TM 9-4910-663-12
Testing Free Running (No Load) Starters.
g.
CAUTION
There are some starter motors for which manufac-
turers recommend that free running tests be con-
ducted at voltages considerably below nominal
voltage rating of motor. Be sure that tests are
conducted in accordance with procedures recom-
mended by manufacturer.
NOTE
Some starters must be connected to AC/DC SYSTEMS
ING SW binding post (S33, fig 2-3). With all LOAD
SELECTION switches (S17 through S24, fig 2-2) set
to OFF, set MASTER LOAD DISCONNECT switch (S8) to
ON, and set BATTERY CIRCUIT SELECTOR switch (S6)
to proper voltage setting.
(1) Install starter on test stand.
(2) Connect power leads from starter to appropriate starter ter-
minals. (Refer to fig 2-27, 2-28 and 2-29.)
(3) Connect test leads from starter cable connections to STARTER
FREE RUN binding post (fig 2-3) and STARTER COMMON binding post.
(4) Connect EXTERNAL DC VOLTAGE INPUT binding posts (fig 2-2) to
starter input.
(5) Set DC VOLTMETER OUTPUT VOLTAGE SELECT switch (S11, fig 2-1)
to EXT position.
(6) Set DC AMMETER LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE
CURRENT RANGE switch (S14, fig 2-1) to STARTER X4 position.
(7) Set STARTER TEST switch (S9, fig 2-2) to ON.
(8) Adjust STARTER RHEOSTAT control (R18, fig 2-2) clockwise
while monitoring voltage and current for appropriate settings.
(9) Check rpm of starter with hand tachometer (vibration type).
(10) Perform tests specified by starter manufacturer.
(11) Adjust STARTER RHEOSTAT control (R18, fig 2-2) to near full
resistance position by rotating in counterclockwise direction, main-
taining slight pressure on carbon stack.
(12) Upon completion of tests, position STARTER TEST switch (S9,
OFF .
2-45
