16 EXCAVATOR OPERATION C Switching from [Pattern B] to [Pattern A] 1. Stop the engine and place the front attachment on the ground. Release pressure out of the cylinders. 2. Turn the knob on the control box to open the cover. 4. Shift the joints (C) and (D) to the left, and apply and tighten up the bolts (1) and (2). (1) Bolt1 (2) Bolt2 (3) Joint (C) (4) Joint (D) (1) Knob 3. Remove the bolts (1) and (2). To avoid personal injury: A The bolts (1) and (2) are of special type. Do not use general bolts, because otherwise the machine may malfunction and get damaged. (1) Bolt1 (2) Bolt2 (3) Joint (C) (4) Joint (D)