New 8M4991 Seal O Ring Replacement suitable for Caterpillar Equipment

$0.48
In Stock • Ships Today • Order By 3pm ET
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Description for 8M4991 Seal O Ring

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This aftermarket Caterpillar 8M4991 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 8M4991 Seal O Ring

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Replacement Part Number(s): 8M-4991
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: 1.50 x 1.50 x 0.20 (inches)
Condition: New

Exact Fit Guarantee for 8M4991 Seal O Ring

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Looking for a reliable replacement Caterpillar 8M4991 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.
Reviews

Customer Reviews

★★★★★

Amazing service, emails answered very quickly with simple straight forward answers. Haven’t received the parts yet but ordering them was quick and easy.

★★★★★

Great prices prompt courteous customer service and fast shipping.

★★★★★

Great company to deal with. Answered my questions with detail and shipped me the part in good time! I will be dealing with them more in the future!

★★★★★

Very thorough ! Confirmed order and great communications.

★★★★★

Quick Response. Very much appreciated.

★★★★★

Great service!

★★★★★

Prompt service, Friendly people and hassle free

★★★★★

perfect service

★★★★★

Very nice job

★★★★★

Awesome and diligent support. Would definitely recommend

Product Questions

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.

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

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