g1. DRIVE SHAFT OR UNIVERSAL JOINT UNUSUALLY NOISY WHEN OPERATING TM 9-2320-365-20-2 2-1598          Change 1 INITIAL SETUP   Equipment Conditions     Engine shut down (TM 9-2320-365-10). Tools and Special Tools   Tool Kit, Genl Mech (Item 44, Appendix C)   Goggles, Industrial (Item 15, Appendix C) 1.            TEST OPTIONS            Visual inspection     REASON FOR QUESTION     YES START WARNING Read WARNING on following page.            TEST OPTIONS            Visual inspection     REASON FOR QUESTION     2. NO             KNOWN INFO              Drive shaft may operate unusually noisy if not secure. Are universal joint(s) bearing cap screws secure? Drive shaft properly lubricated.        POSSIBLE PROBLEMS        Loose universal joint(s) bearing cap screws. Worn universal joints. Faulty drive shaft. Replace universal joint(s) bearing cap screws (para 9-2). YES Drive shaft may operate unusually noisy if not properly lubricated.             KNOWN INFO              Nothing.        POSSIBLE PROBLEMS        Drive shaft requires lubrication. Loose universal joint(s) bearing cap screws. Worn universal joints. Faulty drive shaft. NO Is drive shaft properly lubricated? Lubricate drive shaft (Appendix H).