Starter torque test.
(d) The starter is activated by turning the starter switch (27) to
the ON position. A hand tachometer is used to measure the starter RPM.
(e) Vary starter voltage adjuster control (24) until a voltage of
The minimum speed should be 7,000 RPM.
The maximum current draw should be 90 amperes.
(2) The stall torque test (fig 34) is performed to determine the amount
of torque, in foot-pounds, exerted by the starter when under load. This test must
be short in duration and the torque arm must be securely attached with the scale
support bolted down securely (fig 32).
(a) Figure 34 shows the connections to the 500-ampere test stand.
The main difference between free run and torque connections are the DC ammeter
shunts. Since the starter is not allowed to turn, it doesn't build up any back
EMF. Therefore, the starter will have a very low resistance and cause an extremely
high current drain.
OS 010, 6-P26