New 8N3666 Repair Kit-Compre Replacement suitable for Caterpillar Equipment
- New Repair Kit-Compre Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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This part is guaranteed to fit your machine.
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Description for 8N3666 Repair Kit
â–¶Specification for 8N3666 Repair Kit
â–¶Exact Fit Guarantee for 8N3666 Repair Kit
â–¶| Models | 1673C, 16G, 3176, 3176B, 3208, 3304, 3306, 3306B, 3306C, 3406, 3406B, 3406C, 3408, 3408C, 3408E, 3412, 3412E, 3512, 3512B, 3512C, 3516C, 5130, 5230, 613C, 627B, 627E, 631D, 631E, 631G, 633D, 633E II |
|---|---|
| Dimensions | 6.30x1.38x8.66 |
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He resolved all my doubts and gave me clear solutions.
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The Double Order Catastrophe
My co-worker placed an order and wasn't sure it went through online. I later placed the same order thinking the previous order didn't go through. To my surprise both orders went through, and I needed to cancel one of the orders. I called and spoke with someone who instructed me someone would contact me about the situation. I was contacted by Misty and she said she would do her best to cancel one of the orders but not sure if she could because they were next day orders. A small tome later I received an email saying she was able to cancel one of the orders. Thank you to Misty and the entire Propel Parts Team. Greatly appreciated!! -
Always helpful and great pricing
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They were great to deal with
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My part was damaged in shipping and everyone was very helpful on get it resolved and sent me another free of charge.
Frequently Asked Questions
What is the Caterpillar 8N3666 repair kit used for?
The 8N3666 repair kit is designed to help restore proper performance and sealing in Caterpillar equipment systems by providing replacement components commonly needed during maintenance or repair procedures.
What are the benefits of using a high-quality repair kit?
- Helps simplify maintenance and repair work
- Supports reliable equipment performance
- Reduces downtime caused by worn components
What are common signs that a repair kit may be needed?
Common signs include leaks, pressure loss, worn seals, reduced system performance, or visible wear on internal components.
Why are repair kits important in preventive maintenance?
Repair kits help replace multiple worn components at once, improving system reliability and reducing the risk of future failures.
Is the 8N3666 repair kit compatible with multiple Caterpillar machines?
Yes, this repair kit may fit various Caterpillar equipment applications depending on machine configuration. Check your manual or reach out to Propel Parts for help verifying fitment.
Are aftermarket repair kits dependable?
Yes. High-quality aftermarket repair kits that meet or exceed OEM specifications provide reliable performance and durability in demanding heavy equipment applications.
Are related sealing components commonly included in repair procedures?
Yes, products such as the Caterpillar 1011983 backup ring are commonly used in related repair and sealing assemblies.
This 8N3666 Repair Kit is compatible with the following models:
1673C, 16G, 3176, 3176B, 3208, 3304, 3306, 3306B, 3306C, 3406, 3406B, 3406C, 3408, 3408C, 3408E, 3412, 3412E, 3512, 3512B, 3512C, 3516C, 5130, 5230, 613C, 627B, 627E, 631D, 631E, 631G, 633D, 633E II & 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.
Exact Fit Guarantee®
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