TM  10-3930-638-24&P 3-31.   MAST   ASSEMBLY   MAINTENANCE   (cont) b. Side Shifter Frame and Rotation Bearing (cont), STEP LOCATION ITEM ACTION REMARKS INSTALLATION/REPLACEMENT   (cont) (cont) 15 16 c. d. e. f. Mast   assembly   a. b. c. 20 cap screws (8), Install washers  (10)  and nuts (9) Chain hoist Remove From  side  shifter  frame Sideshift  cylinder Install Para 3-30c assembly Two  sideshift  chains Install Para 2-56e and pulleys Rotation  cylinder Install Para  3-30d assembly Carriage   assembly Install Para 3-31a, step 11 Chain hoist Attach To top of inner mast WARNING Be sure chain hoist is securely fastened to top of inner mast before performing the following step. Failure to do so may cause serious bodily  injury. d.  Mast  assembly Position;  align In front of vehicle mounting holes Mast  assembly, a. Two washers (6) Install sides NOTE Use chassis grease to hold washers (6) in position if necessary. d. c. d. e. f. Two lower pivot mast Install pins (5) Two washers (4) Install Two nuts (3) Install Two lubrication Install fittings (7) Tilt  cylinder  assem- Position eye on blies rod end between brackets on outer mast  sides 3-257