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New CAT 4C4784 (2701535) D-Ring Seal Kit Caterpillar Aftermarket for Caterpillar Equipment
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Description for 4C4784 Seal O Ring Kit
â–¶Specification for 4C4784 Seal O Ring Kit
â–¶Exact Fit Guarantee for 4C4784 Seal O Ring Kit
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Customer Reviews
I put 2 of the same orders in due to a web page error and shortly after I was contacted by Deb from customer service asking if I meant to place both orders. She was very helpful, the email was very well written and it genuinely made me feel better about the whole experience. She resolved the issue quickly and with there not being much of customer service these days I was very happy so see that is not the case everywhere!!!
Propel Parts provided quality parts for my Caterpillar needs at a very fair price. Shipping to my international location was very fast. took about a week for the parts to get here. Seller is also responsive with my inquiry.
Thanks again
They are great !
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.
Very thorough ! Confirmed order and great communications.
Great service affordable parts
Very knowledgeable and quick to quote parts.
Very quick to respond to parts quotes. Knowledgeable and Polite, and very quick shipping. Definitely will purchase parts from these guys in the future.
Cat blade pins.
Easy transaction good web site.
helpful and professional.
quick and professional service.
rapid response!
Product Questions
Frequently Asked Questions
What is the Caterpillar 4C4784 D-ring seal kit used for?
A: The 4C4784 D-ring seal kit is used to seal hydraulic connections in Caterpillar equipment. D-ring seals (also called boss seals) provide a reliable leak-proof connection at O-ring boss fittings in hydraulic systems, preventing fluid loss and contamination.
What is included in the 4C4784 D-ring seal kit?
A: This kit typically includes the D-ring seal and backup ring designed for use with specific Caterpillar O-ring boss (ORB) fittings. Check the product listing for complete contents or contact Propel Parts for details.
How do I know when D-ring seals need replacement?
A: Replace D-ring seals when you observe hydraulic fluid leaking at fitting connections, any disassembly of the fitting for service, or visible damage or hardening of the existing seal. D-ring seals are inexpensive insurance against hydraulic leaks.
Is this a high-quality aftermarket seal kit?
A: Yes. This is a premium high-quality aftermarket D-ring seal kit that meets or exceeds OEM specifications for material composition, dimensions, and pressure rating.
Browse our full selection of seals and gaskets for hydraulic and engine sealing applications across Caterpillar and other heavy equipment.
Which CAT machines is the 4C4784 seal kit compatible with?
A: This seal kit is used across a range of Caterpillar hydraulic systems. Check your parts manual or reach out to Propel Parts for help verifying fitment with your machine.
How do I install a D-ring seal correctly?
A: Clean the fitting and boss threads thoroughly. Apply a light coat of clean hydraulic fluid to the D-ring. Install the seal into the boss groove, then thread the fitting in by hand before torquing to the specification in your Caterpillar service documentation.
What warranty is included?
A: All Propel Parts products include a 12-month warranty from the invoice date against manufacturing and material defects. Same-day shipping is available on weekday orders placed by 3pm ET.
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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.
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