New 5K9090 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 5K9090 Seal O Ring
â–¶Specification for 5K9090 Seal O Ring
â–¶Exact Fit Guarantee for 5K9090 Seal O Ring
â–¶| Dimensions | 1.06x1.06x0.04 |
|---|
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Brian You (Colorado, USA)100%Placed an order twice and immediately resolved!
Misty reched out immediately because I accidentally placed an order twice. Fantastic service. -
Clint Ayers (Kentucky, USA)100%Awesome and diligent support. Would definitely recommend
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RAY JAOUNI (Texas, USA)100%He was a great help with ordering and refunding the sales tax,
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Gen100%Amazing Help.
I don't know who I spoke with, but they were helpful. We will be buying those parts shortly. -
Racheal (Nigeria)100%To my country the company is doing great
The products they market is good and
Affordable.
They can delivery to any country, stree free.
Tested and trusted.
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.

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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