Miller D-74 MPa Plus, Owner'S Manual

Page: 21 / 40

OM-254063 Page 17
5-8. Removing Safety Collar And Adjusting Boom
142599-F
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
5-9. 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)