TM  10-3930-638-24&P 2-56.   HYDRAULIC   LIFT   SYSTEM   MAINTENANCE   (cont) d. Lift #rains and Pulleys (cont). STEP LOCATION ITEM ACTION REMARKS INSPECTION  (cont) 10 Lift chains (21) Inspect Replace chain if any link is broken or cracked. Replace chain bolt if threads damaged; replace pin if cracked or bent. See  illustration  for  replacement  of  these parts INSTALLATION/REPLACEMENT 11 Carriage  bearing a. Two lift chains (21) Soak chain in plate, top SAE 10 motor oil.  Position, install chain bolt   in   car- riage  bracket supports b. Two lift chain nuts (20) Install 12 Chain pulley (18) Bearing (19) Install; press into Use  2-7/32  inch  diameter  sleeve chain pulley hub until  centered 13 Hose pulley (11) Bushing (12) Install; press into Use  13/16  inch  diameter  sleeve hose  pulley  hub until  centered 2-408