Summary of maintenance faults of pump truck

Learn some maintenance knowledge every day

2022-03-22

A summary of pump truck maintenance problems. If you accidentally encounter them all, you can solve them every minute

During the maintenance of the pump truck, we will encounter many and various problems. Don't worry. We will resolve them as soon as possible.
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Common faults and treatment methods of pump truck -- pipe blockage
Take a sy5360 45m pump truck as an example
The speed-up of forward and reverse pumps, water pumping and mortar pumping are normal, but the pipe blockage occurs when pumping concrete. It is observed that the concrete is always blocked at the third boom pipe when pumping, so it is suspected that there is foreign matter blocking in the pump pipe.
(1) Disassemble the third pump pipe and check that there is no foreign matter in the pipe. Reinstall it, and the commissioning fault is still the same.
(2) Turn on the pump, observe that the pressure of the main system is about 10MPa, and the pressure is normal. At the same time, detect the pressure holding pressure of the system, and the maximum value can reach 34mpa. Therefore, the vehicle is a new vehicle only used for 3 months, so the fault of the hydraulic system of the main pump can be eliminated.
(3) Shut down and depressurize, disassemble the reducer, check whether there is any foreign matter in the S pipe, and check whether the piston head is normal and free of wear.
(4) Disassemble the elbow at the third section of boom, set the pump right, and the concrete can be pumped. It is suspected that there are foreign matters in the rear pump pipe, and there are no foreign matters after disassembly and inspection.
(5) Analyze the pumping system and the pressure is normal. The piston in the conveying cylinder is normal and there is no foreign matter in the S pipe. It is judged that the fault should be in the pump pipe. After dismantling and inspecting all pump pipes, a mixing blade of the mixer truck was found horizontally stuck in the first horizontal pipe at the walking platform. After being cut off and taken out with acetylene flame, the pump pipe was reinstalled, and the pumping of the test machine was normal. According to the analysis of pump truck accessories, the cause of the failure is that the blades in the mixer truck fall off.
sany

Common faults and treatment methods of pump truck -- pipe blockage
Take a sy5360 45m pump truck as an example
The speed-up of forward and reverse pumps, water pumping and mortar pumping are normal, but the pipe blockage occurs when pumping concrete. It is observed that the concrete is always blocked at the third boom pipe when pumping, so it is suspected that there is foreign matter blocking in the pump pipe.
(1) Disassemble the third pump pipe and check that there is no foreign matter in the pipe. Reinstall it, and the commissioning fault is still the same.
(2) Turn on the pump, observe that the pressure of the main system is about 10MPa, and the pressure is normal. At the same time, detect the pressure holding pressure of the system, and the maximum value can reach 34mpa. Therefore, the vehicle is a new vehicle only used for 3 months, so the fault of the hydraulic system of the main pump can be eliminated.
(3) Shut down and depressurize, disassemble the reducer, check whether there is any foreign matter in the S pipe, and check whether the piston head is normal and free of wear.
(4) Disassemble the elbow at the third section of boom, set the pump right, and the concrete can be pumped. It is suspected that there are foreign matters in the rear pump pipe, and there are no foreign matters after disassembly and inspection.
(5) Analyze the pumping system and the pressure is normal. The piston in the conveying cylinder is normal and there is no foreign matter in the S pipe. It is judged that the fault should be in the pump pipe. After dismantling and inspecting all pump pipes, a mixing blade of the mixer truck was found horizontally stuck in the first horizontal pipe at the walking platform. After being cut off and taken out with acetylene flame, the pump pipe was reinstalled, and the pumping of the test machine was normal.
According to the analysis of pump truck accessories, the cause of the failure is that the blades in the mixer truck fall off.