TM 9-2320-209-20-3-1 FRAME 2 I 1. Run engine for 25 minutes. 2. Stop engine. Refer to TM 9-2320-209-10. WARNING Do not take off filler cap (1) before pressure has been let out. Pressure will blow out scalding fluid and vapor. Personnel can be badly burned. 3. Put heavy cloth over radiator filler cap (1). Press down and turn filler cap slowly to the left to the first stop. Let all pressure out of cooling system. 4. Press down and turn filler cap (1) all the way to the left and lift it off. GO TO FRAME 3 TA 083305 6-52