The upgraded alternator replaces the existing HMMWV alternator using an upgrade kit available in the Army inventory. Information on this kit is available in the HMMWV Electronic Technical Manual, section TM 9-2320-280-24P-2. The upgraded alternator adds 52 pounds to the HMMWV, but this is balanced by the fact that this system replaces a conventional diesel motor/generator set that weighs approximately 1000 lbs. The diameter of this alternator is 10.4" and its width is 15.63."