Mixing Drum System: Features a conical design with reverse-rotation discharge; the drum has a capacity of 3 cubic meters and contains spirally arranged mixing blades, typically rotating at 2–10 rpm. Regular inspection of blade wear is required to prevent reduced mixing efficiency caused by concrete buildup.
Hydraulic Transmission System: Equipped with a gear pump and hydraulic motor; drum rotation (forward and reverse) is controlled via an operating handle. Monthly checks of the hydraulic fluid level are recommended; low-temperature hydraulic fluid (rated for -35°C) should be used in winter to prevent line freezing.
Loading and Unloading Devices: Includes components such as the feed hopper and discharge chute, which assist the mixing drum in the loading and unloading processes.
Hydraulic Transmission System: Comprising the power take-off (PTO), hydraulic pump, hydraulic motor, and reduction gearbox, this system provides the core power to drive the mixing drum's rotation and is the area most prone to malfunctions in small mixer trucks.
Water Supply System: Used to clean the mixing drum and loading/unloading ports to prevent concrete hardening; it also serves to cool the hydraulic system. Common configurations include centrifugal water pumps and pressurized water tanks.
