Photocoupler/Pulser Disc Replacement - Wayne Dresser Vista 1 Series Service Manual

7.1.8.

Photocoupler/Pulser Disc Replacement

Note: Pulser discs are fragile. Care should be taken when removing the pulser components.
1. Remove the cover from the pulser assembly by inserting a small flat blade
2. Disconnect the cable to the photocoupler.
3. Remove the snap pin (item 2 in Figure 7-7.) holding the photocoupler to the
4. Slip the new pulser parts into the housing. Use a new snap pin to install a
5. Reconnect the cable to the photocoupler.
6. Rotate the disk through two or three revolutions to ensure that it does not
7. Replace the cover by placing the narrow end of the cover onto the pulser
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Part No. 920160 Rev A
screwdriver into the narrow side of the cover where it connects to the
mounting leg of the pulser bracket. See Figure 7-7. for an exploded view of
the Pulser Assembly).
housing. Pull the pulser parts up and out of the housing.
photocoupler.
contact the photocoupler.
bracket at the photocoupler cable/grommet location. Pull forward to engage
the grommet and lower the cover down, avoiding contact with the disc, and
snap the cover in place.
February 1997