Parts TM

Every parts TM is organized the same way, which helps make the manuals easy to use. Mechanics must know how to use the TM. This section explains how to find a part NIIN in a parts TM.

Parts TMs are divided into five main sections.

1. The table of contents provides a quick way to locate parts, which are listed by groups.

2. The introduction explains how to use the TM and all of the codes used in the TM.

3. The repair parts list section lists all the repair parts that can be ordered.

4. The special tools section lists the tools that are unique to this model of equipment.

5. The cross-references are used to locate the part in the TM or, once the part has been located in the TM, to locate the NIIN for a part.

The mechanic's first step in locating the repair part is to find the functional group in the parts list in the table of contents. The first part required on DA Form 5988-E is the engine temperature gage transmitter. The engine temperature gage is an electrical component and is part of the engine sending units and warning switches section in the parts manual. The mechanic sees that the sending units (transmitters) are on page 92-1, illustration 92.

Now the mechanic must locate the part item number. The engine temperature gage is item 1. Notice the corresponding data for the transmitter gives six separate bits of information. This information is critical, and the mechanic must understand it to properly identify the repair part.

(1) ITEM NO. This refers to the part item number in its corresponding illustration. This information helps in going from illustration to the text and vice versa.

(2) SMR CODE. The Source Maintenance and Recoverability (SMR) code is a five-position code that tells who can remove and install the part, who can repair or rebuild it, and if the part is recoverable. The SMR code is critical. The code is explained in the TM introduction.

Here is an explanation of the SMR code to show you what it means.

(3) CAGEC. The Commercial and Government Entity Code (CAGEC) is a five-digit code that identifies the manufacturer, distributor, or government agency that supplies the item.

(4) PART NUMBER. This is a number assigned by the manufacturer or agency that controls the part design. When an NIIN is not available for a part, this number may be used.

(5) DESCRIPTION AND USABLE ON CODE (UOC). This is the part name and a code (UOC) that specifies which models the part is designed to fit. For example, D2 is an M113A2 and the TM introduction lists the UOC for an M113A2 as V35. Notice that V35 is included in the UOC for this part. The UOC must include the M113A2 or the part will not work.

(6) QTY. The quantity gives the total number of that item used in that functional group. Do not confuse this entry with the unit of issue; these are two different items. The quantity for the transmitter is one. This means that there is only one transmitter on this type of engine. However, if this were a track shoe, this quantity would be 63 left and 64 right. This means you would need 127 track shoes to replace all the shoes.

Remember, the mechanic is looking for the NIIN. The parts list does not include the NIIN, but it does include the part number. The mechanic uses the part number to find the NIIN in the index at the back of the parts TM.

This index is listed in alphanumerical sequence. The mechanic uses the part number for the transmitter, MS24537-1, from the parts list to find the NIIN in the index. The National Stock Number (NSN) is the complete 13-digit stock number; the NIIN is the last 9 digits of the NSN. The NIIN for the transmitter is 00-814-5271. All of the repair part files in ULLS-G use the NIIN as the reference number. The ULLS clerk uses the NIIN to order the part.

Now the mechanic must enter the part's data in the CORRECTIVE ACTION column of DA Form 5988-E as shown here. The same process is followed for the headlight switch and the seat cushion. The mechanic must now return this information to the maintenance supervisor before the ULLS clerk requests the parts.

The maintenance supervisor checks the mechanic's work as time permits. NMC equipment faults must always be checked to ensure that the fault is in fact an NMC fault and that the requested part will restore the equipment to a mission capable status. The maintenance supervisor signs in the SIGNATURE block when the mechanic's work is satisfactory. This is not a regulatory requirement. You must specify this in your SOP. By having the supervisor sign the form, you maintain some control over Class IX requests and the deadline file. The form then goes to the ULLS clerk, who enters the faults into the database and requests the parts. Then the form will be updated and returned to the maintenance supervisor.