XCMG Coolant Expansion Tank 800154879 for QY & XCT Truck Cranes

Product Overview

This coolant expansion tank (OEM part number 800154879) is a precision-matched replacement component built for the engine cooling system of XCMG truck cranes. It acts as a dedicated coolant reservoir to compensate for fluid volume changes as engine temperature rises and falls during daily lifting operations.

Core Function in Cooling System

Working as part of the closed-loop cooling circuit, the tank collects expanded coolant when the engine warms up, and feeds coolant back into the radiator as the system cools. This process stabilizes system pressure, prevents coolant overflow loss, and removes air pockets from the cooling circuit. For cranes working long shifts in high-temperature job sites, it plays a critical role in maintaining steady engine operating temperature and avoiding overheating failures.

Material & Build Quality

The tank is molded from high-grade, heat-resistant engineering plastic selected for heavy-duty construction environments. It delivers strong resistance to coolant corrosion, thermal shock, and chassis vibration. The translucent body features clearly molded MIN/MAX level marks, allowing technicians to check coolant volume with a quick visual inspection without removing the cap. Reinforced mounting brackets and precision-molded hose ports ensure a secure, leak-free fit, and the pressure-rated sealing cap maintains correct system pressure while blocking dust and contamination.

Fit & Compatibility

Engineered to original equipment dimensions and specifications, this expansion tank matches the factory-installed unit in port layout, mounting hole positions, and internal volume. It is compatible with XCMG QY and XCT series truck cranes from 20 to 160 ton lifting capacity, enabling direct drop-in replacement with no modification required during installation.

Service & Maintenance Note

Coolant level should be inspected regularly through the tank body as part of routine crane maintenance. During scheduled service, check the tank and cap for cracks, seal wear, or leakage to preserve cooling system reliability and extend engine service life.