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4-9. Removing Safety Collar And Adjusting Boom
1
3
Tools Needed:
1-1/8 in
4-10. Gun Recommendation Table
Process
GMAW − Hard or Cored Wires
FCAW − Self-Shielding Wires
4-11. Wire Type, Size, And Feed Speed Capability Table
Motor Speed
Wire Type
Standard
All
OM-230 300 Page 14
4
5
2
Rod
Increasing Spring
Pressure For A Heavy
Gun
Gun
Q-Series Guns: 300, 400, 500, And 600 Amp.
FC-1260 Or FC-1150
Wire Size
.023 To 5/64 in (0.6 To 2 mm)
1
Locking Knob
Tighten knob to prevent boom
movement. Loosen knob to allow
boom movement. Change knob po-
sition to limit upward movement.
Pull boom down slightly and re-
move safety collar. Boom should
balance in any position from hori-
zontal to 60 degrees above hori-
zontal. If necessary, adjust boom
as follows:
2
Threaded Rod
3
Jam Nut
Loosen jam nut and turn threaded
rod until boom balances. Tighten
jam nut. Be sure several full threads
are through yoke to prevent boom
falling.
4
Yoke
5
Safety Collar
Retain safety collar for use in disas-
sembling or moving boom.
4
3
Rod
2
Decreasing Spring
Pressure For A
Lighter Gun
Feed Speed Capability
50 To 1400 ipm (1.3 To 35.6 mpm)
ST-142 599-C
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