Miller Electric 625 - Manual (Page 32)

OM-216 244 Page 28
8-3. Maintenance Procedures for Stud Gun
When is Maintenance Required?
Maintenance requirements will vary with environment and usage. Dirty
work areas or high volume stud welding will require more frequent main-
tenance.
There are three primary reasons for maintenance:
• Dirt - Dirt can enter the lifting mechanism and cause erratic lift and
plunge operations. Typically , cleaning is all that is required.
• Wear - Components do wear out over time. Typically, items such
as plastic bearings or cables wear out and need to be replaced.
• Improper Use - Components can arc out by inadvertently placing
them against grounded materials during a weld sequence. Also, by us-
ing the gun as a hammer to test welds will damage parts and require
maintenance.
Maintenance Steps
Proper Maintenance Procedures:
• Disassemble the gun.
• Inspect all parts for wear or damage.
• Replace worn or damaged components.
• Clean all components.
• Reassemble components.
• Adjust settings and test.
Disassembly / Assembly Procedures:
Y To prevent accidental activation disconnect the gun from the
power source before adjusting or servicing the gun.
.
Remove all accessories from gun before servicing.
.
Items referenced ( ) will correspond with list items.
1 Legs: Loosen set screws (23) and pull legs (not shown) straight out.
Inspect legs for damage and straightness, replace if necessary.
2 Chuck (Not Shown): Insert chuck key into chuck adapter and turn
key 180 degrees. Inspect chuck for damage. If taper on chuck
appear worn out replace chuck.
3 Dust Bellows (3): Remove dust bellows by sliding over end of chuck
adapter. The bellows prevent contaminates from entering the
internal mechanisms of the gun. If bellows has holes or is torn,
replace.
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