112 1019567 REV. 03
5.5.14 Removing the Upper Limit Switch (ULS)
1. Turn off the welder and unplug main power.
2. Turn air pressure to zero, then disconnect main air supply.
3. Open the left side cover. See
5.3 Opening and Removing the Left Side Cover (EDP 100-032-338).
4. Remove the Trigger Guard (Section
5.5.9.1 Removing the Trigger Guard).
5. Unplug the 3-pin connector (
Figure 5.31 Removing the Upper Limit Switch (ULS)).
6. Hold the ULS in place and remove the retaining screw (
Figure 5.31 Removing the Upper Limit
Switch (ULS)). Remove the ULS from the welder.
5.5.14.1 Replacing the Upper Limit Switch
1. Line the tab on the back of the ULS with the hole in the Main Support; insert the ULS onto the
Main Support so the tab fits into the hole.
2. Apply one or two drops of Loctite
®
242 to the retaining screw.
3. Install the retaining screw and tighten the screw until snug.
4. Plug in the 3-pin connector.
5. Install the Trigger Guard (
5.5.9.2 Replacing the Trigger Guard).
6. Connect the main air supply.
7. Close the left side cover. See
5.3 Opening and Removing the Left Side Cover (EDP 100-032-338).
WARNING General Warning
Turn air pressure to zero and disconnect the main air supply. Failure
to do this leave the welder under potentially dangerous air pressure.
CAUTION General Warning
The ULS is fragile - do not overtighten the ULS retaining screw.
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