TM 9-4910-663-34
i.
Remove the drive bracket assembly (fig 2-11) from the varidrive output pad by removing six 7/16-14 bolts from
the rear of the varidrive output pad.
(1)
Remove the tachometer generator mounting bracket retaining hardware and remove the tachometer
generator mounting bracket from the varidrive.
(2)
On part number 7458-4, detach the six adapters from the lubrication fittings on the varidrive.
j.
Remove the four 5/8-11 varidrive retaining bolts, nuts, washers, and lockwashers, and the grounding wires.
k.
Install a heavy duty chain from each lifting eye at the sides of the varidrive to the forward lifting eye. Make the
chains taut.
l.
Insert the tongue of a 1500-pound capacity fork lift under the chains, and raise the varidrive assembly slightly.
m.
Guide the varidrive assembly and remove it from the test stand. Guide the motor end of the varidrive out first,
being careful not to come in contact with the rheostat assembly.
n.
Reverse the procedures of steps a through m to install the varidrive assembly in the test stand.
2-20.
REMOVAL AND INSTALLATION OF DRIVE BRACKET ASSEMBLY (fig 2-11)
a.
Remove the six bolts and lockwashers that attach the bracket assembly to the varidrive.
b.
Remove the drive bracket assembly from the test stand.
c.
Reverse the procedures of steps a and b to install the bracket assembly in the test stand.
2-21.
REMOVAL AND INSTALLATION OF STARTER MS1 (fig 2-8)
a.
Disconnect main power from the test stand.
b.
Open the high voltage compartment door. Disconnect the three power leads from terminals L1, L2, and L3 of the
starter.
c.
Disconnect the three power leads from terminals T1, T2, and T3 of the starter.
d.
Remove the three 1/4-20 bolts that attach the starter to its mounting bracket.
e.
Pull the starter gently approximately 2 inches toward the front of the test stand. Remove the control wires from
the L2, L3, and common terminals of the starter.
f.
Tip the front of the starter up and remove the control wires from the right-side overload and lower right coil
terminals.
g.
Remove the starter from the test stand.
h.
Reverse the procedures of steps a through g to install the starter in the test stand.
Change 1 2-73
