Network optimization information:

If the oil cylinder of the hydraulic working device also has the phenomenon of "creeping", and the fault is in the main oil circuit of the hydraulic system, the diagnosis should be carried out according to the diagnostic method described in the slow lifting part of the boom oil cylinder, focusing on the airbag, finding the cause, and eliminating the symptoms.

If the boom hydraulic cylinder of the working device works normally, Hydraulic motor The "creeping" fault of should be at the end of the hydraulic motor and transmission, that is, the mechanical transmission box and the platform turntable.

(1) Check the relief valve of the hydraulic motor and try to adjust the relief valve below the hydraulic motor control valve. Unscrew the nut of the safety valve, bm2-315 Cycloid hydraulic motor Use an Allen wrench to rotate the adjusting screw plug, and the pressure change will be 2.345 MPa for each revolution. Therefore, the pressure gauge test should be 9.8 MPa

If it is lower than 9.8 MPa, it means that the "creep" fault is mostly caused by the low set pressure of the hydraulic motor.

(2) Check the hydraulic motor and mechanical transmission part. If the set pressure of the hydraulic motor safety valve is 9.8MPs, it means that "crawling" means that the mechanical friction resistance between the hydraulic motor and the rotating platform is too large.

Touch the casing of the hydraulic motor with your hand. If you feel hot, the friction of the hydraulic motor is too large, Cycloidal hydraulic motor BM2 It is proved that the fault is caused by "crawling" and should be eliminated.

If the temperature of the hydraulic motor is normal, you can manually drive the temperature of the gearbox and the rotary table, or observe the lubrication. If there are parts with high hand temperature and poor lubrication, it means that most of the "creeping" failures are caused by excessive friction resistance and should be eliminated.