OM-1500-13 Page 14
4-8. Removing Safety Collar And Adjusting Boom
ST-142 599-C
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.
1
2
4
3
2
3
4
Rod
Rod
Increasing Spring
Pressure For A Heavy
Gun
Decreasing Spring
Pressure For A
Lighter Gun
Tools Needed:
1-1/8 in
5
4-9. Gun Recommendation Table
Process
Gun
GMAW
−
Hard or Cored Wires
Roughneck C-Series Guns: 300, 400, 500, And
600 Amp.
FCAW
−
Self-Shielding Wires
FC-1260 Or FC-1150
4-10. Wire Type, Size, And Feed Speed Capability Table
Motor Speed
Wire Type
Wire Size
Feed Speed Capability
Standard
All
.023 To 5/64 in (0.6 To 2 mm)
50 To 780 ipm (1.3 To 19.8 mpm)
Standard
All
3/32 To 7/64 in (2.4 To 2.8 mm)
50 To 700 ipm (1.3 To 17.8 mpm)
Standard
All
1/8 in (3.2 mm)
50 To 300 ipm (1.3 To 7.6 mpm)
Optional High
Speed
All
.023 To 5/64 in (0.6 To 2 mm)
92 To 1435 ipm (2.3 To 36.4 mpm)
Содержание DS-74D12 Swingarc
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