Bird Technologies 8730 Series - Manual (Page 29)

Maintenance
17
Removing the Resistor
Numbers in brackets [ ] refer to the labeled parts in Figure 7. Parts may
appear slightly different than what is shown for some models.
1. Disconnect the load from the RF line and the interlock control box, remove
the water hoses, and drain off any water still in the load.
2. Turn the load on end with the hose fittings up.
3. Remove the screws from the back of the water chamber assembly. These
secure the water chamber assembly to the load housing [0].
Note: The 8731 has only one screw, on the side of the water cham-
ber assembly. Also, the water chamber is threaded, and screws into
place. Turn the water chamber counterclockwise until the threads dis-
engage before pulling the assembly out.
4. Pull the water chamber assembly out.
Note: It may be necessary to rock the chamber gently while pulling.
Note: If the resistor is intact then the entire resistor assembly [2]
may be pulled straight out of the load housing.
Inspection
When the resistor has been successfully removed, inspect it carefully to insure
that it has not been fractured. In most cases, even in the event of complete
resistor burnout the resistor will remain intact.
Examine the inside of the load housing and water chamber for damage to inter-
nal parts, especially the resistor O-Ring seal and the resistor contact strip. If
the O-Ring has cracks or if the contact strip has missing fingers, replace them.
If the resistor did fracture, thoroughly rinse all parts under clear running
water and dry before any assembly.
Replacing the Resistor
1. Insert the plugged end of the new resistor into the resistor fitting of the
center conductor assembly [8] to test its tightness.
2. The resistor should be snug but should not have to be forced into the fitting.
Note: If the resistor is too loose, press the fitting fingers together
slightly and try the resistor again. Continue closing the ends of the
resistor fitting until a snug fit is obtained.
WARNING
If the resistor breaks, there may be splinters or sharp pieces inside the load
housing. Be careful when repairing to avoid being cut.
CAUTION
Do not remove the resistor plug. Any attempt to do so will cause leakage
and resistor damage.