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TANKS AND SIMILAR UNITS OVER 100,000 LBS. DODX 140-TON FLAT CARS WITH CHAIN TIE-DOWN ASSEMBLIES - TM-55-2200-001-12_213
MAJOR CALIBRE GUN BARRELS GENERAL INSTRUCTIONS

TM-55-2200-001-12 Modular Causeway System (MCS) Floating Causeway (FC) FC-1 NSN 1945-01-473-2162 Manual
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TM 55-2200 001-12 Change 3 Sec.  6-Fig.  83 TANKS AND SIMILAR UNITS OVER 100,000 POUNDS-DODX 140-TON FLAT CARS WITH CHAIN TIEDOWN ASSEMBLIES Item    No. of Pcs.   Description A Brake wheel clearance, see General Instruction 1. B through D Intentionally not used. E 6 per tank Shackles, heat treated to 170.000 lbs.  minimum breaking strength, 1-1/2 in.  alloy steel, screw- pin anchor shackle (has 1-3/8 in.  pin).  M1 Tank, attach one shackle to each front tow lug and one shackle to the smaller hole in each lifting eye bracket.  At rear of tank, attach one shackle to each tow lug.  M60 tank, attach one shackle to both the upper and lower holes in each front tow lug.  (Lifting eyes are not used.) At rear of tank, attach one shackle to each tow lug. F 1 per tank Link, 300,000 lbs, breaking strength, 1-3/4 in.  alloy steel, 7 in.  inside diameter, Attach to towing pintle at rear of tank. G 2 per tank Wire rope, 3/8-inch, 6x19 IWRC.  Wrap gun tube with protective material in area between rear lifting eyes.  Apply wire rope in two complete loops, one around the gun tube to left rear lifting eye, the other around the gun tube to right rear lifting eye.  Tension the cable only enough to take slack out, and secure each loop with two 3/8-inch cable clips.  (Not required if tank has operable external gun tube brace.) H 24 per tank Single chain tie-down assembly with 1/2 in.  diameter special alloy steel chain, proof tested to 27,500 Ibs.  (13,700 lbs.  working load limit).  Apply chains between vehicle tie-down fittings and  anchor  locations  identified  on  the  deck  of  the  car,  as  shown  in  the  loading  figure  (see chain attachment points). I 1 per tank Saddle block.  Fabricate gun tube rest from 6- x 6-inch lumber, contoured to fit tube, with metal banding over the tube and nailed to block.  Not required when tank has an external travel lock (gun brace) or when gun tube is not installed in normal position on turret. J 2 per tank Wire rope, 3/8-inch, 6x19 IWRC.  If gun tube is not installed in the turret, secure turret to hull with 3/8-inch wire rope to prevent turret rotation and secure each loop with two 3/8-inch cable clips. GENERAL INSTRUCTIONS 1.  The car is equipped with a hand brake lever at lower edge of side sill.  Lading on car deck will not interfere with brake lever operation. 2.  The shackles (item "E") and the link (item "F") are furnished as a part of the chain tie-down system on the railcar. 3.  The loading figure (see chain attachment points) illustrates tie-down arrangements for one or two M1 or M60 tanks, but other tanks and similar tracked vehicles may be loaded.  When loading other such units, the number and location of chain securements may vary from the arrangement shown, depending on the size and weight of the vehicle and location of the tie-down fittings.  The originating carrier must approve the load before shipments are made. 4.  When tanks are loaded facing in the opposite direction from that on the loading figures (see chain attachment points), the  tie-down  pattern  will  remain  as  shown  but  the  numbered  chain  anchor  location  and  channel  letter  would  be transposed as shown in parenthesis "( )". 5.  Vehicle brakes must not be set and transmission shall be in neutral. 6.  Turret gun must be in the aft travel position and secured in a travel lock or with wire rope, item "G" For the M1 tank, the turret gun is lowered into a saddle block, item "I".  Turret rotation and gun elevating controls must be engaged and wire tied.  if feasible, to prevent movement of turret and gun. 7.  The vertical painted stripes on the railcar side sills indicate tank placements.  Yellow for M60 tank(s), white for M1 tank(s).  When two M or M60-series tanks are loaded, the forward left-hand road wheel of tank No.  1 and the rear left- hand road wheel of tank No.  2 are centered over its respective colored stripe.  When one M1 or M60-series tank is loaded, align as shown in relation to the center stripe on the side sill.  The M60 shall be loaded so that the space between the third and fourth left-hand road wheels is centered over the center stripe on the side sill.  Position one M1 tank with its fourth left-hand road wheel centered over the center stripe on the side sill 8.  Tighten turnbuckles of front and rear chain tie-downs  at  the  same  time  to  prevent  uneven  tensioning.    Tighten  each  chain  until  only  1/8-inch  of  rubber  is  visible between the metal rings of the compression unit attached to the turnbuckle.  After tensioning, strike chain with a hammer or  steel  bar  with  enough  force  to  eliminate  any  kinks  in  chain  and  retighten  if  necessary.    Tighten  jam  nut  against turnbuckle torque 15 to 25 foot pounds. 9.  Unused chains must be secured to the deck or stowed in channels.  See General Rules 4, 5, 7, 11, and 15(G) for further details. E-108.4







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