TM 5-3805-262-203-7. COOLING SYSTEM TROUBLESHOOTING MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. ENGINE OVERHEATS.Step 1.With engine at normal operating speed for two minutes and returnUnlock and open radiator capaccess panel.Carefully cover radiator capwith a cloth and rotate coun -t e r c l o c k w i s e t o f i r s t d e t e n t.A hissing noise from cap andfiller neck should be heardindicating that system isp r e s s u r i z e d.a. If hissing sound is notheard, go to MALFUNCTION 3(page 3-58).b. If hissing sound is heard,r e i n s t a l l r a d i a t o r c a p,shut off engine, and go tostep 2 below.Step 2.Remove engine side panels(page 9-14).Check alternator drive beltsfor proper tension. Presseach belt midway between fanpulley and crankshaft pul-ley. Belts should deflectapproximately 1/2 inch.temperature, run engine at highto idle speed.a . I f b e l t s d o n o t d e f l e ct1/2 inch approximately,adjust (page 5-5) .b . I f e a c h b e l t d e f l e c t s 1 /2inch approximately, go tostep 3 below.3-53
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