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New 5B3718 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
Exact Fit Guarantee
This part is guaranteed to fit your machine.
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Description for 5B3718 Seal O Ring
â–¶Specification for 5B3718 Seal O Ring
â–¶Exact Fit Guarantee for 5B3718 Seal O Ring
â–¶| Dimensions | 1.18x1.18x0.20 |
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I have ordered from here a lot over the last couple years. Customer service has been great! Best place to get pins and bushings for your buckets! I will order from here again.
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When I had questions, they were answered quickly and kindly.
Thank you!! -
Awesome and diligent support. Would definitely recommend
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Great pricing and fast shipping!
I'll admit that I was skeptical of propel parts, but they are an honest site and came through with the order. I was skeptical because I've never ordered heavy machinery parts, and didn't know who to trust. The parts that I ordered showed in stock, but after checking with their vendor, they only had half of the order in stock. I was notified the day after the order, and most of the parts arrived in a few days. There was one part that was not shipped putz but I was able to talk with who I assumed is the owner who rectified the situation and had the part overnighted to me.
I will say that communication speed could use a little work, but they will eventually get back with you. -
Good Stuff.
We have had a couple shipping issues, but each time they made it right and we ended up getting what we need. Quality parts at half the price of OEM.
Frequently Asked Questions
What is the Caterpillar O-Ring 5B3718 used for?
The 5B3718 is an O-ring seal used in Caterpillar equipment to create fluid-tight connections in hydraulic fittings, engine ports, and fluid lines. It prevents leaks in both static and low-speed dynamic sealing environments where the specific dimensions of this O-ring match the required joint geometry.
Which Caterpillar machines use the 5B3718 O-Ring?
The 5B3718 is used across multiple Caterpillar equipment models in various sealing applications. For model-specific compatibility, check your parts manual or reach out to Propel Parts for help verifying fitment.
Is the 5B3718 a high-quality aftermarket seal?
Yes. The 5B3718 O-ring from Propel Parts is a premium aftermarket replacement that meets or exceeds OEM specifications for material composition, hardness, and dimensional tolerances. It provides the same reliable sealing performance as the original Caterpillar O-ring.
How do I identify the correct O-ring if my part number is worn off?
Measure the O-ring using a caliper ??? record the inner diameter and cross-section (thickness). You can then cross-reference these dimensions against Caterpillar O-ring charts or contact Propel Parts with your equipment model and the assembly/location information to help identify the correct replacement.
What lubricant is recommended when installing the 5B3718 O-Ring?
Use a small amount of the system fluid ??? clean hydraulic oil for hydraulic applications or clean diesel for fuel system applications ??? to lightly coat the O-ring before installation. This reduces friction and prevents tearing during seating, without compromising the seal's chemical compatibility.
How do I prevent twisting an O-ring during installation?
Apply lubricant evenly, stretch the O-ring gradually and symmetrically into the groove, and avoid rolling it in from one end. After seating, visually inspect the O-ring to ensure it is evenly positioned in the groove without any visible twisting or uneven cross-section. A twisted O-ring will leak even if the fitting is properly torqued.
Where can I find more seals and gaskets for Caterpillar equipment?
Propel Parts offers thousands of sealing components for CAT machines. Browse the complete seals and gaskets for heavy equipment category to find O-rings, oil seals, metal face seals, and complete gasket kits for your equipment's specific needs.
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®
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.
1 YEAR UNLIMITED WARRANTY
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EASY RETURNS & FAST REFUNDS
