MACHINE OPERATIONS AND CONTROLS 3.3.2 AFTER STARTING ENGINE Emergency stop If there has been any abnormal actuation or trouble, turn the starting switch key to the OFF position. If the work equipment is operated without warming the machine up sufficiently, the response of the work equipment to the movement of the control lever will be slow, and the work equipment may not move as the operator desires, so always carry out the warming-up operation. Particularly in cold areas, be sure to carry out the warming-up operation fully. 3.3.2.1 BREAKING-IN THE NEW MACHINE Your Komatsu machine has been thoroughly adjusted and tested before shipment.
However, operating the machine under severe conditions at the beginning can adversely affect the performance and shorten the machine life. Be sure to break-in the machine for the initial 100 hours (as indicated by the service meter). During break-in operations, follow the precautions described in this manual. Idle the engine for 5 minutes after starting it up. Avoid operation with heavy loads or at high speeds. Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden stops, and sudden changes in direction. 3.3.2.2 WARMING-UP OPERATION IMPORTANT When the hydraulic oil is at a low temperature, do not carry out operations or move the lever suddenly.
Always carry out the warming-up operation. This will help to extend the machine life. Do not suddenly accelerate the engine before the war- ming-up operation is completed. Do not run the engine at low idling or high idling conti- nuously for more than 20 minutes. After starting the engine, do not immediately start operations. First, carry out the following operations and checks. 1. Pull fuel control lever (1) from low idling (position A) to midway position (B) between full speed and low idling to raise the engine speed to a mid-range speed, then run un- der no load for approx. 5 minutes.
NOTE When the ambient temperature is below 0°C (32°F), keep the fuel control lever close to the 1/4 position when carrying out the warming-up operation. 106 WARNING CAUTION