Lincoln Electric IM670-A manual Maintenance, Safety Precautions

D-1 MAINTENANCE D-1

SAFETY PRECAUTIONS

WARNING

ELECTRIC SHOCK can kill.

•Disconnect input power by removing plug from receptacle before working inside Cooler.

•Do not operate with covers removed.

•Use only grounded receptacle.

•Do not remove the power cord ground prong.

•Do not touch electrically “hot” parts inside Cooler.

•Have qualified personnel do the installation, maintenance and troubleshooting work.

•Gently rinse the strainer under running water to thor- oughly clean it.

•Use a mirror to inspect the inside of the pump for contamination. Carefully remove hardened debris with a dental pick if necessary, without scratching the inside of the pump.

•Reinstall the strainer and 7/8 acorn nut, tightening with 75+/-15 in-lbs. of torque. Wipe dry all area wet- ted with coolant. Dispose of coolant soaked towels properly as specified above.

•For a more in depth procedure, See Section D-2, “Pump Inlet Strainer”.

See additional warning information at the front of this operatorʼs manual.

------------------------------------------------------------

ROUTINE MAINTENANCE

Remove accumulated dust and dirt from the internal components of the cooler by blowing it out with a low- pressure air hose or removing it with a vacuum hose.

PERIODIC MAINTENANCE

In dirty or dusty environments or if biological growth occurs in the coolant, it may be necessary to flush the coolant reservoir. Drain the old coolant, rinse the inside of the reservoir and circulate rinsing solution through the coolant system. Add new coolant when cleaning is finished. It is recommended to flush the coolant at least once a year. A cooling system free from debris offers increased cooling efficiency and longer pump and torch life. See the Coolant Treatment Recommendation in this “Section D-2”.

NOTE: Pure solutions and mixtures of, or materials (i.e. towels wetted) with ethylene glycol are toxic to humans and animals. They must not be haphazardly discarded, especially by pouring liquids down the drain. Contact the local EPA office for responsible dis- posal methods or for recycling information

PUMP MAINTENANCE

The pump head has a "built in" strainer on the inlet side of the pump. It is recommended to clean or replace the pumps inlet strainer at least once a year. (See Above):

•Drain the coolant reservoir and all coolant lines. Dispose of the coolant properly as specified in NOTE above.

•Hold the pump head firmly to apply a counter-torque when loosing the strainer's 7/8" acorn nut located on the bottom. Do not confuse with 3/4" acorn nut. Remove nut and slide inlet strainer down and out from the pump head.

PUMP MOTOR

The COOL ARC® 40 is rated for continuous opera- tion. It is recommended to re-oil the pump motor bearings once a year as follows:

•Remove the plastic plugs located on the top of both the inboard and outboard bearing end-caps.

•Re-oil each bearing with 30-35 drops of SAE 20 oil then reinstall both plugs.

HEAT EXCHANGER

To maintain maximum cooler efficiency, the heat exchanger should be kept free of dust and dirt build- up. Clean the heat exchanger periodically using a vac- uum hose or a low-pressure air line. Avoid placing the unit near a flux hopper or a flux waste container. A clean heat exchanger offers better cooling perfor- mance and longer product life. In extremely dirty envi- ronments, it may be necessary to remove the heat exchanger completely from the cooler and clean the fins with soap and water. Use care to avoid damaging the fins.

RESERVOIR COOLANT LEVEL

The reservoir volume should be checked daily before using the cooler. Remove the reservoir fill cap and check the coolant level. The reservoir is full when the coolant level is just below the reservoir fill opening with the unit in the upright position. Keep the reservoir full, especially after disconnecting the water lines or changing the accessory being cooled.

COOL ARC® 40