TM 9-4910-663-12
CAUTION
If the BATTERY CIRCUIT SELECTOR switch is set to
the ON position while testing a generator, the
generator can be motorized.
Install batteries into the battery compartment (4, fig 4-3).
h.
Provisions are included for the installation of four 6-volt batteriesr
or two 6-volt batteries and one 12-volt battery; two 12-volt bat-
teries; or one 24-volt battery. Refer to fig 2-8 for cabling infor-
mation. The use of four 6-volt batteries or two 6-volt batteries
and one 12-volt battery allows for battery voltage selection of 6,
12, or 24 volts.
2-4. MOUNTING OF COMPONENTS TO BE TESTED. The following paragraphs
contain the instructions to mount the component to be tested.
Mounting Direct Driven Generator/Alternators (fig 2-9).
a.
(1) On part number 7458-4, raise the hinged output shaft guards
on the test stand. Position the pivot arm (1) to the drive output
shaft (1, 3, fig 1-2) desired, depending upon the speed range of the
generator/alternator. To swing the pivot arm (1) from one output
shaft to the other, remove the two 3/8-24 nuts which secure the pivot
arm (1) to the hex locating studs (2) and slide entire assembly away
from the drive output shaft. Swing the pivot arm assembly to the
other output shaft and slide towards drive such that hex locating
studs protrude through the pivot arm assembly and secure with two
3/8-24 nuts.
(2) Mount the spline coupling (5) to the drive output shaft
using the square key (4) and secure the coupling by tightening the
set-screws.
(3) If the generator/alternator has a 16-tooth spline shaft,
insert the spline bushing adapter (6) into the splined coupling.
(4) If a 10-inch bolt circle generator/alternator is to be
tested, mount this directly to the pivot arm and secure with the
3/8-24 nuts.
(5) If the 5-inch circle generator/alternator is to be tested,
mount the adapter flange (3, fig 2-9). Mount the generator/alternator
to the adapter flange. Secure with 3/8-24 nuts.
(6) After the above mounting procedures, go to para 2-5 for
operation of the test stand.
Always remove spline couplings and spline bushings
from drive output shafts if not used.
Change 1
2-17