Re: [COUPERS-TECH] Nagging charge problem

[Wayne]

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Some Alon's have a generator field switch.

 

Wayne Woollard

 

 

 

 

 

 

 

----- Original Message -----

From: heavensounds

To: Hartmut Beil ; Steven Finkelman ; Ercoupe Tech

Sent: Sunday, October 23, 2005 7:54 PM

Subject: Re: [COUPERS-TECH] Nagging charge problem

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Interesting.

 

The steps included seem to be specific to the Zeftronics regulator, specifically where it reads: " turn on the GEN FLD switch". My take is that this is a switch in the Zeftronics regulator.

 

Anyone knows the steps to flash the generator with a normal (non Zeftronics) regulator?

 

Eliacim Cortes

N87071

 

----- Original Message -----

From: Hartmut Beil

To: Steven Finkelman ; Ercoupe Tech

Sent: Sunday, October 23, 2005 2:46 PM

Subject: Re: [COUPERS-TECH] Nagging charge problem

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Steven

 

I just helped out an owner of a Cessna to flash the Generator.

 

His went to refusal of work despite being overhauled a while ago. He even had a new regulator.

 

We followed the outlined instruction and fired up his engine. It just worked. His alternator came to life. Since I never experienced this kind of trouble with a generator, I was amazed by the simple fix.

 

Maybe you are as lucky as my fellow Cessna pilot.

 

 

Hartmut N3330H

 

A excerpt of a Zeftronics manual follows. If needed, I can send you the full PDF file.

_____________________________________________________________________________________

TROUBLE-SHOOTING TYPE A 12 TO 50 AMP DELCO-REMY

SINGLE ENGINEGENERATOR SYSTEMS

By: Femi G. Ibitayo

CHECKING THE RESIDUAL VOLTAGE AND

POLARITY OF THE GENERATOR

Connect a voltmeter between the generator’s ARM and

ground. At 1300 RPM, the generator output or residual

voltage should be positive (greater than +1.6V).

Residual Voltage __________V @ __________RPM

A negative voltage reading indicates a generator that

has a reverse polarity. Do not connect the GCU to a

generator with reversed polarity.

Turn off the engine and Polarize the generator by

flashing the field.

HOW TO FLASH THE GENERATOR’S FIELD:

1. With the engine off, disconnect the Generator

Controller (GCU) / Regulator

2. Ground the Field wire removed from the GCU

and turn on the GEN FLD switch

At the GCU: Touch the battery wire to the generator’s

armature wire 5 times for 3-5 seconds. Caution: Take

safety precaution to prevent being hurt by electrical

sparks generated by touching the two wires.

3. Connect a voltmeter between the generator’s

ARM and ground. At 1300 RPM, the generator

output or residual voltage should be >+1.6V.

ARM Voltage ________V @ _________RPM

 

 

______________________________________________________________________________

//--end of message ->

----- Original Message -----

From: Steven Finkelman

To: Ercoupe Tech

Sent: Sunday, October 23, 2005 9:22 PM

Subject: [COUPERS-TECH] Nagging charge problem

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List,

 

I am having some charging system problems here and I just can't figure them out.

 

 I had the generator rebuilt , and the regulator tested.. Both were found good, although I did not stand over the tech to see the results.

 

But when I installed the generator, I do not get anything like a full output, and that is with the field grounded.

 

I thought it was a problem of not getting high enough revs on the ground. But today I went for my first flight after all my rebuild work. The plane flies beautifully, and I am particularly proud of how smooth the ignition is since I re-installed the mags and timed them myself. (I am running on the Canadian owner maintenance provision so I can do that).

 

But my digital voltmeter which I have stuck in the lighter socket is not going above about 12.1 and not showing any real increase once the cruise rpm comes up to 2200.

 

The only thing I have not done yet is to open the plan up and see if it comes up at higher full power cruise revs.

 

Before I pull the generator once more ( a pretty ugly job if you have done it) do you have any advice?

 

I am going to post this as well in the hopes of finding someone who has had a similar experience.

 

It almost makes me want to tear the system out and convert to the alternator but that is big bux.

 

Thanks

Steve Finkelman

CFIWR

Forney F1

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