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NEWS | Dec. 16, 2022

M109A7 Paladin/M992A3 CAT: Inspect Transmission Oil Hose for Chafing

BLUF: Inspect M109A7 Paladin and M992A3 CAT transmission oil hose (outlet) for signs of chafing the next time the powerpack is pulled.
 
Soldiers with the 1st Cavalry Division (3-1 ABCT) conduct an emergency call for fire drill
Photo by Sgt. Gavin Ching
 
M109A7 Paladin and M992A3 CAT maintainers, inspect the transmission oil hose (outlet), NSN 4720-01-662-3681, for chafing (caused when two objects rub together abrasively) where the hose passes over the stiffener (cross support) and torsion bar.
 
Inspect transmission oil hose (outlet) for signs of chafing
Inspect transmission oil hose (outlet) for signs of chafing

The inspection should be done the next time the powerpack is removed for scheduled or unscheduled services.

Replace chafed hose
Replace chafed hose

The transmission oil hose (outlet) is currently protected by a single hose guard, NSN 4720-01-530-4113. New TACOM guidance requires the installation of an additional two (2) guards after completing the inspection, even if there are no signs of chafing. Secure each hose guard with three (3) line supporting straps, NSN 5975-00-899-4606.

Install two more hose guards (click on image to view full-sized PDF version)
Install two more hose guards (click on image to view full-sized PDF)

Installing the additional hose guards is an interim repair until a more permanent solution is found.
 
For more information, check out TACOM Maintenance Action Message 23-005 HERE.
 
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