TB-43-0001-62-03-1-EXTRACT

TB-43-0001-62-03-1-EXTRACT - Page 3 of 5

TB 43-0001-62-03-1

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Ground Precautionary Messages (GPM) (cont)

(1) To assist in determining correct or incorrect air connections, artwork illustrating both may be found at the Army

Electronic Product Support (AEPS) website under "Ground Precautionary Messages." See note below for specific

directions within AEPS.

NOTE

Access Army Electronic Product Support at https://aeps2.ria.army.mil

for artwork. Once AEPS is accessed, go to the

"Safety First" tab. Click on the "Ground Precautionary Message" drop down menu. Select "All GPMs" on this site, and

scroll to GPM 03-007. "M939 anti-lock brake system modification work order plumbing error and fix" will be clearly

listed. Accessing the AEPS publication of this GPM includes access to the needed artwork.

(2) If AEPS access is not available, artwork can also be obtained by contacting the nearest TACOM logistics assistance

office or by contacting TACOM, AMSTA-LC-CHM, at DSN 786-6395.

Proper plumbing. Correctly or incorrectly installed air lines are easily identified. First, locate the 6-foot cross-chassis

hose connected to the double-check valve # 7 at the location of the spring brake air reservoir on the vehicle's left side. If

correctly installed, that 6-foot hose will be connected to the lower secondary air tank tee. If improperly installed, the same hose

will be connected to the upper primary air tank. In addition, the truck's original "red" tube, when correctly installed for ABS, is

connected on one end to the upper primary air tank as shown in the AEPS artwork (opposite end should already be connected

to ABS' new front relay valve w/ECU).

NOTE

The two crossed air lines readily stand-out in the AEPS artwork as "A" for the "hose to double-check valve # 7" and

"B" for "existing red tube". Artwork illustrates how "A" was incorrectly connected to the primary air tank and how "B"

was incorrectly connected to the secondary air tank. Correct installation for both "A" and "B" are also presented.

Kits. The kits supporting this GPM provide all parts needed for a repair of the plumbing error. These parts have been

assembled into a kit, part number WKT1011 (CAGEC: OUKB6). Kit consists of two elbow fittings, three inserts, three sleeves,

and the 6-foot length of air hose for use in connecting the double check valve # 7 with the secondary air tank if needed. In many

instances, the 6-foot length of air hose will not have been shortened and can be re-installed to the secondary air tank without

the need for any inserts, sleeves, or hose replacements.

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