REPAIR PARTS INTRODUCTION

TM 9-2815-225-34&P · Work Package 0056 00

SCOPE

The repair parts information in this Technical Manual (TM) consists of this Introduction Work Package (WP) and a separate WP containing the engine repair parts list. The introductory material provides the information needed to interpret and understand the repair parts lists. Each column used in the repair parts list is identified and its purpose explained. All codes are listed and their meaning is defined. This introductory material should be read before proceeding to the Repair Parts WP. The Repair Parts WP lists and authorizes parts required for TM overhaul of the Cummins NTC-400 diesel engine. It authorizes the requisitioning, issue, and disposition of repair parts as indicated by the Source, Maintenance, and Recoverability (SMR) codes.

EXPLANATION OF COLUMNS IN THE REPAIR PARTS LIST

Item No. (Column 1). Indicates the number used to identify items called out in the illustration. SMR Code (Column 2). A 5-position code containing supply/requisitioning information, maintenance category authorization criteria, and disposition instruction, as shown in the following breakout:

    Source                                  Maintenance                           Recoverability
     Code                                      Code                                   Code
              1st two
      XX      positions                            XX                                    X    5th position

How you get an item                3rd position           4th position               Who determines
                                                                                     disposition
                                                                                     action on an
                             Who can install, replace     Who can do complete        unserviceable item

or use the item repair* on the item

*Complete Repair: Maintenance capacity, capability, and authority to perform all corrective maintenance tasks of the repair function in a use/user environment in order to restore serviceability to a failed item.

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Source Code. The source code tells you how to get an item needed for maintenance, repair, or overhaul of an end item/equipment. Explanations of source codes follows. Code Explanation PA Stocked items; use the applicable NSN to request/requisition PB items with these source codes. They are authorized to the PC** category indicated by the code entered in the third position of PD the SMR code. PE ** NOTE: Items coded PC are subject to deterioration. PF PG Items with these codes are not to be requested/requisitioned KD individually. They are part of a kit which is authorized to the KF maintenance category indicated in the third position of the SMR code. The complete kit must be requisitioned and applied. KB Items with these codes are not to be requested/requisitioned individually. They must be made from bulk material which is MO- (Made at Unit Level) identified by the part number in the DESCRIPTION AND MF- (Made at DS Level) USABLE ON CODE (UOC) column and listed in the bulk MH- (Made at Specialized material group of the repair parts list. If the item is authorized Repair Act (SRA)) to you by the third position code of the SMR code, but the source MD- (Made at Depot) code indicates it is made at a higher level, order the item from the higher level of maintenance. Items with these codes are not to be requested/requisitioned individually. The parts that make up the assembled item must

AO-    (Assembled by Unit Level)     be requisitioned or fabricated and assembled at the level of
AF-    (Assembled by DS Level)       maintenance indicated by the source code. If the third position
AH-    (Assembled by GS Level)       code of the SMR code authorized you to replace the item, but the
AL-    (Assembled by SRA)            source code indicates the item is assembled at a higher level,
AD-    (Assembled by Depot)          order the item from the higher level of maintenance.

XA- Do not requisition an XA-coded item. Order the next higher assembly. (Also, refer to the note below.) XB- If an XB item is not available from salvage, order it using the Commercial and Government Entity Code (CAGEC) and Part Number (P/N) given. XC- Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer’s part number. XD- Item is not stocked. Order an XD-coded item through normal supply channels using the CAGEC and part number given, if no National Stock Number (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 source code XA.

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 one of the following levels of maintenance. Code Application/Explanation C – Crew or operator maintenance done within organizational maintenance. O – Unit level can remove, replace, and use the item. F – Direct support level can remove, replace, and use the item. H – General support level can remove, replace, and use the item. L – Specialized repair activity can remove, replace, and use the item. D – Depot level can remove, replace, and use the item.

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• Fourth Position. The maintenance code entered in the fourth position tells you whether or not the item is to be repaired and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all authorized repair functions).

NOTE Some limited repair may be done on the item at a lower level of maintenance, if authorized by the Maintenance Allocation Chart (MAC) and SMR codes. This position will contain one of the following maintenance codes. Code Application/Explanation O – Unit is the lowest level that can do complete repair of the item. F – Direct support is the lowest level that can do complete repair of the item. H – General support is the lowest level that can do complete repair of the item. L – Specialized repair activity (designate the specialized repair activity) is the lowest level that can do complete repair of the item. D – Depot is the lowest level that can do complete repair of the item. Z – Nonrepairable. No repair is authorized. B – No repair is authorized. (No parts or special tools are authorized for the maintenance of a B-coded item.) However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.

Recoverability Code. Recoverability codes are assigned to items to indicate the disposition action on unserviceable items. The recoverability code is entered in the fifth position of the SMR code as follows: Recoverability Code Application/Explanation Z – Nonrepairable item. When unserviceable, condemn and dispose of the item at the level of maintenance shown in third position of SMR code. O – Reparable item. When uneconomically reparable, condemn and dispose of the item at unit level. F – Reparable item. When uneconomically reparable, condemn and dispose of the item at the direct support level. H – Reparable item. When uneconomically reparable, condemn and dispose of the item at the general support level. D – Reparable item. When beyond lower level repair capability, return to depot. Condemnation and disposal of item not authorized below depot level. L – Reparable item. Condemnation and disposal not authorized below specialized repair activity (SRA). A – Item requires special handling or condemnation procedures because of specific reasons (e.g., precious metal content, high dollar value, critical material, or hazardous material). Refer to appropriate manuals/directives for specific instructions.

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NSN (Column 3). The NSN for the item is listed in this column. CAGEC (Column 4). A 5-digit numeric code used to identify the manufacturer, distributor, or Government agency/activity, that supplies the item. Part Number (Column 5). Indicates the primary number used by the manufacturer (individual, company, firm, corporation, or Government activity), which controls the design and characteristics of the item by means of its engineering drawings, specifications standards, and inspection requirements to identify an item or range of items. Part numbers not available (N/A) will be provided as updates to this manual when available.

NOTE When you use an NSN to requisition an item, the item you receive may have a different part number from the part ordered.

Description and Usable On Code (UOC) (Column 6). This column includes the following information: 1 The Federal item name and, when required, a minimum description to identify the item. 2 Items that are included in kits and sets are listed below the name of the kit or set. 3 Spare/repair parts that make up an assembled item are indented and listed immediately following the assembled item line entry. 4 Part numbers for bulk materials are referenced in this column in the line item entry for the item to be manufactured/fabricated. 5 When the item is not used with all serial numbers of the same model, the effective serial numbers are shown on the last line(s) of the description (before UOC). 6 The statement END OF FIGURE appears just below the last item description in column 6 for a given figure in both the repair parts list and special tools list work packages. QTY (Column 7). The QTY (quantity per figure column) indicates the quantity of the item used in the breakout shown on the illustration figure, which is prepared for a functional group, subfunctional group, or an assembly. The letter V appearing in this column in lieu of a quantity indicates that the quantity is variable and the quantity may change from application to application.

HOW TO LOCATE REPAIR PARTS

When NSN or P/N is not known: First. Determine the assembly or subassembly to which the item belongs. Second. Find the figure covering the assembly or subassembly to which the item belongs. Third. Identify the item on the figure and use the Figure and Item Number Index to find the NSN. Fourth. Look in the repair parts list work package for the figure and item numbers. The NSNs and part numbers are on the same line as the associated item numbers.

END OF WORK PACKAGE

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