TM  10-3930-638-24&P 3-31.   MAST   ASSEMBLY   MAINTENANCE   (cont) c. Inner and Outer Mast (cont). i.  Chain  hoist j. Inner mast (3) STEP LOCATION ITEM ACTION REMARKS INSTALLATION/REPLACEMENT   (cont) WARNING Be sure chain hoist is securely fastened to inner mast before per- forming the following step. Failure to do so could cause serious bodily  injury. h. Inner mast (3) Install Position so that roller bearings are in line with cut-outs in side of outer mast. Lift top of inner mast to slip roller bearings into channel of outer mast while lower- ing inner mast. Push inner mast into outer mast half way Remove Position com- pletely  in outer mast 13 Outer mast, Two lock washers (2) Install sides and stop bolts (1) 14 Mast a. Lift cylinder Install assembly b. Lift chains and Install pulleys c. Hose and tube Install assemblies d. Side shifter Install frame and rota- tion  bearing Para 3-30e Para 2-56d Para 2-56f(2) Para 3-31b 3-263 (3-264 blank)