24. SERVICE PROCEDURE 24.8.4 CHECK MAIN FRAME, WORK EQUIPMENT (BLADE, RIPPER) Check after the first 4000 hours, and every 1000 hours after that. Main frame 1. Preparation Wipe off all the mud that is stuck around portions A L of the work equipment and frame to make it easier to carry out the check. 2. Visual check Carefully check the base material of the steel casting and weld- ing at portions A L , and check that there is no damage. If any cracks or other damage are found, carry out repairs. Please contact your Komatsu distributor for details of the repair procedure. Blade Ripper 3-67