TM  10-3930-638-24&P 2-21.   STARTING   SYSTEM   TROUBLESHOOTING   (cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 1. STARTER CRANKS TOO SLOWLY (cont) Step 2. Remove starter assembly from engine (para 2-27a). Connect  no-load  test  setup  to  starter  as illustrated, and adjust carbon pile for 20 Vdc indication  on  voltmeter. a. If ammeter indicates 52 to 90 amperes and rpm indicator indicates 8000 to 13,000 rpm, discon- nect  starter  from  test setup and reinstall on  engine  (para 2-27a). 2. b. If ammeter does not indicate 52 to 90 amperes, or rpm indicator does not indicate 8000 to 13,000  rpm,  record  voltage,  current  and  rpm,  and  replace  starter  assembly  (para  2-27a). Forward test results to direct support maintenance with defective starter. STARTER  FAILS  TO  CRANK Step 1. Connect  voltmeter  leads  to  S  terminal  of  starter solenoid and ground. Note  voltmeter  indication  while  an  assistant depresses START switch. a. If voltmeter indicates 24 Vdc, replace starter  assembly  para  2-27a). b. If voltmeter indicates less than 24 Vdc, or zero, proceed to step 2. 2-101