Air System and Components------------------Page

PREVENTIVE MAINTENANCE DO

1. Carefully read this Manual and Parts Books. 2. Lubricate regularly. Establish a systematic procedure and stick to it. 3. When lubricating, check all bolts, nuts, lock nuts and cotter pins. 4. Keep loose objects in tool box or in suitable enclosure or cabinet.

5. Always replace guards. 6. Always watch your clearance when swinging.

DONIT

1. Service or lubricate parts that are moving. 2. Leave the load suspended in air. DONIT APPLY SWING BRAKES WHILE MACHINE IS ROTATING, EXCEPT IN EMERGENCY.

Open pit mlnlng machinery is required to operate in the most adverse conditions of any industrial machines.

Conditions are rarely ideal. It is always too hot, too cold, too dry or too wet. The air is always saturated with fine abrasive dust. High production schedules tax both men and machines. Down time and delays are intolerable. Down time can not be eliminated, but it can be kept to a minimum by a progressive and conscientious program of preventive maintenance. Aside from regular lubrication, proper and accurate adjustments, the personnel should be aware of any deviation from the normal, which could be evidence of impending break down or components failure.