混凝土泵车故障的应急处理（第12部分）

Concrete pump truck malfunction:

Double gear  泵车, low pressure in the reversing system, no force in the swing of the S pipe.

现象及原因：

The directional pressure is too low, and at this time, the directional pressure will swing below 14Mpa, causing the S pipe to swing weakly and making concrete pumping difficult.

1. Main overflow leakage or damage;

2. Internal leakage or damage of gear pump.

3. The pressure of the accumulator airbag is insufficient or leaking.

Emergency elimination methods:

1. Swap the mixing overflow valve with the reversing overflow valve;

2. Swap the two outlet pressure oil pipes of the dual gear pump;

3. Place a nitrogen cylinder on the vehicle, inflate it, and replace the airbag after pumping the concrete.

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