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TM 9-2320-285-24-1
2-8.
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ENGINE HARD TO START OR WILL NOT START (Cont)
Step 8.
Disconnect battery ground cable (para 2-34a). Place an ammeter in series with battery positive cable:
disconnect battery positive cable from starter terminal (para 2-25b) and connect battery positive cable to
ammeter; then run a test cable from ammeter to starter terminal. Reconnect battery ground cable (para
2-34a). Turn key switch to start position while watching ammeter. Ammeter shall indicate 120 to 150
amperes.
a. If ammeter indicates more than 150 amperes, repair or replace starter (para 2-25b).
b. If ammeter indicates less than 120 amperes, go to step 9 below.
c. If ammeter indicates 120 to 150 amperes, go to step 10 below.
Step 9.
Check specific gravity of battery electrolyte (para 2-34a).
a. If specific gravity is low, charge batteries.
b. If specific gravity of one cell differs excessively from specific gravity of another cell in same battery,
replace battery (para 2-34a).
c. If specific gravity is correct, replace battery cables (para 2-34a).
Step 10. Check engine cranking speed.
a. If cranking speed seems low, troubleshoot electrical system (para 2-18).
b. If cranking speed does not seem low, notify direct support maintenance (refer to TM 9-2815-205-34
for detailed troubleshooting of the engine and its components).
2.
ENGINE STARTS BUT WILL NOT RUN
Step 1.
Check if air cleaner restriction indicator red band is in view.
a.
If red band is in view, go to step 2 below.
b.
If red band is not in view, go to step 4 below.
2-20

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