TM 9-2350-277-20-1ENGINE OVERCOOLS—Continued 0015 00Y1. Stop engine (see your -10).2. Disengage THERMOSTATIC FAN SPEED switch (see your -10).3. Manually rotate fan drive belt (1).4. Do fan drive belt and all related pulleys rotate freely?YESNOYN1. Replace variable speed fan drive unit(WP 0249 00).2. Verify no faults found.2Y1. Replace engine thermostat (WP 0237 00).2. Verify no faults found.0015 00-2
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