MAINTENANCE MAINTENANCE PROCEDURE EVERY 100 HOURS MAINTENANCE 0. Lubricating 0. Do not swing the upper structure while greasing the swing pinion. NOTICE For the first 100 hours on new machines where the parts are settling in, carry out greasing every ten hours. After digging operations under water, be sure to grease the pins which were submerged. Prepare a grease gun. 1. Using a grease pump, pump grease in through the grease fittings shown by arrows. 2. After greasing, wipe off any old grease that was pushed out. (1) Swing circle (1 point) (2) Swing pinion (1 point) When lubricating the swing pinion, turn the chassis little by little and apply grease through the grease fitting. 4-43 WARNING