This slippage is caused by leakage of main control valve, boom, bucket rod and bucket oil cylinder when the bucket is loaded.
1) pre test preparation.
The a shovel is full.
B extends the piston rod of the bucket rod cylinder from the fully recovered position 50mm.
C extends the piston rod of the bucket rod cylinder from its fully extended position to 50mm..
D extends the bucket bar and the bucket turns over the person, so that the bucket connecting pin is at the same height as the pin at the lower end of the boom.
The temperature of e hydraulic oil is (50 + 5) C.
2) slip detection of hydraulic cylinder
A engine flameout.
B measured the distance between the bottom of the bucket and the ground after the engine stalled the 5min, measured the distance from the piston rod of the bucket cylinder, and measured the distance of the piston rod retracted by the cylinder of the arm and the cylinder of the bucket.
C repeats the above step 3 times and calculates the average.
