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  #1  
Old 08-08-2020, 04:24 AM
chris mitchell chris mitchell is offline
 
Join Date: Jul 2006
Location: near Harrogate, England
Posts: 392
Default Dead PlanePower alternator- internal bits and wiring?

I have an alternator that died a while ago (on the apron at a French airport - but that's another story). Trying to get it repaired is a bit of a nightmare. Does anybody know the part number of correct voltage regulator and does anyone have a wiring diagram for the internal workings?

The wretched thing has been repaired once already, still doesn't work and getting it back to PP/Hartzell is going to be a chore which I would rather avoid (shipping from UK to US, ddealing with customs, etc etc etc. So any information will be gratefully received.

Many thanks

Chris
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  #2  
Old 08-08-2020, 04:45 AM
74-07 74-07 is offline
 
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Location: Greenville, SC
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Chris,

My experience has been that the internal voltage regulator is proprietary and not available from any source including Plane Power. A very well regarded local shop kept mine for three weeks trying to locate the correct part and finally gave it back to me unrepaired. A call to Plane Power resulted in the answer, "We don't offer parts or overhaul."

The PP alternators are basically throw away items once that element has failed.
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  #3  
Old 08-08-2020, 05:23 AM
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DanH DanH is offline
 
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The VR from a few years is marked 6621, and appears to be modified by Unipoint or perhaps Plane Power. The number is not listed in Unipoint's regulator catalog. The apparent mod is a jumper wire from the board to a brush terminal. It may be possible to order a 662 and make the mod, or simply install one of the other 66xx regulators and forgo whatever the jumper enables.
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  #4  
Old 08-08-2020, 07:04 AM
lr172 lr172 is offline
 
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It seems the common failure for these alternators is broken wires on the stator. May want to give a look inside before modifying the VR. Several posts on the subject.

Larry
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  #5  
Old 08-08-2020, 07:22 AM
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Lenny Iszak Lenny Iszak is offline
 
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AircarftSpruce sells the regulator:

11-1043 HARTZELL PLANE-POWER REGULATOR BRUSH ASSY

A compatible rectifier block is INR724.

I keep one of each in my toolbag, they are easy to swap.

Lenny
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  #6  
Old 08-08-2020, 10:51 AM
chris mitchell chris mitchell is offline
 
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Default Thank you for help!

Thanks guys that's all helpful. Considering how much the thing cost I'm disinclined to throw it away!

Dan -H - interesting about the connection from the board to the brush terminal. The technician who has it at present is curious about that. We have been on to PP/Hartzell. Waiting for a reply....

When/If I get an answer I'll be sure to post it here.

Thanks again

Chris
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  #7  
Old 08-08-2020, 10:59 AM
RVDan RVDan is offline
 
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Aircraft Spruce has the Hartzell part
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  #8  
Old 08-08-2020, 11:38 AM
74-07 74-07 is offline
 
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I'll be very interested in their reply since I was told there were no repair parts or overhaul available. That came directly from Plane Power. Also, is the ACS regulator modified with the jumper? If my memory is correct, the regulators are modified by Plane Power and they wouldn't sell a modified replacement. I also seem to remember that the board and the jumper were encased in some sort of potting material.

Last edited by 74-07 : 08-08-2020 at 11:56 AM.
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  #9  
Old 08-08-2020, 01:07 PM
chris mitchell chris mitchell is offline
 
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Quote:
Originally Posted by RVDan View Post
Aircraft Spruce has the Hartzell part
Dan - can you point me to this part at ACS please? I can see external regulators but nothing that resembles what I think we need.

Thanks

Chris
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RV-8, QB, built, flown 150 hours, sold;
RV-4 - attempted repair, rebuild and remediation - abandoned and junked ;
RV-4 fuselage and wing kits - both at QB stage;
2015-2018 dues paid!
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  #10  
Old 08-08-2020, 01:36 PM
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Pat Hatch Pat Hatch is offline
 
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Quote:
Originally Posted by chris mitchell View Post
Dan - can you point me to this part at ACS please? I can see external regulators but nothing that resembles what I think we need.

Thanks

Chris
Chris, the Spruce part number is 07-17968, $80.75.
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