TM 9-2320-289-20 Item No. 29 30 31 2-22 Table 2-1. Unit Level Preventive Maintenance Checks And Services for CUCV Interval Semi- Annual Semi- Annual Semi- Annual Change 3 Item To Be Inspected Fuel  Sys- tem Suspen- sion Body, Frame, and Cross- members Procedure a. Inspect fuel tank for leaks. Inspect all attaching  hoses  for  wear,  cracks,  and splits. b. Inspect all fuel lines for leaks, loose connections,  and  crimps. Inspect spring “U” bolts for mounting se- curity. Tighten loose “U” bolt nuts to 40 ft-lb (54 N.m) in an “X” pattern. Tighten again in same pattern to 150 ft-lb (203 N.m) for front springs and to 145 ft-lbs for rear springs. a. Inspect body, frame, and crossmem- bers  for  rust-through,  discolored  sur- face, blistered paint, surface separation, or  other  evidence  of  corrosion  damage. If any corrosion damage exists, prepare corroded surfaces IAW TM 9-247, and treat  surface  IAW  TB  43-0213. b.  Inspect  truck’s  main  frame  rails  for cracks, breaks, and bends. c.  Inspect  crossmembers  for  breaks, bends,  and  loose  or  missing  rivets  or bolts d.  Inspect  body  mounts  and  wheel housings for security and damage. e.  For  M1009  with  additional  engine mounting holes, inspect for cracks at ad- ditional  engine  mounting  holes. f. For all except M1009, inspect cargo body  mounting  bolts  for  looseness.  If loose, tighten to 50 ft-lbs (68 N.m). Not Mission Capable  If: a.  Any  Class  Ill  fuel leak. b.  Any  Class  Ill  fuel leak. b.  Cracks, bends, breaks in frame. c. Any loose or miss- ing  fasteners.