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4W5481 Pump G for CAT 3406, SR4, 621B & more

$427.87
In Stock • Ships Today • Order By 3pm ET
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Details

Description for 4W5481 Fuel Pump

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This aftermarket Caterpillar 4W5481 Fuel Pump 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 Fuel Pump.
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 4W5481 Fuel Pump

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Replacement Part Number(s): 4W-5481, 0R3379
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: 6.15 LBS | 2.79 KG
Dimensions: 6.30 x 6.30 x 6.30 (inches)
Condition: New

Exact Fit Guarantee for 4W5481 Fuel Pump

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Looking for a reliable replacement Caterpillar 4W5481 Fuel Pump ? 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.
Reviews

Customer Reviews

Bruce (Colorado, USA)
★★★★★

Great customer service answered email question quickly.

Chris Wessels (Illinois, USA)
★★★★★

Great customer service.
Prompt , knowledgeable and friendly service.

Ruslan Zadyrka (Colorado, USA)
★★★★★

They are great !

Hilly Chu (California, USA)
★★★★★

helpful and professional.
quick and professional service.

Gen
★★★★★

Amazing Help.
I don't know who I spoke with, but they were helpful. We will be buying those parts shortly.

Jacob Denny (Kentucky, USA)
★★★★★

My part was damaged in shipping and everyone was very helpful on get it resolved and sent me another free of charge.

Leon Bachu (Uganda)
★★★★★

Propel parts is a very reliable parts source for heavy equipment
Quick response,good quality parts,favourable prices and always deliver on time

Ryan Sanders (Oklahoma, USA)
★★★★★

Having issue running my credit card, Steven was more than helpful to send me a payment link to complete my transaction!

Taylor Luke (Minnesota, USA)
★★★★★

Quick Response. Very much appreciated.

FMHERS, Inc. (Texas, USA)
★★★★★

Excellant customer service!
The prices are very good! The customer service is excellant! I had to contact them because our tax info wasn't right and they refunded it on the spot! Great job! we will be doing a lot more ordering from thi company. Highly recommended!

Product Questions

Frequently Asked Questions

What is the function of this 4W5481 Pump G?

The 4W5481 Pump G helps supply consistent fuel flow to the engine, ensuring smooth performance and efficient operation of your equipment under various load conditions.

How to install this 4W5481 Pump G?

Please refer to the following instructions to install
1. Before installation, make sure the engine is cool and the fuel lines are depressurized.
2. Remove the old pump carefully, clean the mounting area, and position the new unit in place.
3. Secure it with proper fittings and check for any leaks once installed. 
It’s always best to follow your equipment’s service manual or seek professional assistance.

Which equipment models are compatible with this part?

This fuel pump fits models such as 3306, 3406, SR4, 621B, 623B, 627B, and several others. Compatibility may vary, so it’s advised to verify your model number before ordering.

Does this part meet quality and performance standards?

Yes, this 4W5481 fuel pump is designed to OEM specifications, ensuring reliable fuel delivery and long-lasting performance in demanding work environments.

How can I confirm if this fuel pump fits my machine?

You can check your equipment’s part number in the service manual or compare it with your existing pump. If you’re unsure, our support team can help verify compatibility before purchase. 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.

What are the signs that indicate this part needs replacement?

Common symptoms include irregular fuel flow, engine stalling, poor fuel efficiency, or difficulty starting. Replacing the pump promptly can prevent engine damage or performance loss.

Is this product compatible with all metals?

Yes, it’s formulated to work effectively on a wide range of metals, including steel, stainless steel, and aluminum. Always check the service manual or consult a technician for specific material compatibility. 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.

How should I maintain this fuel pump for long-term use?

To maintain this properly, you should:
1. Keep your fuel system clean by using quality filters and draining water or debris regularly. 
2. Periodic inspections and timely maintenance help extend the pump’s service life.

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

This 4W5481 Fuel Pump is compatible with the following models:
3306, 3406, SR4, 621B, 623B, 627B & more...

Shipping | Returns

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.

Exact Fit Guarantee

Exact Fit Guarantee®

The right part — or we'll make it right.

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Helping equipment owners find the right parts since 2012.