TM  10-3930-638-24&P 2-56.      HYDRAULLIC   LIFT   SYSTEM   MAINTENANCE   (cont) d. Lift Chains and Pulleys(cont). STEP LOCATION ITEM ACTION REMARKS adjustment 16 Mast  assembly a. Lift chains Depress  in  middle  Chain  deflects  1/2  inch  approximately b. Lift chain nut Tighten or loosen as required to obtain 1/2 inch deflection when chain is depressed in middle. 2-410  Change  2