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Figure 3-6.  Beveling Before Weld
J-bar Repair

TM-55-8115-203-23P Container General Cargo: MILVAN Container W/Mechanical Load Bracing System; MILVAN Manual
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TM 55-8115-203-23 & P b. Corner  post  replacement.    Replace  the  corner  post  if  repair  by  straightening  or  inserting  is  not  possible.    The replacement  corner  post  should  be  identical  in  shape  and  length.    It  should  be  made  of  rolled  steel  with  a minimum tensile strength of 110 lbs/sq.  in.  (50 kg/sq. mm.), at least 1/4 in.  (6 mm) thick. (1) Remove or shield parts from corner post to be replaced:  (a) For front corner posts: 1 Remove or shield floorboards which could be damaged by welding heat. 2 Cut J-bar away from the corner post and corner fitting with oxygen-acetylene torch.  Remove door according to paragraph 2-7.  Avoid damaging J-bar or hinges with torch. (b)    For rear corner posts: 1 Remove both plywood liners following procedure 2-9. 2 Remove or shield floorboards which could be damaged by welding heat. CAUTION Direct oxygen-acetylene torch away from corner fittings, side and end rails, and side and end panels to prevent damage to any of these parts. (2) Use oxygen acetylene torch to cut out damaged post from rest of container. (3) Remove corner post from container. (4) Grind smooth all cut edges on container and J-bars. (5) Grind forty-five degree bevel on upper and lower edges of the replacement corner post.  This will allow full weld penetration at corner post joint. (6) Tack weld corner post in position. (7) Check standard measurements for proper alignment (see Figure 3-1).  Reposition corner post if necessary. (8) Continuously   weld   new   corner   post   to   adjoining   structural   parts   of   container.      Make   adjustments   as necessary to maintain allowable tolerances shown in figure 3-1. (9) Replacement of parts after front corner post replacement only: 3-14







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