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New 4J0519 Seal O Ring Replacement suitable for Caterpillar Equipment
- New Seal O Ring Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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This part is guaranteed to fit your machine.
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Description for 4J0519 Seal O Ring
▶Specification for 4J0519 Seal O Ring
▶Exact Fit Guarantee for 4J0519 Seal O Ring
▶| Dimensions | 1.93x1.93x0.16 |
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Quick and prompt support. Easy to work with. They had the parts in stock which is even better. Great pricing.
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prompt clear replies
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Fabulous customer service!
We accidentally ordered twice the same item and Misty caught it and contacted us immediately to clarify. Fabulous service!!! Highly recommend! -
100% recommend it is a good parts by par for five years and everything is good
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Quick Response. Very much appreciated.
Frequently Asked Questions
What is the Caterpillar O-Ring 4J0519?
The 4J0519 is a precision O-ring seal used in Caterpillar hydraulic, fuel, and cooling systems to prevent fluid leakage at connection points, fittings, and component interfaces across a wide range of equipment.
What equipment is the 4J0519 O-ring compatible with?
This is a widely used O-ring across many Caterpillar machine families and engine platforms. Always cross-reference with your parts manual to confirm the correct application. Please reach out to Propel Parts for help verifying fitment if needed.
What are signs the 4J0519 O-ring has failed?
Look for:
- Fluid seeping or dripping at the sealed joint
- Visible deterioration — cracking, hardening, or compression set
- Recurring leaks after tightening hardware
- Discoloration or swelling from chemical incompatibility
These signs indicate immediate replacement is needed to prevent system damage.
What material is the 4J0519 O-ring made from?
The 4J0519 is manufactured from nitrile rubber (NBR) or a compatible high-performance elastomer that meets or exceeds OEM specifications for petroleum fluid compatibility, temperature resistance, and compression characteristics.
How should I install the 4J0519 correctly?
Always clean the groove and mating surfaces before installation. Lightly lubricate the O-ring with clean system fluid. Install without twisting and confirm it is fully seated before assembly. Torque mating fasteners to spec to avoid over-compression.
Is this a premium aftermarket O-ring?
Yes. The 4J0519 from Propel Parts is a high-quality aftermarket O-ring designed to meet or exceed OEM performance expectations. It is manufactured to exact dimensional and hardness specifications for reliable sealing in Caterpillar equipment.
Browse our complete selection of seals and gaskets for Caterpillar hydraulic and fuel systems.
Can I purchase this O-ring as part of a seal kit?
In many cases, yes. Seal kits are available that include multiple O-rings and seals for a complete system service. This is often more economical and ensures all seals are replaced at the same time.
Check our seal kits to find bundled options that include the 4J0519 and related seals.
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®
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.
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Wrong part? We'll make it right.Fast. At our expense.
1 YEAR UNLIMITED WARRANTY
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