New 3S9643 Seal, Oil Replacement suitable for Caterpillar 834S, 834U, 814F, 814F II, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 844, 844H, 854G, 854K, 621E, 621F, 623E, 623F, 627E, 627F, 627G, 637D, 637E, 637G, 651E, 657, 657B, 657E, 657G, 621B, 621E, 6

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New 3S9643 Seal, Oil Replacement suitable for Caterpillar 834S, 834U, 814F, 814F II, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 844, 844H, 854G, 854K, 621E, 621F, 623E, 623F, 627E, 627F, 627G, 637D, 637E, 637G, 651E, 657, 657B, 657E, 657G, 621B, 621E, 6

Name: New 3S9643 Seal, Oil Replacement suitable for Caterpillar 834S, 834U, 814F, 814F II, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 844, 844H, 854G, 854K, 621E, 621F, 623E, 623F, 627E, 627F, 627G, 637D, 637E, 637G, 651E, 657, 657B, 657E, 657G, 621B, 621E, 6
Brand: Aftermarket CAT
SKU: 3S9643CTP
Price: 4.11 USD
Availability: InStock
Rating: 4.7 (110 reviews)

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New Seal, Oil Replacement suitable for Caterpillar Equipment
Made to USA Specification

Buy with Confidence: All parts are covered by our warranty

$4.11

Six Month Financing

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4.7

(Site rating)

In Stock | Ships Out Today | Order By 3pm ET

SKU

3S9643CTP

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Details

Description for 3S9643 Seal, Oil

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This aftermarket Caterpillar 3S9643 Seal, Oil is built to meet U.S. OEM specifications for durability and performance. At Propel Parts, we perform strict quality checks to ensure it fits and functions like your original Caterpillar Seal, Oil.

Direct Replacement: Engineered for a precise fit in Caterpillar equipment.

OEM-Spec Quality: Manufactured to match the performance of your original part.

Tested Reliability: Strict quality checks are performed before shipping.

Specification for 3S9643 Seal, Oil

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Replacement Part Number(s): 3S-9643

Specifications: Aftermarket Part | US OEM Specs.

Shipping: Same Day (Weekdays) | Order by 3pm.

Warranty: Unlimited Mileage | 1 Year Warranty.

Core: No Core Required | No Core Charge.

Weight: 0.05

Condition: New

Compatible Models for 3S9643 Seal, Oil

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This 3S9643 Seal, Oil is compatible with the following models:
6, 621B, 621E, 621F, 623E, 623F, 627E, 627F, 627G, 637D, 637E, 637G, 651E, 657, 657B, 657E, 657G, 814F, 814F II, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 834S, 834U, 844, 844H, 854G, 854K & more...

Exact Fit Guarantee for 3S9643 Seal, Oil

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Looking for a reliable replacement Caterpillar 3S9643 Seal, Oil ? Order with confidence through our Exact Fit Guarantee.

Verified Fit: Before we ship, we check your part against CAT SIS (Caterpillar Service Information System) to confirm it's the correct match for your machine.

Peace of Mind: If it isn't the right fit, we'll contact you with the correct Caterpillar part number before your order goes out.

Exclusive Guarantee: Enroll in our Exact Fit Guarantee at checkout to ensure you get the part you need the first time.

More Information

More Information
Models	6, 621B, 621E, 621F, 623E, 623F, 627E, 627F, 627G, 637D, 637E, 637G, 651E, 657, 657B, 657E, 657G, 814F, 814F II, 824C, 824G, 824G II, 824H, 834B, 834G, 834H, 834S, 834U, 844, 844H, 854G, 854K & more
Dimensions	2.64x2.64x0.24

Reviews

Customer Reviews

Clint Ayers (Kentucky, USA) 06/20/2025

100%

Awesome and diligent support. Would definitely recommend
Enrique Arango 04/11/2024

100%

Excelente servicio rapido, responsable y confiable
Verified Buyer 11/29/2023

100%

Have been buying parts from them for years, and they have always delivered, both with parts and customer service.
FMHERS, Inc. (Texas, USA) 03/01/2024

100%

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!
Susan 12/29/2023

100%

Very knowledgeable and quick to quote parts.
Very quick to respond to parts quotes. Knowledgeable and Polite, and very quick shipping. Definitely will purchase parts from these guys in the future.

Product Questions

Customer Questions and Answers

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Compatible Models

Returns & Warranty

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.

Shipping

Same Day Shipping

Orders placed weekdays, by 3pm ET, ship out same day.

United States & Canada

Click Check Delivery Times for discounted Ground, 2-Day & Overnight rates

International Shipping

We have served customers in over 90 countries. Click Check Delivery Time .

Tracking Number

Tracking will be emailed within 24-48 hours of your order.

Customer Reviews

★★★★★

01/24/2025

Excellent service and quick response!

Diego Romero (Uruguay)

★★★★★

11/17/2022

Good Stuff. We have had a couple shipping issues, but each time they made it right and we ended up getting what we need. Quality parts at half the price of OEM.

Alex (Oklahoma, USA)

★★★★★

11/30/2023

Great people! Good and fast service. Always looking to help get what you need! 10/10 ????????

Orlando Marquez (Texas, USA)

★★★★★

03/22/2024

Stevens the man. Placed my order and sent him the order # and had me in the loop within an hour.

Clint Ayers (Kentucky, USA)

★★★★★

01/03/2024

Excellent experience. Mike has been very helpful. I am looking forward to keep doing business with them

Eliana Rivadeneira (Florida, USA)

★★★★☆

10/06/2025

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.

Walter Aguirre-Spika (Florida, USA)

★★★★★

04/24/2025

rapid response!

Nathan Peterson (California, USA)

★★★★★

01/05/2026

Original Review (Portuguese) Muito bom atendimento Ótima empresa English Translation Very good service. Excellent company.

Mauricio Rodrigues (Portugal)

★★★★★

11/10/2022

Been buying from them for years and have almost never had an issue. The few times I had a question or something to handle, they have shown amazing customer service. Great product and a great company.

Verified Buyer

★★★★★

10/03/2025

Had a great experience with ordering correct engine gaskets for our 3208 caterpillar engine

David E. Kersey (Kentucky, USA)

QUALITY GUARANTEED

1 YEAR UNLIMITED WARRANTY

SAME DAY SHIPPING

ORDER BY 3PM EST. EXCL. WEEKEND

PRICE GUARANTEED

NO CORE OR EXCHANGE CHARGES

NO HASSLE RETURNS