I've taken apart the driver and pax door ones, and the hatch is similar.
There is a good writeup of how they work here:
http://www.gowesty.com/library_article.php?id=314 . I found bench
application of 12V helpful to see how they work, kind of neat.

<http://www.gowesty.com/library_article.php?id=314>The round gear rotates in
the same direction for both lock & unlock. To answer your question I don't
think there is a 'set point'. I think the only thing to watch for is ensure
that the round protrusion from the large gear is not placed inside the
hollow triangle (white plastic, about 10 o'clock from your pen point in pic
3). This would prevent the gear from rotating.

So I'd just put it together, plug it in, and it should get in sync with the
other locks automatically. Mine did, the two times I pulled them. Of course
test before reassembling door panels...I don't know about the spring, mine
seemed intact so I didn't mess with it.

For the archives, my driver's door actuator wasn't working. The boot on top
was falling apart and the insides were corroded. I took it apart and cleaned
the contacts and it works fine. I also found a used one in a Eurovan-
they're the same unit, just need some splicing of wires to make the
connectors match. Step 6 of this link shows how to remove the Eurovan door
panels: http://members.cox.net/gti_matt/spiegelblinker/spiegelb.htm

Joe

On Mon, Apr 25, 2011 at 4:08 PM, Donald Pelava <1coolmollydog@gmail.com>wrote:

> Hello,
>
> Has anyone taken apart the rear automatic hatch motor housing? I believe I
> have it right to re-assemble but a few items
> are confusing. Pictures are here:
> http://www.flickr.com/photos/62140935@N05/
>
> #1 Shows both housings, top picture has motor and gears
>
> #2 Shows large gear removed and flipped over. The round notch concerns me,
> as with the motor removed the notch simply
>    moves the plunger L/R  (lock). With motor in it is rigid. On reassemble
> is their some sort of "set point" for the notch, or
>    just install the large gear and  the contacts on the other housing will
> simply center the motor/gear to were everything
>    should be.
>
> #3 The pointed piece has a spring on the inside, causes tension when the
> plunger (bottom right) is pushed IN. As far as I can tell
>     unless the motor is active, seems to be no "spring tension" on the
> plunger. Is this correct? What is this spring for?
>
> Thanks for any advise, Don (AZ)
>