Bird Technologies 8650B Series - Manual (Page 33)

Maintenance
21
10. Lift the pump/motor/bracket assembly out of the equipment.
Note: Make note of the fitting positions.
11. Twist off, counterclockwise, the whole parts of the fittings.
Note: Do not disturb the 25° upward tilt of the 90° input elbow.
Note: Store the detached parts with the disassembled unit and return
the pump/motor /bracket assembly to the factory for replacement.
Installing the Pump/Motor Assembly
To install the pump/motor reverse the removal procedures.
Note:
z When installing the pump/motor, make sure the unit is placed so
that the top panel will not hit the top of the unit.
z Coat only the external threads with a pipe sealing compound when
replacing the threaded fittings.
z Coat only the external threads, to avoid pressing the pipe sealing
compound into the cooling system and contaminating the coolant.
z Twist on the threaded fittings, until the treaded joints are tight
and all parts are in their original angular position.
z Rewire to the same terminal block connections.
Replacing the Water Pressure Switch
The water pressure (Safety Control) switch is changed by the same process
that is used for replacing the load resistor.
Perform the following disassembly operations. It is not necessary to fully
remove the load resistor from the unit, or to disturb its output fitting.
z Equipment Needed:
z
Common hand tools
1. Turn off RF power and interlock circuitry before any electrical disconnec-
tions are made.
2. Disconnect the RF coaxial line.
3. Remove the 3/8-16 bolt and nut sets that secure the flanges.
4. Separate the transmission coaxial air line from the load connector.
Note: Make sure the center conductor bullet remains in the trans-
mission line.
5. Take off the top panel by removing the 26 screws around its perimeter.
6. Turn all four handles outward and slightly lift up the top panel assembly.
7. Reach under the top panel and press the connector latch of the fan power
cable.
Note: This will disconnect the small fan-supply plug from its mat-
ing connector seated on top of the radiator block.
8. Unscrew the drain plug at the bottom center of the rear panel.
9. Allow the coolant to drain.
WARNING
Never attempt to connect or disconnect an RF transmission line while
power is on at the RF power source. Radiated RF energy is a potential
health hazard.