When the engine reaches the highest speed,
the mixer drum rotating speed should be lower than 15rpm. Otherwise, the drum
body and the mixing blades will be premature worn down. During working, the
rotating speed of the drum should be adjusted by the operation system. During
unloading, the rotating speed of the drum also should be adjusted higher than
10rpm to ensure the quality of the mixing material. There is a round nut on the
drum roller which is used for setting and adjusting the slack of the bearings.
Mixing blades are easier worn down so that
they should be checked every year and preventive repaired every two years.
No leaking allowed between the mixing
material feeding port and the drum. The slack between the feeding port and the mixer truck drum roller should be less
than 5mm. If leaking occurs, repair it depending on the different mixer truck
models. For example, for some models, just replace the wide rubber strap. And
for some models, repair it by welding the thin steel plate with the size larger
than a half circle.
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