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

$0.17

4.7

(Site rating)
In Stock | Ships Out Today | Order By 3pm ET
SKU
2S4078CTP
Pay with
visa
mastercard
amex
discover
For Easy Checkout | Select Your Card

Description for 2S4078 Seal O Ring

This aftermarket Caterpillar 2S4078 Seal O Ring is built to meet U.S. OEM specifications for durability and performance. At Propel Parts, we perform strict quality checks to ensure it fits and functions like your original Caterpillar Seal O Ring.
Direct Replacement: Engineered for a precise fit in Caterpillar equipment.
OEM-Spec Quality: Manufactured to match the performance of your original part.
Tested Reliability: Strict quality checks are performed before shipping.

Specification for 2S4078 Seal O Ring

Replacement Part Number(s): 2S-4078
Specifications: Aftermarket Part | US OEM Specs.
Shipping: Same Day (Weekdays) | Order by 3pm.
Warranty: Unlimited Mileage | 1 Year Warranty.
Core: No Core Required | No Core Charge.
Weight: 0.01 LBS | 0.00 KG
Dimensions: 1.69 x 1.69 x 0.12 (inches)
Condition: New

Exact Fit Guarantee for 2S4078 Seal O Ring

Looking for a reliable replacement Caterpillar 2S4078 Seal O Ring ? Order with confidence through our Exact Fit Guarantee.
Verified Fit: Before we ship, we check your part against CAT SIS (Caterpillar Service Information System) to confirm it's the correct match for your machine.
Peace of Mind: If it isn't the right fit, we'll contact you with the correct Caterpillar part number before your order goes out.
Exclusive Guarantee: Enroll in our Exact Fit Guarantee at checkout to ensure you get the part you need the first time.
More Information
Dimensions 1.69x1.69x0.12
Customer Reviews
  1. 100%
    Very nice job
  2. 100%
    Awesome and diligent support. Would definitely recommend
  3. 100%
    Customer Service.
    I recently had to cancel an order with Propel Parts, and I was thoroughly impressed by the prompt and efficient service I received. Steven handled my request with professionalism and speed, ensuring a hassle-free process. I've purchased parts from Propel Parts before and have never been disappointed. Their consistent reliability and excellent customer service keep me coming back.
  4. 100%
    Quick and efficient.
    Great products and a great team to deal with. We had a small issue with a missing part and the Customer Services Team dealt with it quickly and efficiently and in a way which left me, the customer, feeling entirely satisfied. Would highly recommend.
  5. 100%
    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!!!
Write Your Own Review
You're reviewing:New 2S4078 Seal O Ring Replacement suitable for Caterpillar Equipment
Your Rating

Frequently Asked Questions

Blog

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:

  1. Oil, fuel, or hydraulic fluid leaks around the sealing area
  2. Reduced pressure in the hydraulic or fluid system
  3. Visible cracks, flattening, or wear on the O-ring
  4. 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:

  1. Turn off the equipment and release any system pressure
  2. Disassemble the component where the O-ring is installed
  3. Carefully remove the worn or damaged O-ring
  4. Clean the sealing groove and surrounding surfaces
  5. Install the new 2S4078 O-ring in the correct position
  6. 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.

Questions About this Part?
Have a question about fit, compatibility, shipping, warranty, or 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.