TM 9-2320-209-34-2-2 c. Cleaning. There are no special cleaning procedures needed. Refer to cleaning procedures given in Part 1, para 1-3. d. Inspection and Repair. WARNING Do not heat derrick tube (1) when straightening it. This could make it weak. When setting poles, a weak tube would be dangerous to personnel and equipment. 1. Check that derrick tube (1) has no bends, cracks or flat areas. If tube is bent, straighten it. If it is badly bent of cracked, throw it away and get a new one. END OF TASK 17-712