9) HYDRAULIC CYLINDER CYCLE TIME (1) Measure the cycle time of the boom, standard arm, and standard bucket cylinders. (2) ① Preparation To measure the cycle time of the boom cylinders: With the arm rolled out and the empty bucket rolled out, lower the bucket to the ground, as shown. To measure the cycle time of the arm cylinder. With the empty bucket rolled in, position the arm so that it is vertical to the ground. Lower the boom until the bucket is 0.5 m above the ground. To measure the cycle time of the bucket cylinder. The empty bucket should be positioned at midstroke between roll-in and roll-out, so that the sideplate edges are vertical to the ground.
Keep the hydraulic oil temperature at 50 ± 5 C . Boom cylinder Raise Lower ② Arm cylinder Roll in Roll out ③ 0.5m 90 ④ Bucket cylinder (3) Measurement ① Select the following switch positions. Mode selector : M mode To measure cylinder cycle times. Boom cylinders. Measure the time it takes to raise the boom, and the time it takes to lower the boom. To do so, position the boom at one stroke end then move the control lever to the other stroke end as quickly as possible. Arm cylinder. Measure the time it takes to roll in the arm, and the time it takes to roll out the arm. To do so, position the bucket at one stroke end, then move the control lever to the other stroke end as quickly as possible.
· ② - Roll in Roll out 0.5m 21077MS10 - 7-11