warrant more frequent attention. All parts should be completely cleaned and kept covered till assembly, and worn part replaced with spares kept in stock for such emergencies, All parts should be kept clean, connections made secure, and the lubricant checked after assembly before the machine is again put in operation. If all these precautions are taken and your machine gets the attention it requires for smooth uninterrupted service, the time and effort spent will be well worth the reward in top performance, OPERATION BEFORE STARTING 1. Machines that have been subjected to dampness in shipment or storage should be thoroughly dried out before being placed in service. Instructions for drying out and for insulation resist- ance tests are given further on under "Maintenance, Check the voltage stamped on the nameplate to see that it agrees with that of the power supply or supply system. See that all connections to tke machine and the control appara- tus correspond with the wiring diagrams. Make sure that the bearings are properly lubricated. Grease lubricated, ball bearing, machines are shipped with the proper amount of high grade grease in the bearings. Refer to *Main- tenance” for further information on lubrication of bearings. Inspect the air gap to be sure that no foreign material is present. 3-28