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| MAINTENANCE |
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| SAFETY PRECAUTIONS | AFTER EACH SPOOL OF WIRE | |||
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| FEED | ||
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| WARNING |
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| • Remove contact tip and clean inside diam- | ||
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| ELECTRIC SHOCK can | eter with short piece of wire | |||
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| kill. | • Clean cable liner – when rough and erratic | |||
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| • Disconnect input power | wire feeding occur. | |||
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| by removing plug from |
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| receptacle before work- | AFTER FEEDING 50# OF FLUX | |||
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| ing inside | CORED WIRE OR 300# OF SOLID | |||
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| only grounded recepta- | WIRE | |||
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| cle. Do not touch electri- | • Unplug machine or turn power switch to | |||
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| cally “hot” parts inside | ||||
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| OFF – “O” position. Remove gun and | ||||
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| cable from machine. | ||
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| • Have qualified person- | • Remove gas nozzle and contact tip from | |||
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| nel do the maintenance | ||||
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| gun | ||||
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| and trouble shooting | ||||
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| • Lay cable out straight - blow out gently | ||||
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| work. | ||||
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| with compressed air. Bend cable back and | ||
forth – blow out again – Repeat until clean.
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ITEMS REQUIRING NO MAINTENANCE
•Drive Motor and Gearbox – Lifetime lubrication
•Fan Motor- Lifetime lubrication.
•Wire Reel Spindle – Do NOT lubricate shaft.
ROUTINE AND PERIODIC MAINTENANCE
BEFORE EACH USE
•Check over machine and accessories for any obvious condition that may prevent safe performance or operation, repair or replace items as necessary to correct any abnormal condition.
AFTER 5 MINUTES OF WELDING or when spatter accumulates in nozzle
•Clean nozzle to avoid bridging between nozzle and contact tip which results in shorted nozzle, poor welds and overheat- ed gun. Hint:
CAUTION
Excessive pressure at start may cause the dirt to form a plug.
PERIODICALLY AS REQUIRED
•Unplug machine or turn power switch to OFF – “O” position.
•Blow dirt out of the welder with low pres- sure air to eliminate excessive dirt and dust buildup that could cause welder to run hot.
•Blow dirt out of: Rectifier & Fan Motor Assembly; PC Board located on Case Side Assembly; and Center Assembly components. Refer to Figure D.4.
•Vacuum accumulated dirt from gear- box and wire feed section. Refer to
Figure D.4
•Inspect the incoming guide tube and clean inside diameter if necessary. Replace when excessively worn.
•Replace Contact Tip – when hole is enlarged or elongated (refer to Changing Contact Tip, below).
