New 5D5957 Seal O Ring Replacement suitable for Caterpillar Equipment
- New Seal O Ring Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 5D5957 Seal O Ring
â–¶Specification for 5D5957 Seal O Ring
â–¶Exact Fit Guarantee for 5D5957 Seal O Ring
â–¶| Dimensions | 4.37x4.37x0.14 |
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Everything fine, thank you. The only thing with which I had a problem in your Software, is that when I have more than 10 different items on the list, I can't scroll to the first ones. But besides that, I am very happy in going on with buying your parts.
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They are great !
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Fast communication, and very Helpful!
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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 -
Excelente atencion y refacciones de calidad
Frequently Asked Questions
What is the Caterpillar O-Ring 5D5957 used for?
The 5D5957 is a sealing O-ring used in Caterpillar equipment to prevent fluid leakage in hydraulic systems, engine oil passages, and fuel system connections. It provides a pressure-tight seal at ports, fittings, and joints where fluid containment is critical for safe and efficient operation.
Which Caterpillar models use the 5D5957 O-Ring?
This O-ring is compatible with multiple Caterpillar machines and engine platforms. For confirmed model compatibility, cross-reference the part number in your equipment's parts manual or reach out to Propel Parts for help verifying fitment.
Is the 5D5957 O-Ring a high-quality aftermarket replacement?
Yes. The 5D5957 from Propel Parts is a premium aftermarket O-ring that meets or exceeds OEM specifications for material hardness, chemical resistance, and dimensional accuracy. It delivers reliable sealing performance in the intended Caterpillar application.
What is the operating temperature range for this O-ring?
The temperature range depends on the specific elastomer material of the O-ring. Caterpillar hydraulic and engine O-rings are typically rated for the full operating temperature range of the systems they seal. For precise specifications, refer to the product data or your service manual.
What should I do if the O-ring groove is damaged?
If the O-ring groove shows burrs, scratches, or corrosion, address this before installing a new O-ring. Light scratches can sometimes be polished smooth; deeper damage may require machining the groove or replacing the component. A damaged groove will cause the new O-ring to fail prematurely regardless of its quality.
Can I buy multiple O-rings at once for maintenance stock?
Yes. For maintenance-minded operators and fleet managers, stocking a range of common O-ring sizes is a smart way to minimize downtime. Browse the full catalog of O-ring seals for heavy equipment at Propel Parts to find the right O-rings in bulk-friendly quantities for your maintenance program.
What is the difference between static and dynamic O-ring applications?
A static O-ring seals a joint where there is no relative movement between the mating parts ??? such as a pipe fitting or cap. A dynamic O-ring seals around a moving element, such as a reciprocating hydraulic cylinder rod. Dynamic applications require slightly different groove dimensions and harder durometer materials to handle wear from movement.

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.

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.

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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