How to dismantl of small concrete pump boom system

After any mechanical device used for some time, there will be some natural wear and tear, or inexplicable failures. This time if the following situations, you may need dismantling of small concrete pump truck boom system.
1, small truck boom maintenance is not good, the pin and the copper liner wear serious, we need to replace the pin or jib boring;
2, connecting rod or pin transformation;
3, the replacement of a new boom.
The first step: a small concrete pump can not work unless it is, on the contrary are otherwise removed from the beginning of the last boom, when installed in order. The final forearm flat on the ground, and with good wood pad, penultimate section arm and arm into the required angle of 5-10 degrees, in order to avoid arm cylinder in extended or retracted extreme position.
1.a small pump this last boom cylinder on the compression balancing valve is opened to relieve pressure. Because it is high-pressure oil, so the relief time to pay attention:
Loosen the balancing valve pressure regulator, the attention to the original position be marked, or write down Loosen laps. If you need to remove the balancing valve shall be installed with a cloth face balancing valve and the cylinder block, to prevent high pressure oil discharged wounding.Use a hammer to the boom cylinder and linkage pin knocked out, hanging under the fuel tank. If the pressure relief valve has been removed, be careful not to spill.
2.the arm and the link pin to knock them out, slightly lift the penultimate section of the boom, the last section of the boom for demolition is completed.
3.Remove the copper sleeve, copper sleeve and the pin to be checked, if you need to replace worn.
4.Install boom and cylinders, pay attention to the pin direction.
5.If you previously removed a balancing valve, now need to install and adjust the dynamic balance valve pressure balance valve on the fuel tank, the pressure to return to the previous setting.
6.Start and begin operating the boom, boom see whether the firm or have no oil spill situation. Note: When operating the boom, the smallest possible margin, no person shall close the boom range of motion.
After these few steps, you can successfully dismantling of small concrete pump truck boom system.