TM 10-4320-344-24Table 2-4. Unit Troubleshooting Table. (Continued).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION9. ENGINE OVERHEATS. (Models 609-C and US636HCCD-1)Step 1.Inspect for blockage of cooling air to cooling fan.Clean and clear blockage as required.Step 2 .Inspect for broken, missing, or loose V-belts.Tighten V-belts (paragraph 2.21.12).Replace V-belts (paragraph 2.21.12).Step 3.Inspect for broken or damaged cooling air blower.Replace cooling air blower (paragraph 2.21.39).Step 4.Change oil and oil filter.a .Refer to LO 10-4320-344-12 to change oil and filter.b .Notify direct support maintenance.2-36a .b .
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