Pump car parts maintenance methods

Pump truck accessories concrete piston maintenance tips:

1, after entering the winter construction, waste hydraulic oil can be added in the washing room, the ratio of oil and water can reach 1:1, but pay attention to not make the washing water temperature is too high, when the temperature exceeds 30 degrees, can not use this method.

2. During summer construction, long running water can be used to flush the washing room to reduce the temperature of the washing room; It can also be done by adding a little soap in the washing room.

Replacement standard of concrete piston for pump truck parts:

When the water in the washing room becomes cloudy, it indicates that the concrete piston needs to be replaced, if there is a small square amount must be completed, the washing room must be washed with water to ensure that there is long running water in the washing room. After the concrete seal is damaged, the dangers of not replacing it for a long time are as follows:

1, the pump is weak, easy to block the tube.

2, resulting in cylinder strain.

3. The main cylinder piston rod seal is damaged.

4, the serious is that the cement slurry into the hydraulic system pollution hydraulic system.

Pump truck parts boom structure maintenance and maintenance

The boom of pump truck accessories is the core component of pump truck, which supports the conveying pump pipe of the whole pump truck. In the ordinary working process, due to the impact force of external force or concrete on pump pipe, the boom has a great impact, resulting in its shaking. In this process, the boom is subjected to deformation forces from all sides, which may crack or fall off the welding and connecting parts of the boom. Therefore, the daily inspection of the boom is particularly important, and the after-sales service staff of Concrete distribution mall teaches you how to maintain and maintain the structural parts of the boom:

First, the connection between the pump and the chassis

1, the chassis of the front and rear axle and transfer box connection, check whether its connection flange is loose, check the transfer box fixing bolts.

2. Stability of some connecting bolts and seals.

3. Whether the big arm support seat has traces of cracking, focus on checking the slewing support and checking the integrity of the slewing gear.

4, check the wear of each connection pin, to prevent excessive gap caused by cracking at the connection.

Second, fastening of connecting parts

1. Regularly check whether the connection bolts, setting screws, nuts, pins, etc. are loose. If loose, use a torque wrench to tighten according to the torque provided in the table below.

2, especially the bolts of the slewing support bear a huge alternating load, so after every few hours of work, the original preload torque will be lost. The torque wrench must be used periodically to check the pre-tightening torque of the bolt. The boom must be placed on the bracket to check the preload torque, so that the axial force on the slewing support can be eliminated. The new boom pump truck must be inspected after 100 working hours and every 500 hours thereafter.

3, when tightening, the bolt can not have pre-tensile stress, so the boom must be folded and closed, and kept in a vertical position. When tightening the bolts on the rotating table one by one, be sure to lock the coupling nut. It should be emphasized that the high-strength bolts removed due to structural repair and the connection bolts damaged due to fatigue cannot be reused, and new connection bolts of the same grade should be used when reassembling.

 Repair of cracks of structural parts

Structural parts such as boom, leg and base frame support, due to the variable load load during operation, after a period of time, there may be cracks due to the concentration of local stress, oxidation rust and fatigue of local structural parts. After every 300 hours of operation of the boom pump truck, the user must perform weld inspection on the boom and other structural parts

The cracking of the structural parts of the boom pump truck is repairable. It should be discovered in time and dealt with as soon as possible. The bearing parts such as the boom and legs are made of high-strength steel, and can not be welded or drilled at will to change or reduce its strength. If cracks occur, they should be repaired in time.