Coolant Expansion Tank Cap Sealing Reservoir Pressure SHACMAN F3000 X3000 Truck Unit

Coolant Expansion Tank Cap for SHACMAN F3000 and X3000

Coolant expands when hot and contracts when cold. If the cap cannot hold the set pressure, the system draws air and the reservoir level drifts, which is why a driver tops up coolant one week and sees a low level the next without any visible leak. This cap seats evenly on the tank neck and opens at the specified pressure.

Part Specifications

How Air Gets In

• A flattened seal lets the system pull air on cool down.
• Air pockets raise running temperature on the next climb.
• Repeated top ups mask the real cause for weeks.
• A correct cap restores the closed loop.
• Water pump and thermostat then work as designed.

Application

Replaced during cooling service on SHACMAN F3000 and X3000 trucks whenever coolant loss has no visible source.

Send your model and quantity and we will quote the caps with delivery to your port.