Write up or guide available for alternator pulley install?

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71DodgeDemon340

71DodgeDemon340

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I know some have told me i can just heat up the pulley, and use a aresol can to freeze the shaft and the new pulley will go on with ease? Others have recommended to take the alternator apart to press the pulley back on, i have access to a press but is there a write up on alternator disassembly or pulley install? Any tips? Things i should look for? Parts that need to be handled delicately? Thanks for any advice or links, im swapping out my steel Alt pulley for a march billet pulley, i really want to get it right without messing it up. I need to put the new pulley in exactly the same spot as the old pulley is now
 
Ive never been real successful at removing them. I did buy a specific puller for doing it but have not had a reason to remove one on a stock Mopar alternator because I run Nippo Denso units on my cars
 
We used to just press them on. If we had time we'd toss the rotor into the shop freezer for an hour (and then the bookeeper/ secretary would wonder????) You need to protect the press end of the rotor shaft with something like a brass/ wood piece to avoid messin the end of the shaft, which fits into the rear needle bearing

The puller is the trick. You need a purpose built puller, and a good one and same with PS pumps
 
Use a puller to remove the pulley. The alternator must be disassembled to press on the pulley. The pulley, armature, front housing with bearing are all pressed together as an assembly. When all are pressed together tightly the pulley is in the proper place.
 
So i guess my main concern is if i split the case will a bunch of parts just fall out? When i remove the old pulley will it affect the fit of the bearing? Will the shaft become loose? Ive could only find one picture of an chrysler alternator set up on a press but it wasnt the best picture, for some reason it wouldnt pull up right and looked grainy but it was just the front half of the case and the center shaft was visible which was supported with a block of wood as the pulley was pressed on. I just didnt know if when you split the case what all becomes loose
 
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The brushes mostly Then you have to retract them upon reassembly. From the Allpar site....Vintage Chrysler electrical repairs and updates

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Demonic said:
The brushes mostly Then you have to retract them upon reassembly. From the Allpar site....Vintage Chrysler electrical repairs and updates

View attachment 1715470530
Click to expand...

how do you remove the brushes? It says remove the brushes then the 3 through bolts and then pry the case apart. I see know that everything is pretty much contained in the two halves but when i set the front half of the alternator on the press will anything fall out? Or is everything pretty much secure?
 
I have a motors manual book may look in there too. Where can i find the service manual? Is it available online?
 
Remove the two brushes, one screw holding each one (total= two screws). With crayon or chalk, draw a line through the rear housing, stator windings and front housing so that upon re-assembly these pieces will be correctly "clocked". Then remove the three thru-bolts and separate.
 
Heads up! Use a press- never beat armature with a hammer. Beating on the armature to install the pulley will separate the components of the armature, damaging it.
 
Yes, is OK. If you feel up to it, this is usually the time we would replace the brushes and the front and rear bearing. They are cheap.
 
They should be good, the alt is about 7 years old but not a ton of miles, spins free with no grittyness. Also it wont hurt to put some grease on the rear needle bearings would it?
 
OK to grease rear bearing but not too much as it will fly off, coating things inside. Residue inside is not usually a problem, just hit it with the air gun.
 
Fan- just blow it off. The two sections of the commutator- lightly sand these for good brush contact.
 
Caution on the 3 jaw puller, I ruined more than one pulley trying that technique, tends to bend the pulley which is why I bought the right puller.
 
Good point! I recommend buying the real puller for this as it also fits the P/S pulley. Dare I say it- also fits some of those "other" cars too.
 
This type puller (or similar) is what you need. Without a threaded alternator shaft, you can't install the pulley back on with an installer. It needs to be pressed. Take the alt apart, heat the pulley and cool the shaft before pressing back on. We used to use freon to cool it but that's a big no-no now.
 
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