TM-9-2815-205-24P Parts Manual for M113 Engine 6V53 6V53T Download
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Source Code Application/Explanation AF-Assembled by field Items with these codes are not to be requested/requisitioned individually. The parts that make up the assembled item must be requisitioned or fabricated and assembled at the level of maintenance indicated by the source code. If the third position of the SMR code authorizes you to replace the item, but the source code indicates the item is assembled at a higher level, order the item from the higher level of maintenance. AH-Assembled by below depot sustainment level AL-Assembled by SRA AD-Assembled by depot AG-Navy only XA Do not requisition an "XA" coded item. Order the next higher assembly. (Refer to NOTE below.) XB If an item is not available from salvage, order it using the CAGEC and part number. XC Installation drawings, diagrams, instruction sheets, field service drawings; identified by manufacturer's part number. XD Item is not stocked. Order an XD-coded item through local purchase or normal supply channels using the CAGEC and part number given, if no NSN is available. NOTE Cannibalization or controlled exchange, when authorized, may be used as a source of supply for items with the above source codes except for those items source coded "XA" or those aircraft support items restricted by requirements of AR 750-1. Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to use and repair support items. The maintenance codes are entered in the third and fourth positions of the SMR code as follows: Third Position. The maintenance code entered in the third position tells you the lowest maintenance level authorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to the following levels of maintenance: Maintenance Code Application/Explanation F - Field maintenance can remove, replace, and use the item. H - Below Depot Sustainment maintenance can remove, replace, and use the item. TM 9-2815-205-24P 0001 0001-3