Worldwide Shipping 
New 2S4078 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 2S4078 Seal O Ring
▶Specification for 2S4078 Seal O Ring
▶Exact Fit Guarantee for 2S4078 Seal O Ring
▶| Dimensions | 1.69x1.69x0.12 |
|---|
-
Grateful I found this company!
I’m grateful I found this company! They answer the phone every time plus the parts are packaged very well!! Even the angriest mailman couldn’t damage your parts! lol The parts showed up as planned and for being aftermarket the quality seems to be good!! The warranty is the same as CAT. Thank you Daniel!!! -
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!
-
Have been buying parts from them for years, and they have always delivered, both with parts and customer service.
-
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.
-
Propel parts is a good Cat vendor that provides a top notch service to customers from ordering to delivery. Their after sales service is really impressive.
Frequently Asked Questions
What is the Caterpillar 2S4078 seal O-ring used for?
The 2S4078 seal O-ring is designed to create a secure seal between connected components in Caterpillar equipment. It helps prevent leaks of oil, fuel, or hydraulic fluids while protecting internal systems from dust, moisture, and contaminants. A properly functioning O-ring helps maintain system pressure and supports reliable equipment performance.
Which Caterpillar equipment may use the 2S4078 seal O-ring?
Always confirm the 2S4078 part number in your equipment manual before ordering, as fitment may vary by machine model and configuration. Contact Propel Parts if you need assistance identifying the correct fit.
What are the signs that a Caterpillar seal O-ring needs replacement?
A worn or damaged 2S4078 seal O-ring can lead to several operational issues. Common signs include:
- Oil, fuel, or hydraulic fluid leaks around the sealing area
- Reduced pressure in the hydraulic or fluid system
- Visible cracks, flattening, or wear on the O-ring
- Dirt or contaminants entering the sealed component
Replacing worn seals early helps prevent component damage and costly repairs.
Does the 2S4078 seal O-ring meet performance standards?
The 2S4078 meets OEM performance standards and is built to handle the same demanding conditions as the original. Need help confirming compatibility? The Propel Parts team can help identify the correct fit for your application.
How do you install the 2S4078 seal O-ring?
Proper installation is important to ensure effective sealing. General installation steps include:
- Turn off the equipment and release any system pressure
- Disassemble the component where the O-ring is installed
- Carefully remove the worn or damaged O-ring
- Clean the sealing groove and surrounding surfaces
- Install the new 2S4078 O-ring in the correct position
- Reassemble the component and inspect for leaks
Always follow the manufacturer's service manual for detailed installation instructions.
How often should the 2S4078 seal O-ring be replaced?
Seal O-rings typically do not have a fixed replacement schedule. However, they should be inspected during routine maintenance, component servicing, or when fluid leaks are detected. Replacing worn 2S4078 seal O-rings helps maintain system pressure and reliable equipment performance.
Can I use a premium aftermarket 2S4078 seal O-ring replacement?
Yes, and many equipment operators prefer them. Premium aftermarket 2S4078 parts manufactured to meet or exceed OEM specs deliver comparable performance to original parts, often at a lower cost, while maintaining proper system function.
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
