18 EXCAVATOR OPERATION OPERATION OF THE ARM OPERATION OF BUCKET Pull back the left attachment control lever and the arm will be pulled in. To move the arm out, push the control lever towards the front. To dig with the bucket, move the right attachment control lever from the neutral position towards the left. Moving the control lever towards the right pushes the bucket outwards and dumps its contents. A When pulling in the arm, the movement may stop for a short moment when the arm is in its vertical position. This is caused by the fact that at this position the maximum load for the arm and bucket is reached, and the hydraulic pressure in the cylinder is not high enough.
This is a characteristic of the hydraulic system and is not a sign of a malfunction.