TM 9-2350-261-20-l1. Allow system to remain pressurized for 5 minutes.2. Does pressure drop less than 1 psi?1. Internal coolant system2. Notify your supervisor.1 . H a s t h e r m o s t a t b e e n r e p l a c e d?1. Replace thermostat(page 8-15).YES2. Verify no faults found.1. Replace coolant pump (page 8-11).2. Verify no faults found.1. Stop engine (see your -10).2. Remove ventilating fan drive belt (page 8-35).3. Manually rotate ventilating fan drive shaftpulley (1).4. Does fan spin freely? 1. Faulty transfer gear case.2. Notify your supervisor.1. Fan does not spin.2. Notify your supervisor.3 - 1 3
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