3CX, 4CX
Telescopic Handlers, Wheeled Loaders, Dumpers, MIDI CX
The fuel filler cap is a key component for sealing the tank. Its job is to prevent fuel leakage and to protect the inside of the tank from dirt, dust, and water. If your cap is cracked, its gasket is hardened or perished, it's "sweating" fuel, or has been lost, it is time for a replacement. A leaking cap leads to fuel contamination, which can damage filters and the injection system, and also poses a fire hazard and risk of spillage.
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Durable Polymer
Resistant to weather conditions
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Perfect Seal
Protection against leaks and dirt
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Perfect Fit
Secure and easy closing
The accuracy and quality of materials guarantee long and trouble-free use without the need for frequent replacement.
The cap is fully adapted to work with the original fuel filler neck on metal tanks, ensuring a consistent and tight seal.
The GX-AFTER brand is a proven and safe alternative that offers quality comparable to original parts at a much better price.
Before fitting the new cap, carefully clean the mating surface on the filler neck of any fuel residue, dust, and dirt.
While replacing the cap, check the condition of the mesh strainer inside the filler neck. If it is damaged or clogged, replace it.
Every time you refuel, check the condition of the cap's gasket. If it is hardened or cracked, replace the cap to prevent leaks.
Answer: Yes, it's very likely. A worn or hardened gasket in the cap is the most common cause of leaks and the smell of fuel.
Question: Why can't I use my old cap if it's not cracked?Answer: Over time and with exposure to fuel, the rubber gasket hardens, shrinks, and loses its properties, leading to leaks. Even if the plastic part of the cap looks fine, the seal is already worn out.
Question: Will this cap fit newer machines with a plastic tank?Answer: No, this cap is exclusively for JCB machines produced from 1998 onwards that have a metal fuel tank. Machines with a plastic tank require a different type of cap.
If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.
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Fuel filler cap suitable for JCB 3CX 4CX backhoe loaders and telehandlers - 1998--> / with a metal fuel tank.

















