Author Topic: Window Motor Installation  (Read 367 times)

Mattr

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Window Motor Installation
« on: 18 April 2020, 03:18 PM »
Hey folks,

So, I'm working on trying to rebuild the interior of my blue 6.9, and came across a problem: I've no idea how to get the window motor into place. I tried feeding it through the small opening at the bottom, but that doesn't seem to work. Does the door itself come apart? I saw bolts on part of it, but other parts looked like they were all one giant piece, and so I wasn't certain how this is supposed to be done.

I checked the service manual and it says "unbolt motor. Remove" in fairly literal terms. Left me a touch confused as to how to get the gorram thing out of the door.

Also, the plastic sleeves that cover the motor assembly on mine are all pretty beaten up/cracked. Is this a part I can buy separately, or something I should hit up my 3D-printing friends for? I didn't see a part number on it (but it was dark and I was pissed after smashing my knuckles trying to wiggle the motor into place, so I might have missed it).

1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333

ptashek

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Re: Window Motor Installation
« Reply #1 on: 18 April 2020, 04:13 PM »
You have to unbolt the motor after removing the regulator. Once the regulator is out, the motor should be able to turn to its side and slide out. I can't recall it being especially difficult having done all four.

As for the housing, it's not a separate part. If you have access to a 3D printer it'll be very simple to reproduce.
1993 "Pearl Blue" W124 280TE
1979 "Icon Gold" W116 450SE (history, resto)

Mattr

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Re: Window Motor Installation
« Reply #2 on: 18 April 2020, 05:19 PM »
I have the motor and regulator out . I'm trying to get it back in, and it doesn't fit. There is a vertical rail from the window frame installed, do I need to remove that as well? 
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333

ptashek

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Re: Window Motor Installation
« Reply #3 on: 19 April 2020, 03:32 AM »
I have the motor and regulator out . I'm trying to get it back in, and it doesn't fit. There is a vertical rail from the window frame installed, do I need to remove that as well?

The rail the window slides on? Yes, that needs to come out too.
1993 "Pearl Blue" W124 280TE
1979 "Icon Gold" W116 450SE (history, resto)

Mattr

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Re: Window Motor Installation
« Reply #4 on: 19 April 2020, 11:14 AM »
I have the motor and regulator out . I'm trying to get it back in, and it doesn't fit. There is a vertical rail from the window frame installed, do I need to remove that as well?

The rail the window slides on? Yes, that needs to come out too.
Yeah, Looking at it again last night, I realized that it was installed after the window got pulled so that he could re-add the mirror to the vehicle. I started the disassembly of the window frame last night, but got stuck on the over-the-window trim piece. I need to pop out my shop manual and figure out how it comes off.
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333

Alec300SD

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Re: Window Motor Installation
« Reply #5 on: 19 April 2020, 01:25 PM »
I did this job a last year...without removing the window pane.
http://www.peachparts.com/shopforum/diesel-discussion/400401-1978-w116-window-regulator-replacement-%96-driver%92s-door.html
If you are not adverse to drilling the three access holes (per the FSM job 72-185), you can as well.


Since the motor is out of the car, you need to separate it from your regulator and position the motor in the door frame.
The motor is reattached once the regulator is back in the door frame.

Prop the window up.
I use  a couple of long strips of blue painter's tape looped over the window frame and attached to the interior and exterior of the window pane.

Remove your door check to have room to postion the motor in the vertical well.
With the motor in position, use a large combo wrench as a place holder to keep the motor pushed against the exterior skin of the door.
Run the harness wires and elecric motor wires throuh the opening in the interior door bracket (where the vacuuum pipes rum).
Reinstall your window regulator and snug the two bolts and the nut.

Get a good strong flashlight.
Sit on the ground have your eyes level with the 3 access holes for the electric motor.
With one hand holding the bottom of the motor housing and the other holding the flashlight, position the motor so the bolt holes line up.
Put down the flashlight, insert a small Phillips screwdriver into the top bolt hole.
Push the motor firmly against the window regulator, while using your other hand to start the lower rear bolt.
Install the lower front bolt, then remove the Phillips screwdriver to  attach the top bolt.

Slide the black harness protector sleeve back over the 4 wires and attach them to the teminal block.
Reattach your window regulator arm to the window channel at the base of the window pane.

Note:  Lock the window regulator arm against lower part of the window track with needle-nose vise grips...to make it easier to install the clip on top of the cupped star washer.
Also don't forget to lubricate the moving parts of the window regulator, vertical track, and the sliding jaws.
« Last Edit: 19 April 2020, 02:14 PM by Alec300SD »
79 W116 300SD 'Stormcloud' new as of 10/22/2017
78 W116 300SD 'Desert Rose' new as of 01/26/2014
83 W126 300SD 'Rena 2.0' with engine from 82 W126 300SD Rena' (SOLD and crushed 11-20-2017)

Mattr

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Re: Window Motor Installation
« Reply #6 on: 20 April 2020, 05:25 PM »
I did this job a last year...without removing the window pane.
http://www.peachparts.com/shopforum/diesel-discussion/400401-1978-w116-window-regulator-replacement-%96-driver%92s-door.html
If you are not adverse to drilling the three access holes (per the FSM job 72-185), you can as well.


Since the motor is out of the car, you need to separate it from your regulator and position the motor in the door frame.
The motor is reattached once the regulator is back in the door frame.

Prop the window up.
I use  a couple of long strips of blue painter's tape looped over the window frame and attached to the interior and exterior of the window pane.

Remove your door check to have room to postion the motor in the vertical well.
With the motor in position, use a large combo wrench as a place holder to keep the motor pushed against the exterior skin of the door.
Run the harness wires and elecric motor wires throuh the opening in the interior door bracket (where the vacuuum pipes rum).
Reinstall your window regulator and snug the two bolts and the nut.
My car has the afore-mentioned holes already drilled in it. I can't get the motor to slide past the window rail that's near the mirror.
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333

Alec300SD

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Re: Window Motor Installation
« Reply #7 on: 20 April 2020, 07:17 PM »
Ah, I see the dilemma, you are aproaching from above, but you need to approach from below.

With the door check removed, from below slide the motor in horizontally gear first (as if it were the actual door check).
Then pivot the the motor up so it is vertical in the well.

Next  push the motor in the well towards the outer door skin and wedge a tool to keep it in place.
This will give you the room to install the regulator.
79 W116 300SD 'Stormcloud' new as of 10/22/2017
78 W116 300SD 'Desert Rose' new as of 01/26/2014
83 W126 300SD 'Rena 2.0' with engine from 82 W126 300SD Rena' (SOLD and crushed 11-20-2017)

rosenfe

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Re: Window Motor Installation
« Reply #8 on: 25 April 2020, 12:56 PM »
Check mercedessource web site for their video on window regulator replacement. He shows you how to get motor back in.

Mattr

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Re: Window Motor Installation
« Reply #9 on: 25 April 2020, 03:19 PM »
Check mercedessource web site for their video on window regulator replacement. He shows you how to get motor back in.
Yeah, I saw that. I am half-tempted to spend the $15 to buy the video, but was trying to avoid that. Every time I go to fix something, I find something else that needs doing, and suddenly I'm out several hundred more (in parts, bizarre, specific tools, etc) than originally planned.
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333