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New 8M4991 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.
Wrong Part?
We'll overnight correct part at no cost to you.
Description for 8M4991 Seal O Ring
â–¶Specification for 8M4991 Seal O Ring
â–¶Exact Fit Guarantee for 8M4991 Seal O Ring
â–¶| Dimensions | 1.50x1.50x0.20 |
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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!!! -
100% excelente
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Stevens the man. Placed my order and sent him the order # and had me in the loop within an hour.
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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. -
Excelente atencion y refacciones de calidad
Frequently Asked Questions
What is the Caterpillar 8M4991 seal O-ring used for?
The Caterpillar 8M4991 seal O-ring is a high-quality aftermarket sealing component designed to help prevent leaks and support reliable sealing performance in heavy equipment systems. It is manufactured to meet or exceed OEM specifications for durability and dependable operation.
What are the benefits of the 8M4991 seal O-ring?
- Helps create reliable leak-resistant seals
- Supports proper pressure and fluid retention
- Manufactured from durable sealing materials
- Designed to meet or exceed OEM specifications
- Helps protect systems from contamination and fluid loss
Is the 8M4991 O-ring compatible with multiple Caterpillar applications?
Yes, this seal O-ring may fit various Caterpillar equipment models depending on the system configuration and sealing requirements. If you are unsure don’t hesitate to reach out to Propel Parts for help verifying fitment.
Why is replacing worn O-rings important?
Replacing worn O-rings helps prevent leaks, pressure loss, contamination, and unnecessary wear on nearby components, helping maintain reliable equipment operation.
Does the 8M4991 seal O-ring meet OEM standards?
Yes, this aftermarket replacement is designed to meet or exceed OEM specifications for fit, sealing performance, and long-lasting durability.
Can damaged O-rings affect equipment reliability?
Yes. Damaged or deteriorated O-rings may contribute to fluid leakage, contamination, reduced system pressure, and increased maintenance needs.
Are related Caterpillar sealing products available from Propel Parts?
Yes. Propel Parts offers a wide selection of replacement seals and O-rings for Caterpillar equipment. You can also check the Caterpillar Equipment Seal O-Ring 6V2699 for another related sealing solution.
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
ORDER BY 3PM EST. EXCL. WEEKEND
NO CORE OR EXCHANGE CHARGES
EASY RETURNS & FAST REFUNDS
