Operation—Operating the Machine Cold Weather Warm-Up CAUTION: Prevent possible injury from unexpected machine movement. If hydraulic oil is cold, hydraulic functions move slowly. DO NOT attempt normal machine operation until hydraulic functions move at close-to-normal cycle times. 5. Continue cycling cylinders by increasing the travel each cycle until full stroke is obtained. 6. Swing upperstructure so boom is perpendicular to tracks. In extremely cold conditions, an extended warm-up period will be necessary. CAUTION: Prevent possible injury from machine sliding backwards. Keep angle between boom and arm 90—110 ° .
Avoid sudden operation of all functions until the engine and hydraulic oil are thoroughly warm. 7. Keeping the angle between boom and arm 110 ° , fully actuate bucket close function (cylinder extend), and lower bucket to raise track off ground. 1. If temperature is below 0 ° Celsius, engine will start at 1400 rpm. Engine will maintain 1400 rpm until hydraulic temperature reaches 2 ° Celsius or 15 minutes, whichever comes first. IMPORTANT: Holding function actuated for more than 10 seconds can cause damage from hot spots in the control valve. 2. Run engine at 1/2 speed for 5 minutes. Do not run at fast or slow idle. 8.
While rotating raised track in forward direction, actuate bucket curl function (cylinder extend) for 10 seconds, and release for 5 seconds for a period of 2-1/2 minutes. CAUTION: Prevent possible injury from unexpected machine movement. Clear the area of all persons before running your machine through the warm-up procedure. If machine is inside a building, warm the travel circuit first, and move the machine to a clear area outside. Cold oil will cause machine functions to respond slowly. 9. Repeat procedure with track rotating in reverse direction. 10. Lower machine to ground. 11. Repeat steps 6—10 on opposite track. 12.
Operate all hydraulic functions to distribute warm oil in all cylinders, motors, and lines. 3. Actuate travel and swing functions slowly, initially moving only short distances. 4. Operate boom, arm, and bucket functions by moving cylinders a short distance each direction for the first time. 13. If hydraulic functions still move slowly, repeat steps 7 and 8. DW90712,000003B –19–20JAN06–1/1 2-3-4 010609 PN=74