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New 4B4278 Washer Replacement suitable for Caterpillar Equipment
- New Washer Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
4.7
(Site rating)Description for 4B4278 Washer
â–¶Specification for 4B4278 Washer
â–¶Exact Fit Guarantee for 4B4278 Washer
â–¶| Dimensions | 0.79x0.79x0.04 |
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A Delay Handled the Right Way
Honestly, if I were in Miami like my shipment was, I wouldn?t have been in a hurry to ship out either. I was frustrated at first ? delays cost me time on the job ? but Propel Parts stepped up.
Deb, Daniel and the team owned the mistake, kept the communication clear, and graciously refunded my shipping costs without making it a hassle. That kind of accountability is rare these days, and I genuinely appreciated how they handled it.
Things don?t always go perfectly, but these folks proved they?re more interested in doing right by their customers than just pushing parts out the door. Solid company, solid people.
? Jimmy Spong
Hartco Mobile Welding
P.S. Incredible quality on the pin as well. I had to do some custom modifying, and let?s just say the case hardening was ? well ? hard. Great Stuff! Thank you. -
Awesome and diligent support. Would definitely recommend
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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 -
Very helpful. Every question or request I had was answered quickly. I didn't have a parts book for my excavator but that was no problem for them. If you need parts for your Cat, give them a shot.
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I almost want to cry ;( writing this review because I dont want people to find out about them and rather keep them in my pocket but they deserve it…
This company is great with Quality Products at amazing prices! Sometimes, their website is not the most accurate but is user friendly and if you got questions they will call back and are very prompt in responding via a call or text to verify inventory before placing an order.
I really appreciate and look forward to continuing to work with you all especially Anthony — he is amazing & the best!!!
Frequently Asked Questions
What is the function of the 4B4278 washer in Caterpillar equipment?
The 4B4278 washer plays a critical role in distributing load evenly across fasteners, reducing vibration, and preventing damage to connected components. It helps maintain secure assembly in heavy-duty machinery, especially in high-pressure or high-vibration environments.
Is this 4B4278 washer compatible with my Caterpillar machine?
This washer is designed to fit a range of Caterpillar equipment models, but compatibility can vary depending on your specific machine and application.
- Check your equipment manual for part number confirmation
- Compare dimensions and specifications before purchasing
If you are still unsure, reach out to Propel Parts, our team will be happy to help you verify if this part fits your equipment.
Is this washer durable enough for heavy-duty applications?
Yes, this is a premium aftermarket washer built to handle demanding conditions. It is engineered to withstand pressure, vibration, and wear, making it suitable for construction, mining, and industrial machinery. It meets or exceeds OEM specifications for performance and reliability.
When should I replace the 4B4278 washer?
You should consider replacing the washer if you notice:
- Signs of wear, corrosion, or deformation
- Loose fasteners or recurring loosening issues
- Reduced clamping force in assemblies
Regular inspection during maintenance cycles helps prevent larger mechanical failures.
Can I use this washer with other fastening components?
Yes, the 4B4278 washer is designed to work alongside bolts, nuts, and other fastening components in Caterpillar systems. For best results, always pair it with compatible hardware that meets or exceeds OEM expectations to ensure optimal performance and safety.
Where can I find similar fastening and hardware components?
For related parts, you can explore our heavy equipment fasteners category to find washers, bolts, and other essential components designed for durability and performance.
Does this washer meet industry standards?
Yes, this is a high-quality aftermarket component that meets OEM specifications. It is manufactured with precision to ensure proper fitment, load distribution, and long-lasting performance in demanding applications.
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.
1 YEAR UNLIMITED WARRANTY
ORDER BY 3PM EST. EXCL. WEEKEND
NO CORE OR EXCHANGE CHARGES
EASY RETURNS & FAST REFUNDS
