Ametek 387 Service Manual page 32

The SMC and tachometer are mounted using standard U-brackets. To replace the
SMC or tachometer:
1. Unplug the connectors from the rear of the gauge by depressing their tabs while
pulling the connector straight out.
2. Remove the two nuts and lock washers holding the U-bracket and remove the U-
bracket.
3. Remove the instrument from the front of the panel.
4. To reinstall, place the instrument through the front of the panel and line up the
alignment tab at the bottom with the cutout notch in the mounting hole.
5. Attach the U-bracket to the instrument and secure with the nuts and lock washers.
6. Reattach the connectors.
Follow the instructions in Figure 4-1 to remove and reinstall the 2-inch gauges.