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Lock Test

  1. Using proper starter bench tester, connect test equipment and lock starter armature. Engage tester momentarily, while measuring starter torque, current draw and voltage drop.
  2. Voltage should not drop more than 5 volts from voltage at beginning of test. Current draw should be less than 400 amps. Starter should produce minimum torque of 6.5 ft. lbs. (9 N.m).
  3. Low current draw and no torque during lock test may be caused by excessive resistance between brushes and commutator. Normal current draw, but low torque speed, may be caused by a shorted commutator and/or poor insulation.
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