This unit can replace the 90 Amp, 120 Amp and 150 Amp alternators without ANY modification. The 200 amp alternator is larger in diameter than the three lesser amperage units. Even so, it can still be installed without modification. There is very little space to work in this area so, keep this in mind, as it will require some patience during the installation process.
To check the integrity of your
alternator pulley, simply remove the belt and place a screwdriver into
the front of the alternator cooling fan to stop the armature from
rotating. Then turn the pulley by hand. If it rotates one direction but,
not the other, it is functional. If it will not rotate at all, it has
failed and needs to be replaced.
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This is the identical alternator sold at a franchise Dodge or Freightliner dealership. Since it is brand new, no core deposit is required.