1977 M20J with 1057-00-5G Actuator issue

[N201MKTurbo]

15 hours ago, DEGWS said:

Did also an extension with the emergency system. Very easy without any noticeable binding.

I am also able to turn the actuator with one finger on the rubber coupling.

Is it possible to remove only the motor?

It isn't too hard to take the motor off after you take the actuator out of the plane.

It sounds like a good time to clean, inspect and lube it anyway. The hardest part of removing it is undoing the wires, and you will have to do that if you remove the motor.

[DEGWS]

Removed the actuator from the plane today. Not a big deal!
 

Seems to be difficult to find a shop here in Germany our Europe to overhaul the motor....

 

Any recommendations?

thanks.

[jetdriven]

Send it to George’s electrical service in Sacramento CA.  Or send it to LASAR which then sends it to him and marks it up a third. 

[peterl]

Georg´s Electrical Service closed the business as of Dec 31st, 2019. What a loss!

[jetdriven]

Great.. now who does these motors?  

[EricJ]

1 hour ago, jetdriven said:

Great.. now who does these motors?  

Any electric motor shop can work on the motor.   Your A&P/IA can supervise or inspect the result for the reinstallation.

[jetdriven]

I wholeheartedly subscribe to that theory, but where do you get bearings and brushes and things like that?

[Guest]

11 hours ago, jetdriven said:

Great.. now who does these motors?  

I wonder if Aero Motors LLC could do them?  Their capabilities list was impressive.

Clarence

[larrynimmo]

according to my A&P, you can only send something like this to an FAA approved repair station....such as LASAR...

you can't just send it to a shop.  I do think LASAR carries the motor and I believe it is actually under $500...plus installation.  When I looked at my actuator, the motor to me looks like an off the shelf windshield wiper motor!

[Guest]

It looks like Aero Motors is FAA approved.

 

[jetdriven]

You’ll have to call them. They usually have to have the item on their capability’s list.  For example they wouldn’t re-brush my globe motor from my autopilot servo. 

[bradp]

I like using WD40 for a cutting fluid when I’m cutting or drilling sheet metal.  
 

[Yetti]

14 hours ago, bradp said:

I like using WD40 for a cutting fluid when I’m cutting or drilling sheet metal.  
 

No where near as good as the old cutting oil with sulfur in it.   But it is good for fixing squeaky fan belts.

[DEGWS]

I am in contact with Lasar. The answer after two day is that they found nobody who will do the motor.

I am sure that the problem is the rotor. Next week I will try to fix the rotor with a lathe of my friend.

But it is crazy... No overhaul or spare parts availble for the motor!

[Yetti]

5 hours ago, DEGWS said:

I am in contact with Lasar. The answer after two day is that they found nobody who will do the motor.

I am sure that the problem is the rotor. Next week I will try to fix the rotor with a lathe of my friend.

But it is crazy... No overhaul or spare parts availble for the motor!

Lube the landing gear.   Lube the gears in the actuator.   See if that don't fix things up.   There are bearing shims that need to go back in properly.   Sounds like your gears on the actuator rod may have gone out.

[DEGWS]

4 minutes ago, Yetti said:

Lube the landing gear.   Lube the gears in the actuator.   See if that don't fix things up.   There are bearing shims that need to go back in properly.   Sounds like your gears on the actuator rod may have gone out.

Again, motor has no power, also on bench test.

actuator is in perfect condition!

Edited February 1, 2020 by DEGWS

[Yetti]

4 minutes ago, DEGWS said:

Again, motor has no power, also on bench test.

actuator is in perfect condition!

Then start with the brushes.  After checking the wiring for imperfections.

Usually it is some type of connection of wires or solder joint.  Very rare that the windings or such fail.

Edited February 1, 2020 by Yetti

[cliffy]

6 hours ago, Yetti said:

No where near as good as the old cutting oil with sulfur in it.   But it is good for fixing squeaky fan belts.

MMMMMM:-)   Black sulfur cutting oil- grew up in a machine shop and that's all we smelled all day long.

I have  a gallon in the shop right now!

[Yetti]

9 minutes ago, cliffy said:

MMMMMM:-)   Black sulfur cutting oil- grew up in a machine shop and that's all we smelled all day long.

I have  a gallon in the shop right now!

I have some left.  Probably going to be sad when it is gone.   But sure does make a mess.

[DEGWS]

Brushes are still around 10mm, not so bad. The problem is the contact between brushes and rotor. The rotor contacts show a concave wear that the brushes have only weak contact on the sides.

 

[jetdriven]

You’ll have to turn the commutator.  Not sure how much meat is on that. 

[JT]

I owned a 1976 J for many years and was forced into a gear up landing because of the gear actuator, neither the motor nor the emergency crank on the sidewall would bring the gear down. This was in the 1980's and I'm not sure of the details but I was told at the time that Mooney upgraded the actuator to a different manufacturer very early on in the J's production life. I was also told that there is a SB for inspection on the actuators still in service, which I believe were made by Dukes. If your actuator is a Dukes, I would look into swapping it out.

[jetdriven]

I think the Eaton actuators are like $16,000 apiece, and you have to order 10 of them at once, and then have six month lead time. Perhaps used would be easier.  

[DEGWS]

Today I have turned the commutator. Was considerably out of round. With the new brushes motor is running like new. Except the bearings are not ok. So I have ordered two new bearings and hope to get them tomorrow.

I think damage of the commutator was due to the bearings.

[cliffy]

Did you by chance under cut the insulators between each section of the commutator? If not that needs to be done , On larger normal generators we did it with a broken hack saw blade. You need to look up how to do it. You have to keep the insulators below the outer circumference of the  copper commutator segments.