Hobart 6824-1, Operation And Maintenance Manual, Page: 4 / 214

c. Service and Maintenance
This equipment must be maintained in good electrical and mechanical condition to avoid hazards
stemming from disrepair. Report any equipment defect or safety hazard to the supervisor and
discontinue use of the equipment until its safety has been assured. Repairs should be made by
qualified personnel only.
(1) Before inspecting or servicing electrically-powered equipment, take the following precautions:
(2) Shut OFF all power at the disconnecting switch or line breaker before inspecting or servicing the
equipment.
(3) Lock switch OPEN (or remove line fuses) so that power cannot be turned on accidentally.
(4)
Disconnect power to equipment if it is out of service.
(5) If troubleshooting must be done with the unit energized, have another person present who is
trained in turning off the equipment and providing or calling for first aid.
2. Fire And Explosion Prevention
Fire and explosion are caused by electrical short circuits, combustible material near engine exhaust
piping, misuse of batteries and fuel, or unsafe operating or fueling conditions.
a. Electrical Short Circuits and Overloads
Overloaded or shorted equipment can become hot enough to cause fires by self destruction or by
causing nearby combustibles to ignite. For electrically-powered equipment, provide primary input
protection to remove short circuited or heavily overloaded equipment from the line.
b. Batteries
Batteries may explode and/or give off flammable hydrogen gas. Acid and arcing from a ruptured
battery can cause fires and additional failures. When servicing, do not smoke, cause sparking, or
use open flame near the battery.
c. Engine Fuel
Use only approved fuel container or fueling system. Fires and explosions can occur if the fuel tank
is not grounded prior to or during fuel transfer. Shut unit DOWN before removing fuel tank cap. DO
NOT completely fill tank, because heat from the equipment may cause fuel expansion overflow.
Remove all spilled fuel IMMEDIATELY, including any that penetrates the unit. After clean-up, open
equipment doors and blow fumes away with compressed air.
3. Toxic Fume Prevention
Carbon monoxide - Engine exhaust fumes can kill and cause health problems. Pipe or vent the exhaust
fumes to a suitable exhaust duct or outdoors. Never locate engine exhausts near intake ducts of air
conditioners.
4. Bodily Injury Prevention
Serious injury can result from contact with fans inside some equipment. Shut DOWN such equipment
for inspection and routine maintenance. When equipment is in operation, use extreme care in doing
necessary trouble-shooting and adjustment. Do not remove guards while equipment is operating.
5. Medical and First Aid Treatment
First aid facilities and a qualified first aid person should be available for each shift for immediate
treatment of all injury victims. Electric shock victims should be checked by a physician and taken to a
hospital immediately if any abnormal signs are observed.
OM-499
Safety Warnings May 31/94 Revised
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