New 4R9999 Excluder-Cranksha Replacement suitable for Caterpillar Equipment

  • New Excluder-Cranksha Replacement suitable for Caterpillar Equipment
  • Made to USA Specification

Buy with Confidence: All parts are covered by our warranty

$6.00

4.7

(Site rating)
In Stock | Ships Out Today | Order By 3pm ET
SKU
4R9999CTP
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Description for 4R9999 Crankshaft Seal

This aftermarket Caterpillar 4R9999 Crankshaft Seal 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 Crankshaft Seal.
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 4R9999 Crankshaft Seal

Replacement Part Number(s): 4R-9999
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: 0.04 LBS | 0.02 KG
Dimensions: 4.33 x 4.33 x 0.39 (inches)
Condition: New

Exact Fit Guarantee for 4R9999 Crankshaft Seal

Looking for a reliable replacement Caterpillar 4R9999 Crankshaft Seal ? 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
Models 3116, 3126, 120H, 120H ES, 120H NA, 12H, 12M 2, 12M 3, 12M 3 AWD, 135H, 135H NA, 140G, 140M, 140M 2, 140M 3, 140M 3 AWD, 160M, 160M 2, 160M 3, 160M 3 AWD, 2290, 2390, 2391, 2491, 2590, 2864C, 30/30
Dimensions 4.33x4.33x0.39
Customer Reviews
  1. 100%
    Australian buyer, sales where professional and very responsive with secure parts identification.
    Highly recommend.
    Bedrock Exploration Pty Lt, Australia

    Customer Follow-Up After Delivery:

    Thank you Deb and your colleague Anthony A for your help in supplying a replacement part which arrived in good time and is running smoothly.
    I shall continue to use your services and recommend you to other remote miners, as your services and delivery times are better than our home-based suppliers.
    With thanks again.
    Regards, Gerard
  2. 100%
    Customer service was excellent today! I have never had a company go behind the scenes to see what was happening with my payment error and resolve it so I could complete my order without having to do it all over again. Hats off to Propel Parts!
  3. 100%
    Great service affordable parts
  4. 100%
    Steven & Propel Parts were a huge help! We were able to place a large order and get it shipped out same day to avoid a line down situation for a customer due to a lost component. The order was even submitted after the 3pm cutoff for same day shipments and we got it the next morning!
  5. 100%
    My part was damaged in shipping and everyone was very helpful on get it resolved and sent me another free of charge.
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Frequently Asked Questions

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What is the function of the 4R9999 crankshaft excluder in Caterpillar equipment?

The 4R9999 crankshaft excluder is designed to protect the crankshaft seal by preventing dirt, dust, and debris from entering the sealing area. It also helps retain engine oil inside the engine by supporting proper sealing around the crankshaft, which contributes to reliable engine performance and reduced contamination.

Which Caterpillar machines are compatible with the 4R9999 crankshaft excluder?

To ensure the 4R9999 is the correct fit for your machine, cross-reference the part number with your equipment manual or parts catalog. If you have any doubts, the Propel Parts team is available to point you in the right direction.

What does a crankshaft seal excluder do in an engine?

A crankshaft seal excluder works alongside the main crankshaft seal to keep contaminants away from the sealing surface. By blocking dust and debris while helping maintain oil retention, it reduces the risk of leaks and helps extend the service life of the engine's sealing components.

Does the 4R9999 crankshaft excluder meet OEM performance standards?

That\'s correct. The 4R9999 replacement is produced to meet OEM requirements and deliver the performance expected in heavy equipment applications. For any fitment questions, contact Propel Parts directly.

What are common signs of a worn or failing crankshaft seal excluder?

A damaged or worn crankshaft excluder may lead to several issues, including:

  1. Oil leaks near the crankshaft area
  2. Dirt or debris buildup around the seal
  3. Increased engine contamination
  4. Premature wear of the crankshaft seal

Regular inspection during engine maintenance can help detect these issues early.

How do you install the 4R9999 crankshaft excluder?

To install the 4R9999 Caterpillar crankshaft excluder, follow these general steps:

  1. Turn off the engine and allow it to cool completely
  2. Remove surrounding components to access the crankshaft seal area
  3. Carefully remove the worn excluder and inspect the seal surface
  4. Clean the mounting area to remove dirt or oil residue
  5. Install the new excluder in the correct position
  6. Reassemble the components and ensure proper alignment
  7. Start the engine and check for leaks or abnormal vibration

Always follow the service manual for torque specifications and installation procedures.

How can I verify the correct crankshaft seal excluder for my Caterpillar engine?

High-quality aftermarket 4R9999 parts designed to OEM specifications are a solid option for equipment owners seeking reliable performance at a competitive price. As long as the part meets or exceeds OEM standards, it\'s a confident choice.

Questions About this Part?
Have a question about fit, compatibility, shipping, warranty, or returns?

This 4R9999 Crankshaft Seal is compatible with the following models:
3116, 3126, 120H, 120H ES, 120H NA, 12H, 12M 2, 12M 3, 12M 3 AWD, 135H, 135H NA, 140G, 140M, 140M 2, 140M 3, 140M 3 AWD, 160M, 160M 2, 160M 3, 160M 3 AWD, 2290, 2390, 2391, 2491, 2590, 2864C, 30/30 & more...

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.