Product: Fuel filler cap for metal fuel tank
Part Number: 123/05892
Manufacturer: OEM
Diameter: approx. 80 mm
Product Description
The 123/05892 fuel filler cap is designed for JCB 3CX and 4CX backhoe loaders equipped with a metal fuel tank. Its primary function is to ensure a tight seal of the fuel system and to protect the tank interior from dirt, dust, and water ingress.
A damaged or worn cap (cracked housing, hardened seal, fuel leaks, or missing cap) can lead to fuel contamination, resulting in clogged fuel filters, damage to the fuel pump, and injector system failures. A leaking cap also increases the risk of fuel spills and fire hazards.
When should the cap be replaced?
Application (Machines from 1998 with a metal fuel tank):
JCB Backhoe Loaders
3CX, 4CX
Other JCB Machines
Telescopic Handlers, Wheeled Loaders, Dumpers, MIDI CX
Reliability Features
💪 Durable construction
Resistant to weather conditions, fuel exposure, and UV radiation
🛡️ Perfect sealing
Protects against fuel leaks, moisture, and contamination
🎯 Precise fit
Secure, easy, and reliable closing without play
⚠️ Safety Warning
Fuel leaks near hot engine or exhaust components pose a serious fire hazard. Any signs of leakage require immediate replacement of the fuel filler cap.
Data sheet
Specific References






The 123/05892 fuel filler cap is designed for JCB 3CX and 4CX backhoe loaders equipped with a metal fuel tank. Its primary function is to ensure a tight seal of the fuel system and to protect the tank interior from dirt, dust, and water ingress.

















