Emerson 2000IW Maintenance Manual page 122

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.
WARNING
3. Open the left side cover. See
4. Remove the Trigger Guard (Section
5. Unplug the 3-pin connector
6. Hold the ULS in place and remove the retaining screw
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.
CAUTION
2. Apply one or two drops of Loctite
3. Install the retaining screw and tighten the screw until snug.
4. Plug in the 3-pin connector.
5. Install the Trigger Guard
6. Connect the main air supply.
7. Close the left side cover. See
112
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.
5.3 Opening and Removing the Left Side Cover (EDP
5.5.9.1 Removing the Trigger
(Figure 5.31 Removing the Upper Limit Switch
General Warning
The ULS is fragile - do not overtighten the ULS retaining screw.
®
242 to the retaining screw.
(5.5.9.2 Replacing the Trigger
5.3 Opening and Removing the Left Side Cover (EDP
Guard).
(ULS)).
(Figure 5.31 Removing the Upper Limit
Guard).
1019567 REV. 03
100-032-338).
100-032-338).