Home : Articles
Have a Soldier/Warfighter who takes pride and ownership of their assigned equipment? Then nominate them for PS Magazine's "I Own This" recognition program. Click HERE to learn more.

PS Magazine poster image
Click on image above to view and
download 
this and other posters
Articles
NEWS | Dec. 2, 2020

M1A2 SEPv3 Tank: Keep Engine Timer Powered Up

Crewmen,

It’s critical that you make sure circuit breaker 1 (CB1) on your M1A2 SEPv3 tank’s power interface box (PIB) is turned on at all times. Why? Because the timer that records how many hours your tank’s engine has run is powered by the engine memory unit (EMU) harness connected to the PIB.
        
The EMU is a storage drive for data coming from the digital engine control unit (DECU). This data is used to help determine engine health, assist in troubleshooting and pinpoint engine failures that are repaired at depot.
        
Here’s how you can make sure the engine timer gets the power it needs to do its job:
 
  • Keep an eye on the wiring harness that runs to the DECU from the PIB. In order to operate the EMU and timer, the wiring harness must be connected. Don’t disconnect it for any reason.
Make sure wiring harness is connected 
Make sure wiring harness is connected 
 
  • Be aware that PIB CB1 provides power for the engine timer and can flip off, causing a loss of critical data. This can happen when there’s an overload from the engine not having enough power to start or if the tank is slave started.
     
  • Make checking the circuit breaker a regular part of your BEFORE OPERATIONS PMCS.
Check circuit breaker as part of BEFORE OPERATIONS PMCS
Check circuit breaker as part of BEFORE OPERATIONS PMCS 
Want to get better search results faster? 
Click the link below to access our "how to" guide
.
LOGSA Links/URLs
Note about links to archive articles

If you come across a link to a pre-2014 PS Magazine issue or article that uses LOGSA in the web address (URL), use this link instead:
 
For issues/articles from 2014 and after, click on the Archive/Index tab in the top menu of this website.

BE ADVISED: With the migration to Army365, emails in older articles may still reflect an @mail.mil address. To update, change the domain to @army.mil