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#334966 - 04/15/17 04:48 PM Generator Service
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Where is a good place to send a Delco-Remy generator for service and yellow tag?

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#334977 - 04/15/17 07:10 PM Re: Generator Service [Re: Sky 21]
Hawk25U Offline
Pilot in Command

Registered: 03/07/10
Posts: 282
Loc: New Hampshire
I've used this outfit for overhaul on my 35 amp Delco-Remy generator and still working fine after 800 hours.
http://www.aerotechlou.com/

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#334979 - 04/15/17 07:25 PM Re: Generator Service [Re: Hawk25U]
Joeman434 Offline
Diamond Pilot

Registered: 02/19/14
Posts: 6922
Loc: Ocala, Florida
What is the problem with your generator?
_________________________
Do it right the first time.

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#334983 - 04/15/17 08:17 PM Re: Generator Service [Re: Hawk25U]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Hawk25U
I've used this outfit for overhaul on my 35 amp Delco-Remy generator and still working fine after 800 hours.
http://www.aerotechlou.com/


Thanks Hawk.

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#334985 - 04/15/17 08:20 PM Re: Generator Service [Re: Sky 21]
combahee Offline
Pilot in Command

Registered: 07/29/12
Posts: 434
Loc: Lowcountry, SC
I used Aerotech of Louisville, http://www.aerotechlou.com/
_________________________
1959 172 straight tail

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#334986 - 04/15/17 08:32 PM Re: Generator Service [Re: Joeman434]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Joeman434
What is the problem with your generator?


The 57 model now has a 20A generator that was installed a few years back for some reason. Since we have been redoing this plane there is now more things to power. GPS, radio, electronic RPM etc. I don't feel that the 20A is charging the battery correctly. The plane has a new gill 7025-20 sealed battery and I keep having to charge it. The battery checks fine.

I have found a used 35A generator that is suppose to be good but wanted to make sure before going to the trouble of installing it.

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#334987 - 04/15/17 08:40 PM Re: Generator Service [Re: Sky 21]
Joeman434 Offline
Diamond Pilot

Registered: 02/19/14
Posts: 6922
Loc: Ocala, Florida
OK...I got it....most mechanics should be able to check it out and make any repairs if necessary. You may have to upgrade the regulator as well. The last time I needed one, I hard time finding one.
_________________________
Do it right the first time.

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#335010 - 04/16/17 08:08 AM Re: Generator Service [Re: Joeman434]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Joeman434
OK...I got it....most mechanics should be able to check it out and make any repairs if necessary. You may have to upgrade the regulator as well. The last time I needed one, I hard time finding one.


Thanks Joe. I did get the regulator with the generator. Another question. The A wire coming from the generator goes to a suppessor (capacitor) then from there to the A terminal on the regulator.

The suppressor has a terminal on either side but the wire only goes to one side. I would of thought that the wire would need to come in one side on the terminal and out the other side terminal to the regulator in order to do any good. Is this connected wrong? And is this even necessary with todays radios?

I have attached two pictures, one showing the drawing from the service manual (see arrow for suppressor) and one of the actual suppressor on the plane.



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#335013 - 04/16/17 08:31 AM Re: Generator Service [Re: Sky 21]
Joeman434 Offline
Diamond Pilot

Registered: 02/19/14
Posts: 6922
Loc: Ocala, Florida
It looks like the two wires are on the same post on what looks like a noise suppressor. It probably failed so they just hooked the wires together on one post. You may need to replace it at some point. I'm sure you know you will most likely need to replace the main breaker as well....it may not be heavy enough for the 35 amp generator.
_________________________
Do it right the first time.

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#335015 - 04/16/17 08:46 AM Re: Generator Service [Re: Joeman434]
Skyhawk28F Offline
Pilot in Command

Registered: 02/03/16
Posts: 306
Loc: Coldhand
If it's not charging your battery have you checked the voltage output? You're going to need 14 to charge the battery, it may be putting out enough to keep radios alive, but not charge the batt. Also if you are taxiing around 5 minutes after landing that will be all battery, the generator goes off line below 1800 rpm, a good reason to use an alternator. My old delco remy 20 amp generator was working good until it started putting out over 16 volts and frying my battery, those old volt regulators can go either way.. not putting out enough or putting out way too much.. out the generator went, and a new alternator went in. Now don't have the problem with the battery running down during taxi anymore because the generator gives out below 1800 rpms


This little volt meter plugs into your cigerette lighter socket and works well https://www.amazon.com/gp/product/B01FFEZL22


Edited by Skyhawk28F (04/16/17 09:59 AM)

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#335036 - 04/16/17 10:59 AM Re: Generator Service [Re: Joeman434]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Joeman434
It looks like the two wires are on the same post on what looks like a noise suppressor. It probably failed so they just hooked the wires together on one post. You may need to replace it at some point. I'm sure you know you will most likely need to replace the main breaker as well....it may not be heavy enough for the 35 amp generator.


