TM 9-2350-311-20-1
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Turn off MASTER power switch.
Remove calibrated orifice from hose (6) and return to tester case.
Connect hose (6) to driver's heater.
Remove airflow cap (5) and corm- hose (3) to air purifier manifold (4).
Remove two airflow caps (5) having holes and install two solid airflow caps on remaining two manifold (4)
openings.
Install spring clip (1).
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