New 2M5173 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 2M5173 Seal O Ring
▶Specification for 2M5173 Seal O Ring
▶Exact Fit Guarantee for 2M5173 Seal O Ring
▶| Dimensions | 5.51x5.51x0.39 |
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prompt clear replies
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They were great to deal with
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I would give 5 stars but my first time ordering from here and using aftermarket parts. The price is reasonable comparing to original Cat parts and the customer support is great and hoping to do more business with them
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Good Customer Service. Fast Shipping. A+++
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Great service at an affordable price to get my machine back going.
Frequently Asked Questions
What is the 2M5173 O-ring seal used for?
The 2M5173 O-ring seal sits in a groove and is compressed between two surfaces to block fluid or air leakage. Its elasticity is what creates a tight, reliable seal.
How do I install the 2M5173 O-ring seal?
Fitting the 2M5173 correctly comes down to clean surfaces and following the manual’s sequence. Work through these steps:
- Depressurize the system and shut the machine down before service
- Remove the old O-ring and clean the groove thoroughly
- Inspect the groove and mating face for nicks or debris
- Lubricate the 2M5173 as directed and seat it evenly in the groove
- Reassemble carefully so the O-ring isn’t pinched, then check for leaks
Which Caterpillar machines is the 2M5173 compatible with?
The 2M5173 O-ring seal is used across many Caterpillar applications, but the correct fit depends on your exact model and assembly. Always cross-check fitment using your service manual or part reference guide before ordering. Please reach out to Propel Parts for help verifying fitment.
Does the 2M5173 O-ring seal meet performance standards?
Yes. The 2M5173 is built to meet OEM specifications for fit, strength, and service life. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications to keep the assembly protected.
How often should the 2M5173 be replaced?
Service life for the 2M5173 depends on operating conditions and load. Replace it on inspection findings or at the interval your manual specifies rather than waiting for a failure. This part is commonly replaced alongside the 5M2997 Seal, so it is worth checking both while the assembly is open.
What are the signs of a worn or failing 2M5173 O-ring seal?
When the 2M5173 reaches the end of its service life, the symptoms tend to show up first as performance or wear issues. Look for:
- Leaks or weeping at the sealed connection
- A flattened, nicked, or hardened ring on removal
- Loss of pressure in the circuit
- Swelling or extrusion from the groove
Why is the 2M5173 O-ring seal important, and what related part is commonly replaced with it?
Replacing the 2M5173 when needed keeps the system within its designed clearances and loads, which extends the life of the surrounding parts and supports dependable performance. The 9M0057 Gasket is commonly serviced together with this part, so it is worth replacing both while access is available.

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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