TM 5-3820-256-10 Table 2-23.  Waterbed Preventive Maintenance Checks and Services ITEM INTERVAL Item to be Procedures Equipment is NO. Inspected Check for and have repaired not ready/ B  D  A  W  M or adjusted as necessary. available if: I X Water Check water level.  Add water as needed. 2 X Storage tank Visually inspect for leaks or cracks Waterbed is leak- in waterbed seams. ing excessively. 3 X Water drain valve Check for sticking or binding. Valve cannot be operated. 4 X Water gage Check for proper register/broken face plate glass. 5 X Crane boom stand vent Check for obstruction prior to filling. Vent is plugged or obstructed. 6 X Rear 3/4" ball valve vent Open prior to filling waterbed. Vent is closed. 7       X Fill cap Reinstall cap after filling. 8 X Steps/handrails Check for bent or broken steps or handrails. 9 X Tool boxes and vertical Check for damaged hinges or latches. cabinets. 10 X Vise Check for broken or damaged chain Chain or screw is and tightening screw. broken. 11 X Workbench Check for binding and/or damaged Workbench binds or locking latch. latch is damaged. 2-38