Genuine coolant expansion (header) tank for JCB machines with JCB DieselMax engines (2005→). Version with a sensor port for level/temperature monitoring; engineered for 3CX/4CX cooling layouts and selected Vibromax rollers.
Genuine JCB component — fully matched to the OEM cooling system.
| Brand (Machine type) | Model |
|---|---|
| JCB (Backhoe loaders) | 3CX, 4CX — approx. from serial no. 967724 (DieselMax 2005→) |
| JCB (Rollers) | Vibromax VM115, VM132, VM146, VM166, VM200 — selected serial ranges |
Indicative list — confirm 128/15479 and the sensor/no-sensor variant against your machine.
1. Drain & depressurise
Drain coolant safely and release pressure before removal.
2. Inspect hoses & clamps
Replace cracked hoses and fatigued clamps during service.
3. Stress-free fitment
Mount without stressing the tank; align hoses per flow direction.
4. Sensor & wiring
If fitted, connect the sensor and check the connector for corrosion.
5. Refill, bleed, verify
Refill with the recommended coolant, bleed air, warm up and leak-check.
Never open the cap on a hot engine — scalding risk under pressure. Use coolant meeting JCB specifications only.
The tank compensates coolant expansion and aids air removal. Failure can cause leaks, overheating and warning messages.
Avoid overheating — choose the proven OEM cooling component.
128/15479 is available. We’ll match the correct sensor/no-sensor variant and dispatch fast.
📞 Not seeing your exact version?
We list only a slice of our range — 60,000+ parts in stock. Call us and we’ll confirm fitment and ship promptly.
1. Difference between 128/15479 and 128/15480?
128/15479 includes a sensor port; 128/15480 typically comes without it. Choose based on your machine’s wiring.
2. Does it fit Vibromax rollers?
Yes — e.g., VM115, VM132, VM146, VM166, VM200 within specified serial ranges.
3. From which 3CX/4CX serial number is this tank used?
Approx. 967724 (DieselMax 2005→). Always confirm your VIN/serial before ordering.
4. Is the cap included?
Depends on the pack. If you need a new cap, order it as a related item.
Need help confirming compatibility? Call us — we’ll match the correct tank and ship quickly.
Data sheet
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Suitable for JCB 3CX 4CX backhoe loaders with JCB DieselMax engine after 2005.

