Kind of what I was thinking. As it is now it is not doing any good. I will replace it. I changed the generator 20A fuse to a 35A circuit breaker. Thanks again.

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#335038 - 04/16/17 11:06 AM Re: Generator Service [Re: Skyhawk28F]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Skyhawk28F
If it's not charging your battery have you checked the voltage output? You're going to need 14 to charge the battery, it may be putting out enough to keep radios alive, but not charge the batt. Also if you are taxiing around 5 minutes after landing that will be all battery, the generator goes off line below 1800 rpm, a good reason to use an alternator. My old delco remy 20 amp generator was working good until it started putting out over 16 volts and frying my battery, those old volt regulators can go either way.. not putting out enough or putting out way too much.. out the generator went, and a new alternator went in. Now don't have the problem with the battery running down during taxi anymore because the generator gives out below 1800 rpms


This little volt meter plugs into your cigerette lighter socket and works well https://www.amazon.com/gp/product/B01FFEZL22


Good point. It is putting out 13.8 volts with the RPM over 1400. I think that the 20A is just not enough to keep up with all that has been added. It's an on going adventue...yet this is half the fun. The last 172 I had was a 60 model and I did change over to an alternator, light weight starter, new engine, paint and interior. Trying to keep the cost down somewhat this time as I don't fly enough to sink a ton in to it.

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#335039 - 04/16/17 11:13 AM Re: Generator Service [Re: Sky 21]
Skyhawk28F Offline
Pilot in Command

Registered: 02/03/16
Posts: 306
Loc: Coldhand
You could try adjusting your voltage regulator to 14.3 volts, 13.8 might not be enough. My battery calls for 14.2 to 14.7 volts, it's an AGM sealed battery though. 13.8 won't charge it.


Edited by Skyhawk28F (04/16/17 11:14 AM)

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#335040 - 04/16/17 11:16 AM Re: Generator Service [Re: Skyhawk28F]
Skyhawk28F Offline
Pilot in Command

Registered: 02/03/16
Posts: 306
Loc: Coldhand
My generator was probably good, it was the old mechanical voltage regulator probably needed adjusted is all, but I had an alternator ready to install so I put it on.

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#335041 - 04/16/17 11:24 AM Re: Generator Service [Re: Skyhawk28F]
Skyhawk28F Offline
Pilot in Command

Registered: 02/03/16
Posts: 306
Loc: Coldhand
The battery shouldn't take many amps to charge if it is not discharged. My ammeter rarely gets above 3 amps when charging the battery, not an expert here but I would check into getting that regulator to pump up the voltage so you don't ruin your new Gill battery. What is your ammeter reading when you are running everything? Is it pegged at 20 amps?


Edited by Skyhawk28F (04/16/17 11:35 AM)

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#335082 - 04/16/17 02:43 PM Re: Generator Service [Re: Skyhawk28F]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Skyhawk28F
The battery shouldn't take many amps to charge if it is not discharged. My ammeter rarely gets above 3 amps when charging the battery, not an expert here but I would check into getting that regulator to pump up the voltage so you don't ruin your new Gill battery. What is your ammeter reading when you are running everything? Is it pegged at 20 amps?


No it normally stays between 10 & 12 so I see what you are saying. I will try changing out the regulator first as I do have the older mechanical type.

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#335086 - 04/16/17 03:29 PM Re: Generator Service [Re: Sky 21]
Skyhawk28F Offline
Pilot in Command

Registered: 02/03/16
Posts: 306
Loc: Coldhand
They are adjustable, you may not need a new one, just reset it.

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#335090 - 04/16/17 04:16 PM Re: Generator Service [Re: Skyhawk28F]
Flyboy712 Offline
Bronze Pilot

Registered: 08/27/14
Posts: 630
Loc: Washington
Make sure your wiring can handle 35amps before you go changing from a 20amp to a 35amp breaker.

