Eastwood MIG 175, Service Manual

Page: 9 / 20

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9
SHIELDING GAS FLOW ADJUSTMENT
After connecting your Shielding Gas Regulator, the gas fl ow rate needs to be adjusted so that the proper amount of Shielding Gas is fl owing over your weld. If
there is too little gas fl ow there will be porosity in your welds as well as excessive spatter, if there is too much gas fl ow you will be wasting gas and may affect
the weld quality. The included regulator has 2 gauges on it; the gauge on the left is your fl ow rate while the gauge on your right is your tank pressure.
1.
Open your Shielding Gas tank valve all the way.
2. Adjust the knob on the regulator to ~30 CFH.
3. Turn on the welder and trigger the torch switch which will start the gas fl ow.
4.
As you trigger the torch switch you will notice that as the gas fl ow starts the needle on the gauge drops to a steady reading. The reading while fl owing is
the value you want to read.
5. The gas fl ow should be set to ~20CFH while fl owing. The CFH (Cubic Feet per Hour) scale is the inside scale in red on your fl ow gauge. 20CFH is the most
typical fl ow rate but it may need to be adjusted in some cases depending if there is a slight breeze or some other instance where additional shielding gas
is required to prevent porosity in the weld.
6. When fi nished welding remember to close the gas valve on the bottle.
CHANGING THE DRIVER ROLLER
The wire feed drive roller on the drive motor has 2 grooves, one for 0.023” (0.6mm)
welding wire and another for 0.030” (0.8mm) or 0.035” (0.9mm) welding wire. Your
MIG175 comes with the drive roller pre installed for using 0.030” (0.8mm) wire. In the
event that 0.023” welding wire is to be used, the wire feed roller needs to be changed.
1.
Turn off the welder and unplug the welder from power.
2. Unlock the Tensioner (FIG. I1) by pulling it towards you.
3. Lift the Rocker Arm (FIG. I2) up and rotate out of the way.
4.
Remove the star knob
(FIG. I3)
by loosening it by hand.
5. Slide the drive roller off the shaft.
6. Determine which size wire is going to be used and slide the drive roller back
onto the shaft by aligning the key on the shaft with the keyway on the roller.
NOTE: The stamped marking on the side of the drive roller indicates the size
of the groove on the opposite side of the roller. The groove closest to the drive
motor is the groove that will be used. If setting up to use 0.023” (0.6mm) wire,
the ‘0.6’ stamping should be facing the user when installing it.
7.
Tighten the star knob fi nger tight.
8. Push the rocker arm back down into place.
9. Lift up on the Tensioner to put back in place and adjust as necessary.
FIG. I
✓
I1
✓
I2
✓
I3