under test it may be necessary to use a gen-
ing post to the (+) terminal stud on
erator of corresponding output voltage. In
the starter (cranking motor).
other instances using a 24-volt generator
for lower voltage starter tests is accom-
plished by dropping the generator output
voltage with the adjustment of the generator
the starter frame (ground) using
regulator, the speed (rpm) of the generator,
and the setting of the 40-ohm or 250-ohm
shows an example of a hook-up from
field current rheostat (52 and 55, fig. 16) of
t h e input No. G- binding post
the test stand (adjustment of this rheostat
is explained in detail in sections II, III, and
(ground). This binding post in turn
of voltage and speed may be necessary when
should be connected to the frame
the generator is under load, care should be
(ground) of the generator being
exercised to prevent ceiling volts and speci-
used in the test.
fied field current being exceeded when load
is dropped.
positive (red) and negative (black)
(a) Mount a direct-driven generator of
binding posts of the test stand to
proper voltage and current rating
the starter (cranking motor) under-
for the starter (cranking motor)
(f)
going test as prescribed in
undergoing test as prescribed in
(g) T h e no load (free running) test
generator input binding posts (13,
will be performed the same as, a
fig. 15). Refer to generator
test pro-
above, except with the battery on-off
cedures under chapter 3 for connect-
switch (22) in the "OFF" position
ing the generator of the voltage rat-
and with use of the generator to
ing being used.
supply the required voltage and cur-
(b) Mount a generator regulator or a
rent to operate the starter (crank-
generator control box on the regu-
ing motor).
lator mounting bracket of the test
Note. For instructions to operate the
stand and connect it to the regulator
generator being used during starter
binding posts (10, fig. 15). Refer to
(cranking motor) tests above, refer to
g e n e r a t o r regulator or generator
control box test procedures under
the generator.
(h) After the test is completed place the
ator regulator or generator control
box of the voltage rating being used.
above, in positions indicated in
column
of the table.
(c) Connect the starter free-run binding
post (11-B, fig. 15) to the generator
regulator, and all cable harnesses
input No. G+ binding post (13-A,
and test leads connected to the test
stand, but let all cable harnesses and
test leads connected to the starter
should be connected to the (+) in-
(cranking motor) remain in place.
put terminal on the generator being
C o n t i n u e with the stall torque
used in the test. Example: on the
(measuring stall current and
torque) test in c below.
(+) input terminal is marked "A".
c. Using the Test Stand for Power Source for
(d) Connect the starter input binding
S t a l l Torque (measuring stall current and
torque) test.
minal stud on the starter (cranking
motor) using cable harness 38405.
(1) Purpose. This test is performed to in-
dicate the functioning of the starter
hook-up from the starter input bind-
(crank motor) when there is a load