OM-116 Page 6
SECTION 4 – MAINTENANCE & TROUBLESHOOTING
4-1. Routine Maintenance
Y Disconnect power before maintaining.
3 Months
Replace
Unreadable
Labels
Repair Or
Replace
Cracked
Cables
Clean
And
Tighten Weld
Connections
6 Months
12 Months
Blow Out Or Vacuum
Inside,
During Heavy Service,
Clean Monthly
OR
Lubricate
Shunt
Block
4-2. Lubricating Shunt Block And Anti-Noise Adjustment
ST-155 498-A
Y Turn Off welding power
source and disconnect input
power.
1 Shunt Block
Apply light coating of high-tempera-
ture grease to shaded areas of both
shunt blocks.
Install amperage control handle
and locking pin. Turn handle to
spread grease evenly.
2 Noise Adjustment Screws
If shunt block vibrates and be-
comes noisy, tighten adjustment
screws 1/4 turn. Install wrapper,
handle, and pin, turn On unit, and
check for shunt noise. Repeat pro-
cedure until noise stops. Do not
overtighten. Call your nearest Fac-
tory Authorized Service Agent if
noise continues.
Reinstall wrapper, handle, and pin.
Tools Needed:
Y Install wrapper before turning On power.
1
2
1
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