Working method for maintenance of excavator boom without action:
(1) the main valve of the excavator is blocked, or the main valve is not fully opened
(2) the internal leakage of the oil cylinder causes the arm failure of the excavator
3The boom hold valve has failed
(4) the oil pressure of the main pump of the excavator is insufficient
5) or there is a problem with the oil guide line of the excavator
The above problems are the common causes of slow motion of the excavator boom. The specific cause needs to be checked by the machine owner.
In addition, if the excavator arm does not move, it may point to the failure that the excavator arm cannot be lifted. When the excavator arm cannot be lifted, we must first check the excavator pilot valve handle for oil leakage? Measure the pilot oil pressure. If the oil pressure is not the specified value, the excavator arm will not move (the arm cannot be lifted) because the excavator pilot oil pressure value is wrong. The specific reason for the incorrect pilot oil pressure value may be the damage of the plunger seal.
Failure analysis of excavator boom not moving (boom cannot be lifted) another possible cause is that the main pump oil pressure technology of the excavator is insufficient, the pilot control oil pressure system is insufficient, the boom main control valve 1 is faulty, the boom holding valve 2 or the boom cylinder 6 is faulty.
