Bird Technologies 8201 - Manual (Page 23)

Disassembly
There are no special techniques required for the repair or
replacement of components in the Models 8201 and 8203
loads. A screwdriver is the only tool needed.
RF Connector
Replacement
The connector is a patented “Quick Change” design which
permits easy interchange with the use of only a screwdriver.
This process does not interfere with the essential coaxial
continuity of the load resistor RF input or the coolant oil
seal. For replacement, proceed as follows:
1. Remove the four 8-32 x 5/16 inch round head
machine screws from the corners of the RF con-
nector.
2. Pull the connector straight out of its socket.
Diaphragm
and Coolant
Oil
Remove the diaphragm to replace or examine the coolant
oil. Replacement of the diaphragm and coolant are listed in
the steps below:
1. Stand the load vertically, with the back end up.
Brace it carefully to avoid tipping it over.
2. Loosen the clamp screw until the clamping band
is released.
3. Remove the diaphragm cover and lift the dia-
phragm from the back end of the radiator tank.
Inspect the diaphragm. It should be soft and pli-
able. If it has hardened or shows signs of surface
cracks, replace it.
4. The coolant oil level should be about one inch be-
low the top of the radiator cylinder. If the oil ap-
pears to be contaminated; i.e., it doesn’t have a
clear light yellow color, replace it.
RF Load
Resistor
Assembly
To replace the load resistor assembly, it is not necessary to
drain the unit of coolant oil. Follow the steps below:
1. Stand the load vertically, with the front end up.
2. Loosen the clamp screw until the clamping band
is released.
3. Hold the load assembly by the RF connector and
pull the assembly slowly out of the radiator. Al-
low the excess coolant to drip back into the radi-
ator.
Maintenance
13