TM 9-4910-663-34
d.
Remove the 10 1/4-20 bolts that retain the plenum chamber, bracket, and load bank, and remove the load bank.
e.
Reverse the procedures of steps a through d to install the load bank.
2-18.
REMOVAL AND INSTALLATION OF DIODE ASSEMBLY (fig 2-10)
a.
Disconnect main power from the test stand.
b.
Remove the panel retaining hardware from the upper and lower rear panels of the test stand, and remove the
upper and lower rear panels.
c.
Unsnap all leads from the three rectifiers on the diode assembly.
d.
Unsolder the leads from suppressor B4.
e.
Remove the two 10-32 screws, washers, and nuts that attach the diode assembly to the test stand.
f.
Remove the diode assembly from the test stand.
g.
Reverse the procedures of steps a through f to install the diode assembly in the test stand.
2-19.
REMOVAL AND INSTALLATION OF VARIDRIVE ASSEMBLY (fig 2-10)
a.
Remove the panel retaining hardware from both the upper and lower rear panels of the test stand and remove
the upper and lower rear panels.
b.
Start the varidrive and turn the speed control until the chain connecting link is positioned at the top of the
varidrive sprocket. This may require a few start-speed change-stop operations. Then, stop the varidrive.
c.
Disconnect main power from the test stand.
d.
Remove the load bank assembly from the test stand. (Refer to paragraph 2-16.)
e.
Remove the chain connecting link from the chain, and remove the chain from the varidrive sprocket.
f.
Remove the retaining hardware that attaches the link board assembly (fig 2-8) to the test stand, and lower the
link board assembly. (Refer to para 2-15.)
g.
Disconnect all varidrive wire leads (tag wires for identification) from the rear of the link board assembly.
h.
Remove the battery vent hose clamp (fig 2-10) from the right panel of the varidrive assembly. Disconnect the
vent hose from vent tube.
Change 1 2-72
