TM 9-2320-361-20 Table 2-2. Mechanical Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 3. Step 4. Check hoist cylinder hoses for restrictions. If hydraulic hoses are restricted, notify your supervisor. Check control valve lever travel and adjustment. a. If control valve lever travel and adjustment is incorrect, notify your supervisor. b. If control valve shaft will not operate when control box is operated, notify your supervisor. END OF TESTING! 66. HYDRAULIC PUMP NOISY Check oil level in reservoir (LO 9-2320-209-12-1). a. If fluid level is low, fill to proper level (LO 9-2320-209-12-1). b. If hydraulic pump is still noisy, notify your supervisor. END OF TESTING! 67. TAlLGATE DOES NOT OPEN Check for bent or broken linkage. If linkage is bent or broken, notify your supervisor. END OF TESTING! EARTH BORING AND POLESETTING 68. EARTH BORING MACHINE WILL NOT OPERATE (M764) Step 1. Check power divider control linkage for bends, breaks, or improper adjustment. If power divider controls are bent, broken, or out of adjustment, refer to para. 13-23. Step 2. Check power divider and earth boring propeller shafts and universal joints for breaks. If propeller shafts or universal joints are broken, refer to para. 13-21. END OF TESTING! 69. EARTH BORING MACHINE CANNOT BE MOVED VERTICALLY Check vertical drivechains for breaks or improper adjustment. a. If vertical drivechains are broken, refer to para. 12-84. b. If vertical drivechains are out of adjustment, notify your supervisor. END OF TESTING! 70. EARTH BORING MACHINE CANNOT BE MOVED HORIZONTALLY Check horizontal drivechains for breaks or improper adjustment. a. If horizontal drivechains are broken, refer to para. 12-83. b. If horizontal drivechains are out of adjustment, notify your supervisor. END OF TESTING! 2-46