Miller Electric DS-75D12 Removing Safety Collar And Adjusting Boom, Gun Recommendation Table, All

4-9. Removing Safety Collar And Adjusting Boom

4

5

2

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:

2Threaded Rod

3Jam 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.

4Yoke

5Safety Collar

13

Tools Needed: 1-1/8 in

Retain safety collar for use in disas- sembling or moving boom.

	4
	3
Rod	Rod
	2
Increasing Spring	Decreasing Spring
Pressure For A Heavy	Pressure For A
Gun	Lighter Gun

ST-142 599-C

4-10. Gun Recommendation Table

Process	Gun
GMAW − Hard or Cored Wires	Q-Series Guns: 300, 400, 500, And 600 Amp.
FCAW − Self-Shielding Wires	FC-1260 Or FC-1150

4-11. 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 1400 ipm (1.3 To 35.6 mpm)

OM-230 300 Page 14