Horn Assembly Replacement; Pump Replacement; Caution - MSA Orion Manual De Operaciones

Chapter 6, Warranty, Maintenance and Troubleshooting

Horn Assembly Replacement

The Horn Assembly must be replaced at an authorized factory
service center.

Pump Replacement

Before handling the circuit boards, ensure you are properly
grounded; otherwise, static charges from your body could
damage the electronics. Such damage is not covered by
the warranty. Grounding straps and kits are available from
electronics suppliers.
1. Turn the power OFF.
2. Remove the battery pack.
3. Remove the pump cover or calibration cap, if installed.
4. Remove the sensor cover and sensors.
5. Remove the four remaining case mounting screws from the
back of the case.
When removing the back of the case, be careful not to pull
the pump wires from the connector. Use minimum force
necessary to disengage this connector to prevent breakage.
6. Remove the pump connector.
7. Disconnect the pump outlet tube. Place a small, flat
screwdriver at the base of the tube and gently pry the tube
away from the barb.
8. Remove the mounting screw and disc which retains the pump.
9. Remove the pump; gently pry the pump inlet tube from the
elbow fitting, be careful not to damage the elbow fitting.
10. Install the new pump; re-install the mounting screw and disc,
and attach the pump inlet tube to the elbow fitting.
11. Position the rear case at a 90-degree angle from the front
case and connect the pump outlet tube to the barb
protruding through the circuit board; route the outlet tube
between the pump and the in-line filter.
12. Connect the pump cable.
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" CAUTION

"! CAUTION
Operating Manual