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r�l r�l r-7 C-1 r-1. t�i rn rn r-i r-t(7-1 • Block the wheels or lower the leveling jacks or both ana set • Follow the manuiactu�e� ts recur i,iienuations t.,, �pplY;, hand brakes before working under a drill rig. the proper quantity and quality of lubricants,hydraulic oils and/or • Release all pressure on the hydraulic systems,the drilling coolants. fluid system and the air pressure systems of the drill rig—when Replace all caps,filler plugs,protective guards or panels,and passible and appropriate— prior to performing maintenance. In high pressure hose clamps and chains orcables that have been other words,reduce the drill rig and operating systems to a"zero removed for maintenance before returning the drill rig to service. energy state before performing maintenance.Use extreme cau- tion when opening drain plugs and radiator caps and other pressurized plugs and caps. • Do not touch an engine or the exhausts ystem of an engine 7. Hand Tools following its operation until the engine and exhaust system have Since there are almost an infinite number of hand tools that had adequate time to cool. can be used on or around a drill rig and in repair shops,there are an equal number of instructions for proper use."Use the tool for its intended purpose" is the most important rule.The following suggestions apply to safe use of several hand tools that fre- quently are used on and around drill rigs: • When a tool becomes damaged,either repair it before using it again or get rid of it. • When using a hammer,any kind of hammer for any purpose, wear safety glasses and require all others around you to wear safety glasses. • When using any kind of chisel or punch, for any purpose, wear safety glasses and require all others around you to wear safety glasses. • Keep all tools cleaned and stored appropriately when not in use. WARNING • Use wrenches — not pliers --• on nuts. • Use screwdrivers with blades that fit the screw. MAINTENANCE • When using a wrench on a tight nut, first use some IN PROGRESS penetrating oil and then use the largest wrench available that fits no doT START the nut. When possible pull on the wrench handle rather than push on it; apply force to the wrench with both hands when possible and with both feet firmly placed. Always s assum e that you may lose your footing;check the place that you may fall for mast derrick to do maintenance or make spar objects.climb the m (derrick) P i Never I repairs.Lower mast,stop engine and deenergize rig before start • Keep all pipe wrenches clears and in good repair.Use aware ing maintenance or repair on mast. brush frequently to clean the jaws of pipe wrenches.An accumu- • Never weld or cut on or near a fuel tank. lation of dirt and grease can cause wrenches to slip. • Do not use gasoline or other volatile or flammable liquids as . Never use pipe wrenches in place of a rod-holding device. a cleaning agent on or around ad ril I rig. • Replace hook and heel jaws when they became visibly worn. I'I -13- -14-