J: PRECAUTIONS FOR OPERATION 1. Be careful not to compact the soil or damage earth mounds as a result of the swinging force. 2. When swinging, do not dig the bucket teeth into the soil. 3. Do not move off and excavate with the bucket leaving dug into the ground. 4. When working with the machine, do not move the cylinder to the end of its stroke but leave a small safety margin. 5. Do not use the dropping force of the bucket as a pickaxe, breaker, or pile driver. 6. Do not use the dropping force of the machine for digging. 7. It is better to excavate hard rocky ground after breaking it up by some other means. This will not only reduce damage to the machine but make for better economy. 8.
Note that the following phenomena are not faults: a) When the arm is pulled back, it will sometimes stop when becomes more or less vertical. b) The arm may sometimes stop when the bucket teeth become more or less horizontal. c) At the beginning and end of a swinging, a noise may sometimes be emitted from the brake valve. d) When descending a steep slope at low speed, a noise may sometimes be emitted from the travel motor. A If it is necessary to operate the work equipment lever when the ma- chine is traveling, stop the machine before operating the work equip- ment lever.
A For machine with autodeceleration device, if the lever is operated inside the deceleration range, the engine speed will rise suddenly. K: PRECAUTIONS WHEN TRAVELING 1. When traveling over obstacles such as boulders or tree stumps, the ma- chine (in particular, the undercarriage) is subjected to a large shock, so reduce the travel speed and travel over the obstacle at the center of the tracks. Special tracks (except PC300,3OOLC-5 MIGHTY) Wide triple shoes (700, 750, 800, 850 mm) are used as special shoes for soft ground. Therefore, do not use them when traveling over rocky ground, sandy gravel, rough ground with cobbles, and even on soft ground where there are boulders or tree roots.
* When selecting the track, see “SELECTION OF TRACK SHOES”. - 72 -