Self-Loading Concrete Mixer Operating Notes: 7 Key Tips
A self-loading concrete mixer combines material loading, mixing, transport, and concrete discharge in one machine, making correct operation especially important for productivity and service life. KLIONCE self-loading mixer solutions are designed for construction sites that need flexible on-site concrete production and transport.
For example, the KS4600T self-loading concrete mixer features a 4.5 m³ mixing drum, 0.45 m³ loading bucket, 85–90 kW power, a 4105 Turbo engine, and a Bonfiglioli reducer. Its mixing drum rotational speed reaches at least 21 rpm, providing a practical configuration for on-site concrete mixing and material handling.
1. Change Between Feeding and Discharging at Engine Idle Speed
When switching the mixing system between feeding and discharging modes, operate the changeover while the engine is at idle speed. The control should return completely to the neutral position and remain there briefly before moving to the next operating position.
Avoid changing directly from feeding to discharging under high engine speed. Smooth engagement helps reduce unnecessary shock loads on the reducer, transmission components, and mixing system.
2. Check the Control Position Before Discharging
Before beginning concrete discharge, keep the engine at idle and confirm that the feeding and discharging control is correctly positioned for discharge. Once the control is fully engaged, engine speed can be increased appropriately to raise the mixing drum speed and improve discharge efficiency.
When the machine is travelling, avoid unnecessary manual throttle operation for concrete discharge. Discharging operations should be performed according to the machine operating procedure and job-site conditions.
3. Control Concrete Mixing and Transport Time
Concrete should not remain in the drum longer than necessary. For concrete without retarders, initial setting can begin relatively quickly, especially under warm working conditions. Operators should therefore coordinate loading, mixing, transportation, and discharge carefully.
As a practical working reference, concrete transport is commonly planned within approximately one hour, while unnecessary delays approaching 90 minutes should be avoided. Actual allowable time should always follow the concrete mix specification, additives used, ambient temperature, and project requirements.
Good construction site equipment planning also helps reduce waiting time by coordinating concrete production, transportation, labor, and pouring operations before the mixer arrives at the work area.
4. Keep the Mixing Drum in the Correct State During Travel
When the self-loading mixer is travelling with concrete inside the drum, make sure the feeding and discharging control remains in the appropriate mixing or feeding state specified for transport.
Maintaining the correct drum rotation helps keep the concrete mixed consistently during transportation and reduces the risk of segregation or premature material buildup inside the drum.
5. Clean the Mixing Drum Immediately After Work
After concrete work is completed, clean the inside of the mixing drum, feeding hopper, discharge chute, and related areas as soon as possible.
Concrete left inside the drum can harden and gradually reduce effective drum capacity. Hardened material can also interfere with smooth feeding and discharging and increase the load on the mixing system.
Regular cleaning is much easier and less expensive than removing fully hardened concrete later. Operators should make drum cleaning part of the standard end-of-shift procedure.
6. Drain the Water System During Freezing Weather
When the machine is parked in winter or in temperatures below freezing, remove remaining water from the water tank, pipelines, valves, and water gun according to the maintenance procedure.
Water left inside the system can freeze and expand, potentially damaging pipes, fittings, pumps, valves, and other water-supply components. Winter preparation is especially important when the mixer will remain unused overnight or for an extended period.
7. Prepare the Mixer Correctly for Long-Term Storage
If a self-loading concrete mixer will not be used for a long period, store it whenever possible in a dry, ventilated, and moisture-protected location. Follow the manufacturer's storage procedure for coolant, fuel, electrical isolation, battery maintenance, and hydraulic components.
If short-term outdoor storage is unavoidable, cover the machine properly and give special protection to the mixing drum, feeding hopper, discharge chute, cab, and electrical components.
Avoid allowing rainwater to accumulate inside the mixing drum. Standing water increases unnecessary load during storage and can contribute to corrosion.
Inspect High-Wear Steel Components Regularly
The mixing drum, feeding hopper, discharge chute, and other concrete-contact components are continuously exposed to sand, aggregate, cement, and water. These abrasive materials gradually wear protective coatings and steel surfaces.
Inspect these areas regularly for worn paint, exposed steel, rust, deformation, or damage. Clean corrosion early and restore protective coatings when necessary to help extend component service life.
Daily Care Helps Protect Your Self-Loading Mixer Investment
Correct operation does not require complicated procedures. Smooth feeding and discharge changes, proper concrete timing, immediate cleaning, winter drainage, and suitable storage can prevent many avoidable problems.
The KS4600T combines a 4.5 m³ mixing drum with a 0.45 m³ loading bucket and an 85–90 kW power configuration, allowing loading, mixing, transportation, and discharge to be completed with one machine. Following correct operating and maintenance procedures helps keep these systems working reliably throughout demanding construction projects.
Contact KLIONCE for more information about self-loading concrete mixers, machine selection, operating guidance, spare parts, and equipment solutions for your construction projects.
