Miller Electric OM-4409 - Manual (Page 60)

OM-4409 Page 56
10-6. Adjusting Compressor Air Pressure
803 228
Tools Needed:
Check compressor air pressure using
air pressure gauge known to be accu-
rate. If necessary, adjust air pressure
as follows:
1
Screw
Loosen jam nut securing screw. Turn
screw clockwise (increase pressure)
or counterclockwise (decrease) until
pressure is 125 psi (862 kPa).
.
Maximum weld output is reduced
if compressor air pressure is set
above 125 psi (862 kPa).
Tighten nut.
2
Pressure Relief Valve
Pressure relief valve opens and re-
leases pressure at 150 psi (1034
kPa). The pressure relief valve is not
adjustable.
1
2
5/16, 3/8 in