PERIODIC MAINTENANCE PERIODIC MAINTENANCE Proper lubrication and maintenance assure trouble-free operation and long machine life. Time and money spent for scheduled periodic mainte- nance will be amply compensated by prolonged machine operation and re- duced operating cost. All hourly figures given in the following descriptions are based on service meter readings. In practice, however, it is recommended to rearrange all of them into units of days, weeks and months to make the maintenance schedule more convenient. Under rough job site or operating conditions, it is necessary to somewhat shorten the maintenance intervals stated in this manual. W-01316 - 69 -