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#335096 - 04/16/17 05:11 PM Re: Generator Service [Re: Flyboy712]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Flyboy712
Make sure your wiring can handle 35amps before you go changing from a 20amp to a 35amp breaker.


Thanks, wiring was redone when new breaker was installed. Done by an avionics shop, not me. I do a lot under supervision of an IA but I respect the plane and safety of others. That's why I ask these questions. Thanks everyone for your help.

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#335188 - 04/17/17 05:57 AM Re: Generator Service [Re: Sky 21]
Joeman434 Offline
Diamond Pilot

Registered: 02/19/14
Posts: 6922
Loc: Ocala, Florida
If you're ultimate goal is to increase the amps for a heavier load, no matter what you do to the 20 amp system, it's still going to fall short...overwork, and cook itself. If you have everything to convert to 35 amps, that's probably your best choice. In today's standards, 35 amps is pretty much low end of the scale. I don't know anybody still using a 20 amp system anymore...most have converted to 50-65 amps. My 182 had a 35 amp charging system...night landings, I had to start shutting things down so I didn't pull the battery down too much.
_________________________
Do it right the first time.

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#335394 - 04/18/17 08:55 AM Re: Generator Service [Re: Sky 21]
Sondavid Offline
Second in Command

Registered: 06/16/16
Posts: 176
Loc: USA
The capacitor in the schematic goes to ground. It would not be in Series with your "A " lead.

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#336077 - 04/23/17 07:38 PM Re: Generator Service [Re: Joeman434]
DeputydogK9 Offline
Silver Pilot

Registered: 12/30/15
Posts: 804
Loc: North Florida
Originally Posted By: Joeman434
I don't know anybody still using a 20 amp system anymore...most have converted to 50-65 amps. My 182 had a 35 amp charging system...night landings, I had to start shutting things down so I didn't pull the battery down too much.


You probably need to rewire to up the amperage especially since your wiring looks original.

I have a 1956 172 still with the 20 amp generator - I installed the Zeftronics G1200N voltage regulator (electronic unit instead of mechanical) It's FAA-PMA approved so just a logbook entry required. With LED landing lights it keeps the battery charged fine. It comes set at 14 volts (varies slightly with temperature) - I typically see 10 to 12 amps at takeoff after a 5 minute taxi and it tapers to about 2 amps within 10 to 15 minutes. Also it comes on-line at between 1400 and 1500 rpm. Would I like more amps available - sure, but don't really need them. Generators are pretty bullet proof. No diodes to crap out and will charge a completely dead battery (uses residual magnetism vs battery power to excite it) so they are still popular in the outback/Alaska etc.

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#338398 - 05/09/17 04:55 AM Re: Generator Service [Re: Sky 21]
Sky 21 Offline
Silver Pilot

Registered: 11/22/11
Posts: 920
Loc: Georgia
Originally Posted By: Sky 21
Where is a good place to send a Delco-Remy generator for service and yellow tag?


Thanks to everyone for advice on generator options and those that recommended Aerotech, they are very nice people to deal with. Checked the 35 amp generator and zeftronics voltage regulartor for only $45.00. Low price knowing all is well before installing them.

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#338408 - 05/09/17 06:21 AM Re: Generator Service [Re: Sky 21]
Cherokeedriver Online   content
Second in Command

Registered: 11/02/14
Posts: 237
Loc: Fresno, CA
The Zeftronics voltage regulator is a good choice. I've put one one both planes I've owned. They have a onboard 3 LED diagnostic indicator system, which is helpful for diagnosing any problems. One of the best ways to reduce the load on your system is to replace the position and landing lights with LEDS. I found this also reduced a significant magnetic compass error.

Can't wait to see more pics of your project.
_________________________
Reformed Piper pilot, '57 Strait Tail 172, IFR, Guitar, Mandolin, Banjo, Kazoo

Blue Skies and Tailwinds...

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#338418 - 05/09/17 08:28 AM Re: Generator Service [Re: Cherokeedriver]
magman Offline
Gold Pilot

Registered: 10/10/12
Posts: 1463
Loc: buffalo NY
A quick check on Gens is to connect Ground to Case

& + to Arm & Field.

If it "motors" it should charge.

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