Worldwide Shipping
New 5K9090 Seal O Ring Replacement suitable for Caterpillar Equipment
Exact Fit Guarantee
This part is guaranteed to fit your machine.
Wrong Part?
We'll overnight correct part at no cost to you.
Secure Checkout
•
Trusted Since 2012
Details
Description for 5K9090 Seal O Ring
â–¶Specification for 5K9090 Seal O Ring
â–¶Exact Fit Guarantee for 5K9090 Seal O Ring
â–¶Reviews
Customer Reviews
Excellent and prompt response.
Propel parts team helped me greatly regarding a special request and I always get prompt response.
They’re fantastic!
Great customer services, the best
Original Review (Spanish)
Si necesitas piezas de repuesto a buen precio para tu m?quina grande y quieres un servicio al cliente atento, esta tienda es una muy buena opci?n.
English Translation
If you need affordable replacement parts for your heavy equipment and want attentive customer service, this store is a very good option.
Australian buyer, sales where professional and very responsive with secure parts identification.
Highly recommend.
Bedrock Exploration Pty Lt, Australia
Customer Follow-Up After Delivery:
Thank you Deb and your colleague Anthony A for your help in supplying a replacement part which arrived in good time and is running smoothly.
I shall continue to use your services and recommend you to other remote miners, as your services and delivery times are better than our home-based suppliers.
With thanks again.
Regards, Gerard
Excellent experience.
Mike has been very helpful. I am looking forward to keep doing business with them
I almost want to cry ;( writing this review because I dont want people to find out about them and rather keep them in my pocket but they deserve it…
This company is great with Quality Products at amazing prices! Sometimes, their website is not the most accurate but is user friendly and if you got questions they will call back and are very prompt in responding via a call or text to verify inventory before placing an order.
I really appreciate and look forward to continuing to work with you all especially Anthony — he is amazing & the best!!!
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.
100% excelente
Great customer service!
Have been buying parts from them for years, and they have always delivered, both with parts and customer service.
Product Questions
Frequently Asked Questions
What is the Caterpillar 5K9090 seal O-ring used for?
The 5K9090 seal O-ring is designed to create a secure seal between connected components in Caterpillar equipment systems. It helps prevent leaks, maintain pressure, and reduce contamination in hydraulic and engine applications.
What are common signs of a failing O-ring?
Common signs include fluid leaks, cracking, flattening, hardening, or reduced sealing performance. Replacing worn O-rings early can help avoid costly equipment downtime.
Is the 5K9090 O-ring compatible with multiple Caterpillar machines?
- Yes, this O-ring may fit a range of Caterpillar equipment applications depending on the machine model and system configuration.
- It is commonly used in sealing applications where leak prevention and pressure integrity are required.
- Check your manual or reach out to Propel Parts for help verifying fitment.
Why is proper sealing important in heavy equipment systems?
Proper sealing helps maintain system pressure, prevents fluid loss, protects internal components from contamination, and supports overall equipment reliability.
Can harsh operating conditions affect O-ring lifespan?
Yes. Exposure to heat, pressure fluctuations, chemicals, and demanding operating environments can gradually reduce sealing performance over time.
Are aftermarket replacement O-rings reliable?
Yes. High-quality aftermarket sealing components that meet or exceed OEM specifications can provide dependable durability and long-lasting sealing performance.
Should O-rings be replaced during preventive maintenance?
Yes, inspecting and replacing worn sealing components during scheduled maintenance can help reduce unexpected failures and improve equipment efficiency.
Are there related Caterpillar sealing components commonly used in similar applications?
Yes, parts such as the Caterpillar 6V5391 seal O-ring may also be used in related hydraulic and engine sealing applications.
Shipping | Returns
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.
Exact Fit Guarantee
Exact Fit Guarantee®
The right part — or we'll make it right.
Order Normally
Know your part number?
Simply place your order.
Not Sure?
Place your order, then send us your serial number before it ships.
We'll verify fit.
We Make It Right
Wrong part? We'll make it right.Fast. At our expense.