New 4N3955 Gasket Replacement suitable for Caterpillar Equipment
- New 4N3955 Gasket Replacement suitable for Caterpillar Equipment
- Made to USA Specifications
Buy with Confidence: All parts are covered by our warranty
Exact Fit Guarantee
This part is guaranteed to fit your machine.
Wrong Part?
We'll overnight correct part at no cost to you.
Description for 4N3955 Collar Ring
â–¶Specification for 4N3955 Collar Ring
â–¶Exact Fit Guarantee for 4N3955 Collar Ring
â–¶| Dimensions | 6.00x8.00x0.08 |
|---|
-
Always helpful and great pricing
-
Fast communication, and very Helpful!
-
Great service affordable parts
-
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. -
Will definitely use regularly!
Shipped the exact product we were looking for. Prompt Customer Service. Seamless cross-border shipping
Frequently Asked Questions
What is the 4N3955 gasket used for?
The 4N3955 gasket seals the joint between two mating surfaces, holding pressure and preventing fluid or gas leaks. A flat, intact gasket is essential to a leak-free assembly.
How do I install the 4N3955 gasket?
To install the 4N3955 properly, prepare the area first and confirm the result afterward. Use these steps:
- Shut down, cool, and depressurize the assembly before opening it
- Remove the old gasket and scrape the surfaces fully clean
- Inspect both faces for warping, pitting, or scoring
- Position the new 4N3955 so all ports and bolt holes line up
- Torque the fasteners in the correct sequence and re-check for leaks
Which Caterpillar machines is the 4N3955 compatible with?
The 4N3955 gasket is used across many Caterpillar applications, but the correct fit depends on your exact model and assembly. Always cross-check fitment using your service manual or part reference guide before ordering. 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.
Does the 4N3955 gasket meet performance standards?
Yes. The 4N3955 is built to meet OEM specifications for fit, strength, and service life. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications to keep the assembly protected.
How often should the 4N3955 be replaced?
Service life for the 4N3955 depends on operating conditions and load. Replace it on inspection findings or at the interval your manual specifies rather than waiting for a failure. When servicing this area, the 9Y9895 Crankshaft Seal Front is commonly replaced at the same time.
What are the signs of a worn or failing 4N3955 gasket?
A worn 4N3955 usually gives early warning through the assembly it supports. Watch for these signs:
- External leaks at the mating joint
- Loss of pressure or compression
- Coolant, oil, or gas cross-contamination
- A crushed, blown, or hardened gasket on inspection
Why is the 4N3955 gasket important, and what related part is commonly replaced with it?
A sound 4N3955 is inexpensive insurance against larger repairs. Servicing it on time with parts that meet OEM specifications keeps the whole assembly working as intended. During an overhaul, the 0951514 Seal O-Ring is frequently replaced alongside this part.

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.
Exact Fit Guarantee®
The right part — or we'll make it right.
Order Normally
Know your part number? Simply place your order.
Not Sure?
Place your order, then send us your serial number before it ships.
We'll verify fit.We Make It Right
Wrong part? We'll make it right.Fast. At our expense.
Worldwide Shipping












































