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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Fast response. Great price. Good communication not much time waiting for a answer
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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
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Amazing Help.
I don't know who I spoke with, but they were helpful. We will be buying those parts shortly. -
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. -
I’ve been ordering parts from propel for about 3 years & counting. I live in Hawaii where we have a hard time getting parts especially for decent prices with fast shipping. I've been 100% satisfied with the company and the customer service and will continue to use them. I recommend propel to everyone here in Hawaii and we are all happy to have you guys. Thank you!!!
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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