Hamm Header Tank - OEM Number: 2400921

The HAMM Header Tank (OEM 2400921) is a direct replacement cooling system component designed to manage coolant expansion and maintain stable operating temperatures within a range of HAMM roller and compaction machinery. It acts as an essential part of the engine cooling circuit, ensuring consistent coolant levels and safe thermal performance during operation.

This header tank is typically installed within the cooling system where it serves as an expansion and reserve reservoir. As engine temperature rises, coolant expands into the tank; as it cools, it is drawn back into the system. This helps maintain correct pressure, prevents coolant loss, and supports efficient engine temperature regulation under heavy-duty working conditions.

Function and Operation

• Acts as a coolant expansion and reserve tank within the cooling system
• Maintains correct coolant levels during thermal expansion and contraction
• Helps regulate pressure within the engine cooling circuit
• Supports consistent engine operating temperature
• Reduces risk of overheating and coolant loss during operation

Technical Details

• OEM Part Number: 2400921
• Type: Header tank / coolant expansion tank
• Function: Cooling system reservoir and pressure regulation
• Application: Engine cooling system component
• Construction: Heat-resistant plastic or composite tank design

Typical Applications

Suitable for use on selected HAMM machinery, including:

• Tandem roller compaction equipment
• Single drum rollers
• Asphalt and soil compactors
• Construction and road-building machinery
• Engine-driven industrial compaction equipment

Important Information

Always confirm the correct OEM part number and machine model before ordering to ensure correct fitment and proper cooling system performance.

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery*
£11.95 or FREE for orders over £100
Orders placed before 4pm Monday to Friday will be delivered on the next business day.
Orders placed after 4pm on Friday will be delivered the following Tuesday.
*Next day delivery applies to stocked items only. Availability can be found on the product pages.

Premium Delivery*
£27.50 for delivery before 10:30am
£20.00 for delivery before 12:30pm
*Premium delivery applies to stocked items only. Availability can be found on the product pages.

For all other countries, please click here for full delivery information.

**Separate carriage charges apply to bulk products such as 205L barrels.