shipping
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.
Easy Returns
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.
Warranty
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.
1 YEAR UNLIMITED WARRANTY
ORDER BY 3PM EST. EXCL. WEEKEND
NO CORE OR EXCHANGE CHARGES
EASY RETURNS & FAST REFUNDS
