TM 55-4920-227-15
Section III. OPERATION UNDER USUAL CONDITIONS
the generator to the generator mounting
19. General
Instructions in this section are published for
the
bracket with 12 hex nuts.
information and guidance of personnel responsible
for
(4) Connect the flexible air hose (1, fig. 1) to the
the operation of this equipment. It is essential that
the
air inlet on the generator cover.
operator knows how to perform every operation
for
(5) Start the test stand (para. 20). Depress the
which the equipment is capable.
RAISE button (3, fig. 9) until the desired rpm
for the generator under test is indicated on
the tachometer indicator (1). When the test
20. Operating Procedure
a. Perform the before-operation services as
is completed, press the LOWER button (4)
described in paragraph 33.
reducing the varidrive speed to a minimum
and stop the test stand.
test stand approximately 1 minute before increasing the
(6) Remove the generator from the test stand
varidrive speed.
and place the coupling, adapters, and
c. Depress the RAISE button (3) and observe the
mounting flanges in the storage box.
varidrive speed increase from 1000 to 11,000 rpm on the
tachometer indicator (1).
Caution: Do not remove any unit
d. Press the LOWER button (4) until the varidrive
from the test stand until the varidrive has
Speed is reduced to a minimum. Stop the test stand by
come to a complete stop.
depressing the STOP button (6).
b. Adapter Mounting (5 inch diameter bolt circle).
(1) Check the unit to be tested to determine
21. Generator Mounting Details
a. Direct Mounting (10 inch diameter bolt circle).
whether to use the high- or low- speed head
(1) Check the unit to be tested to determine
of the varidrive.
whether to use the high- or low- speed head
(2) Install the coupling (4, fig. 11) as described
of the varidrive.
in a above.
(2) Install the machine key (2, fig. 10) in the
(3) Install the adapter plate (6) on the generator
keyway of the desired driveshaft (8). Aline
mounting bracket (1) and secure with 12
the keyway in the coupling (3) with the key
nuts (7).
in the driveshaft, and slide the coupling onto
(4) Slip the correct splined bushing adapter (5)
the shaft. Secure the coupling to the drive
over the end of the rotor shaft. Position the
shaft with the setscrew (7).
generator (8) on the adapter plate (6),
(3) Slip the correct splined bushing adapter (4)
simultaneously insert the splined adapter (5)
over the end of the rotor shaft (5). Position
into the coupling (4). Secure the generator
the generator (6) on the generator mounting
to the adapter plate with 2 nuts (9). Connect
bracket (1), and simultaneously insert the
the flexible air hose, and operate as
splined adapter into the coupling (3). Secure
prescribed in paragraph 21.
AGO 6729A
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