TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 battery cable connections to starter and three screws which secure housing (16, figure 13-4) to engine.  Tag and remove wires to the pilot relay (6, figure 13-4). b. Inspection.  Remove inspection plug (102, figure 13-4).  If any brush is less than 3/8 inch (9.5 mm) long, the complete set of brushes should be replaced. c. Test.  Testing of the starter motor assembly consists of a no-load test of the complete unit and component tests to determine part serviceability. Before conducting the no-load test check the armature for freedom of rotation.  Use a screw driver to turn the pinion on the exposed drive assembly (25, figure 13-4) in the drive housing (16).  Tight bearings, bent armature shaft, or a loose pole shoe screw will cause armature binding.  If the armature does not turn freely, disassemble the unit immediately.  If the armature rotates freely, conduct the no-load test below before disassembling the motor. CAUTION Do not allow the starter motor to operate more than 30 seconds.  Allow it to cool at least two minutes before reenergizing the motor.  Overheating will damage the motor. (1) Connect the starter assembly as shown in figure  13-5. (2) Close the switch and vary the carbon pile to obtain 20 volts on the voltmeter. (3) Starter motor speed at a minimum current draw of 95 amps shall be 5500 rpm. Motor speed at the maximum current draw of 120 amps shall be 7500 rpm. (a) Low speed and high current draw indicate armature drag caused by tight, dirty or worn bearings, bent armature shaft or loose pole shoes, a shorted or grounded armature and fields. (b) Failure to operate with high current draw indicates a direct ground in the terminal or fields. (c) Failure to operate with no current draw indicates an open field circuit, open armature coils, broken brush' springs, worn brushes, high insulation between commutator bars or other conditions resulting in poor contact between the brushes and commutator. (d) Low speed and low current draw indicates high internal resistance due to poor connections, defective leads or a dirty commutator. (e) High speed and high current draw indicate shorted fields. Replace the field coil assembly and retest the motor. (4) Disassemble the starter motor, inspect and test components as necessary. d. Disassembly.  Disassemble the starter motor only to the extent necessary to repair or replace defective parts.  Disassemble in accordance with figure 13-4. (1) Note the relative positions of the nose housing (16), lever housing (37), and solenoid switch (36) so that the motor can be reassembled in the same manner. (2) Tag and disconnect the field coil connector from the solenoid M terminal and lead from the ground terminal. (3) Remove four screws and 13-6