TM 10-3930-671-24 3-31. GENERAL HYDRAULIC PIPING REPLACEMENT. a. Removal.    The  truck  is  equipped  with  rigid  hydraulic  pipe  connections.    The  following  procedures  cover removal and installation of these fittings.  These procedures will apply to all rigid piping installed on truck. WARNING Hydraulic fluid is slippery and can cause personal injury when spilled on a floor or other smooth surface.  Precautions should be taken to avoid any spillage and to clean up any spills when they occur. NOTE • The subparagraphs show a typical connection and fittings on truck. • This  procedure  is  for  reference  only  to  show  piping  replacement  procedures  used  on truck.    It  will  never  be  necessary  to  remove  all  hydraulic  piping  at  one  time.    Individual procedures will indicate the area where is to be removed and installed. • Some hydraulic piping will have straps holding it to a stable frame part to reduce vibration during operation. • Some hydraulic pipe fittings will have a preformed packing.  Preformed packings should be replaced whenever corresponding fitting is removed. • Place suitable container with a 1 gallon (3.8 liters) capacity under any hydraulic pipe that is being disconnected to catch spilling hydraulic fluid. (1) With the forklift turned OFF, operate hydraulic control levers to relieve all pressure from the hydraulic system. (2) Remove floor panel from forklift (Para 3-36). (3) Remove hydraulic pipe fitting (1) and seal (2) from fitting (3). (4) Remove hydraulic pipe fitting (4) and seal (5) from hose (6). 3-88