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1927Chevy

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Posts posted by 1927Chevy

  1. Its reinstalled and charging

     

    what should output be at idle zero, at high rpm goes to 20amps drops to 12amps via resistor I assume, any other comments on output appreciated

     

    1927 chevy 943b armature, cut off threaded end of armature shaft with my grinder 5/8 inch or so, needed to be shorter.  had to drill out the coupler to accept the 943b armature front shaft diameter used 11/16 bit did not go all the way thru did not need to. 943b armature shaft 3/32 larger.

     

    could have used 943b case (has no resistor) with 917e nose bearing plate.  I wonder why the 943b does not have resistor and the 917e does.  perhaps the windings are different and the 917e puts out more.  the 939x case that I used had 1 bolt field coils the 917e had 2 bolt field coils.  the 939x armature windings were longer same length as the 917e.  the 943b (1927 chevy armature which I used) has shorter windings. all same diameter.  installed the unit behaves like manual describes.  charge gets large and then as rpm increases drops from 18 to 12amps.

     

    used the 939x case as it has resistor but single bolt field coils.  939x end plate and case, 943b armature, 917e front bearing plate. had to use a spacer on armature front.

     

    had to modify following, cut 5/8 or so off 943b armature, drill hole in 939x case to accept stud that wire harness connects to, had to enlarge and tap the threads on 917e front bearing plate to fit larger diameter long bolts 5/16 18 tap, drill hole in case to accommodate side mount stud engine side top attaches to bracket, enlarge coupler hole to 11/16 did not drill all the way thru.

     

    one more issue to resolve the case needs to be rotated 180 degrees so I will remove and drill a new hole in front bearing plate to accommodate the rotation.  access to 3rd brush enhanced.

     

    more soon with pics

  2. Things have evolved, the above case Remy 939x appears to be ready for the 917e nose on the 939x armature.  the armature from the 939x is longer by the threaded portion that the pulley is mounted on.  If the threaded portion is cut off the 939x armature the remaining portion is a keyed shaft the same length and diameter as the 917e before step down.  The 917e shaft end steps down to accept the pictured coupling.  The 939x shaft end does not step down.  Its not much.  I am thinking about drilling out the coupling so it will slide on the larger 939x shaft.  I get nervous drilling the coupling, anyone got an extra one?

     

    It appears to me that the later 27-28 Chevy Remy 943 generator case is the same as the Remy 939x but does not have a resistor which I am thinking is not needed anyway with the 27-28 Remy 943 armature set up.  I just happened to find one with a resistor.  The resistor can be removed from the Remy 917e case and mounted on the 27-28 Remy 943 Chevy case. Just got a nice Remy 943 in good shape delivered for 50 bucks from ebay.

     

    I found new armatures and field coils on ebay 100 bucks total but will go with used that I have unless they do not work well.  More soon.

     

     

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  3. Further along with my thoughts, The relay 263 f Remy is a cutoff switch and noted in the service manual. On my Chevy's they are bolted to generator.  I do not see one on my 1923 EK generator.  It does have a resistance unit by the brushes.  I do have an extra 6 volt generator Remy 943  from my 1927 Chevy's that has a 3rd brush and cutoff but no resistance unit.  Is the resistance unit required? I wondered if I could use that case.  It looks similar.  The field coils have one bolt for 1927 but 2 for 1923.

    It looks a lot like the 949 Remy with different nose.

    Wish I knew more about electricity.

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