NEWS | March 4, 2021

M1231 HUSKY: CTIS Pressure Settings


Operators and mechanics,

If MWO 9-2355-316-50-7 was applied to your unit’s M1231 HUSKY, make sure the central tire inflation system’s (CTIS’s) “ROAD” pressure setting is only used with the Michelin wheel assembly, NSN 2530-01-680-8939.
          
Don’t use Continental’s road wheel assembly, NSN 2530-01-578-8932, or Continental’s overpass wheel assembly, NSN 2530-01-567-7853. 
        
The MWO results in changes to the tire pressure settings, the CTIS control box placard and the tire placard.
 
Pressure settings are as follows: 
 
  1. Continental overpass wheel assembly, NSN 2530-01-567-7853; use “overpass” mode (CTIS settings: 12, 15, 29 psi, depending on the mission).
  2. Continental road tire, NSN 2530-01-578-7853; use “overpass” mode at the “on-road” setting (CTIS setting: 29 psi)
  3. Michelin road tire, NSN 2530-01-680-8939; use “road” mode (CTIS settings: 50, 50, 61 psi).
TIRES MODE FUNCTIONAL SETTING WHEN USED TIRE PRESSURE
Continental O/P
01-567-7853
ON = O/P TIRES ​OPERATIONAL Sweeping 12 PSI
Continental O/P
01-567-7853
ON = O/P TIRES OFF ROAD Off-Road 15 PSI
Continental O/P
01-567-7853
ON = O/P TIRES ON ROAD On-Road 29 PSI
Continental Road
01-567-7853
ON = O/P TIRES ON ROAD On-Road 29 PSI
Michelin Road
01-680-8939
OFF = ROAD TIRES OPERATIONAL Off-Road 50 PSI
Michelin Road
01-680-8939
OFF = ROAD TIRES OFF ROAD Off-Road 50 PSI
Michelin Road
01-680-8939
OFF = ROAD TIRES ON ROAD On-Road 61 PSI

A future update to TM 9-2355-316-10 (Jun 19) will include the new CTIS pressures. 
        
Be forewarned, the updated CTIS control box placard no longer lists tire psi for each of the settings, and the updated tire placard located on the fenders now only lists “61 PSI” for the road tire. All of these changes mean operators and mechanics need to know which wheel assembly is on their vehicle.
        
An MWO 9-2355-316-50-7 tag (which essentially states that the MWO has been applied and the date) will be applied inside the auxiliary storage compartment located on the rear of the HUSKY cab.

For more information on MWO 9-2355-316-50-7, refer to TACOM LCMC MI 20-001.  It’s online at: