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New 6H3999 Seal-Oil Replacement suitable for Caterpillar 824G, 824G II, 824H, 966G, 966G II, 966H, 972G, 972G II, 972H, 980C, 980F, 980G, 980G II, 980H, 3176C, 3196, 3306, 3406, 3406B, 3406C, 3406E, C-12, C-13, C11, C13, C15, 826C, 826G, 826G II, 826H, 82
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Description for 6H3999 Oil Seal
â–¶Specification for 6H3999 Oil Seal
â–¶Exact Fit Guarantee for 6H3999 Oil Seal
â–¶Reviews
Customer Reviews
customer service and parts availability is fantastic
The customer care response was very awesome. It was more than what I expected
The customer care response was very effective and timely
The response time was amazing
The availability of most of the parts that I wanted was also very awesome
Thanks keep it up
This is a great company to work with. Our sales associate Anthony quickly located the correct part and sent it out right away.
Quality Caterpillar parts
Very fast delivery and respons from Propel Parts
This is my second time that I bought something from it, first time delivery time was in one week from US to Serbia
Great company with outstanding customer service. Always get answers to my questions and always get my order to me quickly!
Stevens the man. Placed my order and sent him the order # and had me in the loop within an hour.
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
Great customer service!
Excellent customer service and parts.
You guys have always gave excellent customer service!!! Very prompt responsiveness. Warranty services are superb. I have been using them for quite awhile now on equipment I have. Always great prices for parts! Keep up the great work guy's
Great pricing and fast shipping!
I'll admit that I was skeptical of propel parts, but they are an honest site and came through with the order. I was skeptical because I've never ordered heavy machinery parts, and didn't know who to trust. The parts that I ordered showed in stock, but after checking with their vendor, they only had half of the order in stock. I was notified the day after the order, and most of the parts arrived in a few days. There was one part that was not shipped putz but I was able to talk with who I assumed is the owner who rectified the situation and had the part overnighted to me.
I will say that communication speed could use a little work, but they will eventually get back with you.
Product Questions
Compatible Models
This 6H3999 Oil Seal is compatible with the following models:
3176C, 3196, 3306, 3406, 3406B, 3406C, 3406E, 82, 824G, 824G II, 824H, 826C, 826G, 826G II, 826H, 966G, 966G II, 966H, 972G, 972G II, 972H, 980C, 980F, 980G, 980G II, 980H, C-12, C-13, C11, C13, C15 & more...
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.
Exact Fit Guarantee
Exact Fit Guarantee®
The right part — or we'll make it right.
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Wrong part? We'll make it right.Fast. At our expense.