New 4N5906 Spring-Valve Replacement suitable for Caterpillar Equipment
- New Spring-Valve Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 4N5906 Engine Valve Spring
â–¶Specification for 4N5906 Engine Valve Spring
â–¶Exact Fit Guarantee for 4N5906 Engine Valve Spring
â–¶| Models | 3406, 3406B, 3406C, 3408, 3408B, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3516B, 16G, 245, 24H, 5110B, 589, 621, 621B, 621F, 623E, 623F, 627B, 627E, 627F, 631D, 631E, 631G, 633E II, 637D, 637E, 637G |
|---|---|
| Dimensions | 2.52x1.22x1.22 |
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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.
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I put 2 of the same orders in due to a web page error and shortly after I was contacted by Deb from customer service asking if I meant to place both orders. She was very helpful, the email was very well written and it genuinely made me feel better about the whole experience. She resolved the issue quickly and with there not being much of customer service these days I was very happy so see that is not the case everywhere!!!
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They are great !
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Excellent Customer service
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Customer service was great! There was a small problem with the part and they responded quickly and respectfully until was resolved! Highly recommended
Frequently Asked Questions
What is the Caterpillar 4N5906 valve spring used for?
The Caterpillar 4N5906 valve spring is a high-quality aftermarket engine component designed to support proper valve operation and maintain dependable valve train performance. It is manufactured to meet or exceed OEM specifications for durability and reliable engine operation.
What are the benefits of the 4N5906 valve spring?
- Helps maintain proper valve movement and tension
- Supports dependable valve train operation
- Manufactured from durable materials for long service life
- Designed to meet or exceed OEM specifications
- Suitable for demanding heavy-duty engine applications
Is the 4N5906 valve spring compatible with multiple Caterpillar engines?
Yes, this valve spring may fit various Caterpillar engine models depending on the valve train configuration and application requirements. Check your manual or reach out to Propel Parts for help verifying fitment.
Why is replacing worn valve springs important?
Replacing worn valve springs helps maintain proper valve timing and movement, reduce engine inefficiencies, and support dependable engine performance.
Does the 4N5906 valve spring meet OEM standards?
Yes, this aftermarket replacement is designed to meet or exceed OEM specifications for fit, durability, and reliable valve train performance.
Can damaged valve springs affect engine reliability?
Yes. Worn or damaged valve springs may contribute to improper valve operation, engine misfires, reduced power, and increased maintenance needs.
Are related Caterpillar engine spring components available from Propel Parts?
Yes. Propel Parts carries a variety of replacement springs and valve train components for Caterpillar engines. You can also check the Caterpillar Equipment Spring Valve 4N5905 for another related replacement option.
This 4N5906 Engine Valve Spring is compatible with the following models:
3406, 3406B, 3406C, 3408, 3408B, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3516B, 16G, 245, 24H, 5110B, 589, 621, 621B, 621F, 623E, 623F, 627B, 627E, 627F, 631D, 631E, 631G, 633E II, 637D, 637E, 637G & 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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