TM 10-3930-669-20 VISUAL INSPECTION (1) Remove cab and engine cowling (Para 15- 2). (2) Inspect cylinder head fins and outlet frame for dirt and debris. (a) If cylinder head fins and/or outlet frame are dirty, clean cylinder heads and/or air outlet frame. (b) If cylinder head fins and/or air outlet frame are not dirty, go to Step 7 of this Fault. (3) Install engine cowling and cab. VISUAL INSPECTION (1) Inspect oil cooler fins for dirt and debris. (a) If oil cooler fins are dirty, clean oil cooler. (b) If oil cooler fins are not dirty, replace oil cooler (Para 3-7). (2) Install engine cowling and cab (Para 15-2). 2-89

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