TM 9-2320-361-34 MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Table 2-1. Mechanical Troubleshooting (Contd). 57. 58. 59. 60. WATER WILL NOT GRAVITY DRAIN FROM SELECTED COMPARTMENTS Complete troubleshooting malfunction 56, step 2. END OF TESTING! WATER TANK COMPARTMENTS CANNOT BE SUCTION FILLED Complete troubleshooting malfunction 56, steps 1 and 3. END OF TESTING! EARTH BORING AND POLESElllNG EARTH BORING MACHINE DRIVE INOPERATIVE Step 1. Step 2. Step 3. WARNING (M764) Eye protection is required when inspecting internal clutch case operation on vehicle. Failure to do this may result in fluid contacting eyes and injury to personnel. Check clutch case internal drive hubs. Remove top plug from clutch case housing. Operate earth boring machine with drive engaged and feed in neutral (TM9-2320-361-10). Looking through plug hole, observe drive hubs for rotation. a. If rotation of drive hubs is evident, check and replace idler gears (para. 15-43). b. If no rotation of drive hubs is evident, repair or replace clutch case assembly (para. 15-44). Check intermediate case drive gears. Operate earth boring machine power leveler (TM9-2320-361-10). If power leveler will not operate, replace or repair intermediate gear assembly (para. 15-42). Check boring case. Remove inspection cover of boring case. Manually rotate rack bar clockwise and observe boring case gears operation. If rack bar will not turn, replace or repair boring case (para. 15-38). END OF TESTING! EARTH BORING MACHINE FEED INOPERATIVE WARNING Eye protection is required when inspecting clutch case operation on vehicle. Failure to do this may result in injury to personnel. NOTE Earth boring machine auger feed cannot be moved up or down manually without vehicle power to aid operation. Step 1. Check clutch case internal feed hubs. Remove top breather and adapter from clutch case housing. Operate earth boring machine with feed engaged and drive in neutral (TM9-2320-361-10). a. If rotation of feed hubs is evident, replace or repair clutch case assembly (para. 15-44). b. If no rotation of feed hubs is evident, check and replace defective idler gears (para. 15-43). 2-27