New 2300940 Seal Replacement suitable for Caterpillar 3408, 3408C, 3408E, 3412D, 3412E, C175-
- New Seal Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 2300940 Seal Ring
â–¶Specification for 2300940 Seal Ring
â–¶Exact Fit Guarantee for 2300940 Seal Ring
â–¶| Models | 3408, 3408C, 3408E, 3412D, 3412E, C175 & more |
|---|---|
| Dimensions | 7.00x9.00x0.08 |
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I made my first purchase from Propel Parts last week. I was very happy with the response time and the delivery was fast, fast, fast! Also, the quality of the product is superb and at a great low price.
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Excellant customer service!
The prices are very good! The customer service is excellant! I had to contact them because our tax info wasn't right and they refunded it on the spot! Great job! we will be doing a lot more ordering from thi company. Highly recommended!
Frequently Asked Questions
What is the Caterpillar 2300940 seal used for?
A: The 2300940 is an engine seal used in Caterpillar 3408, 3408C, 3408E, 3412D, 3412E, and C175 series engines to prevent oil or coolant leaks between critical engine components. Engine seals maintain internal pressure and protect against contamination, which is vital for engine longevity.
Which Caterpillar engines is the 2300940 compatible with?
A: This seal is compatible with Caterpillar 3408, 3408C, 3408E, 3412D, 3412E, and C175 engines. Always cross-check the part number against your engine's serial number to confirm correct fitment. If you are still unsure, reach out to Propel Parts ??? our team will be happy to help you verify if this part fits your equipment.
How do I know when this engine seal needs to be replaced?
A: Look for oil or coolant seeping from the joint where the seal is located, a drop in oil or coolant levels, overheating, and blue or white smoke from the exhaust. Proactive replacement during major service intervals helps avoid unexpected failures.
Is the 2300940 a high-quality aftermarket part?
A: Yes. This is a premium high-quality aftermarket seal engineered to meet or exceed OEM specifications for the 3408 and 3412 engine families. It provides a reliable, direct-fit replacement for the original Caterpillar seal.
For the complete range of engine seals and gaskets, browse our dedicated category page.
What material is the 2300940 seal made from?
A: This seal is manufactured from high-grade elastomeric or composite material suited for the thermal and pressure demands of large Caterpillar diesel engines. The material resists oil, heat, and chemical exposure to ensure long service life.
Can this seal be installed without removing the engine?
A: Depending on the specific location of the seal within the engine, some seals can be replaced with the engine in the machine while others require engine removal. Refer to the Caterpillar service manual for the specific procedure for the 2300940 seal.
Does Propel Parts warrant this seal?
A: Yes. All products from Propel Parts include a 12-month warranty against manufacturing and material defects from the invoice date. Same-day shipping on weekday orders placed by 3pm ET.
This 2300940 Seal Ring is compatible with the following models:
3408, 3408C, 3408E, 3412D, 3412E, C175 & more...

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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