This from Mike Summa for #TBT:

For TBT-This is a Chicago Heights engine.  It is a 900 series American LaFrance and that is all I know about it.  If anyone out there knows more, please feel free to supply the answers.  Enjoy and comment.
Mike Summa
#chicagoareafire.com; #MikeSumma; #FireTruck; #AmericanLaFrance; #TBT; #ChicagoHeightsFD;

Mike Summa photo