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1998 G320
Date registered: Dec 1899
Location:
Vehicle(s):
| Window motor servicing
Greetings,
My window got stuck in the down mode (sod's law)- I pulled the panel and lifted it up (there is some life to the motor)- Do I need to secure the window in the up position if I r/r the window motor? What sort of grease is recommended? Thanks in advance,
m
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| RE: Window motor servicing
Which G model and what year? Where are you located? Please fill in your My Profile details so we can better know and help you. |
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79percent
Extreme Veteran
Date registered: Apr 2006
Location: Remscheid / Germany
Vehicle(s): 300 GE
Posts: 537
| RE: Window motor servicing
DUTCH - 6/13/2006 11:33 AM Which G model and what year? Where are you located? Please fill in your My Profile details so we can better know and help you. Ähem, I guess 1998,G320.... and yes, you need to secure the Window first. Mercedes uses a taper key. Klaus |
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Braingears
Expert
Date registered: Apr 2006
Location: St Petersburg, FL
Vehicle(s): G320 & ML320
Posts: 1450
| RE: Window motor servicing
1998 G320 - 6/12/2006 9:34 PM Greetings, My window got stuck in the down mode (sod's law)- I pulled the panel and lifted it up (there is some life to the motor)- Do I need to secure the window in the up position if I r/r the window motor? What sort of grease is recommended? Thanks in advance, m Search the BW archives. I did this same EXACT thing on mine several months ago. I created a step-by-step on it. Chuck |
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1998 G320
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Window motor servicing
Thanks Chuck and Klaus,
The 30mm bolts worked well- as for taking apart the motor, it required a Torx (T25)- unlike Chuck, I could not open the motor to service the brushes (I don't have the part # on me- but it starts 460). I cleaned the electrical contacts, etc.
The window works somewhat, but it seems to get stuck in the up position - I have 2 questions:
1) is there a mechanism / stopper that is supposed to make it stop when it reaches the top? What shuts the motor off?
2) window alignment- is there a way to make sure it is bolted in the right position (there is a few mm adjustment when you tighten the bolts.)
thanks,
m
 (door2.jpg)
 (door3.jpg)
Attachments
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 door2.jpg (51KB - 8 downloads)
door3.jpg (52KB - 8 downloads)
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Braingears
Expert
Date registered: Apr 2006
Location: St Petersburg, FL
Vehicle(s): G320 & ML320
Posts: 1450
| Re: Window motor servicing
There is no "switch" that I know of that stops the motor once it reaches the top.
Once the window is rolled all of the way up, I loosened the bolts, pushed everything snug, then re-tightned the bolts. That was the alignment.
Attachments
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Front Window Motor.pdf (117KB - 13 downloads)
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1998 G320
Date registered: Dec 1899
Location:
Vehicle(s):
| Re: Window motor servicing
The window seems to function now, but it sometimes will stick closed and then work later- I think whatever safety device cuts off power when you try to crush your arm in the window is kicking in- as if the motor thinks the top of the window was reached early-
Chuck, on the BW forum you refer to cleaning the brushes on the motor- did you take apart the magnet / brushes? How did you remove it from the housing? (by bending back the electrical contacts?)
m
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Braingears
Expert
Date registered: Apr 2006
Location: St Petersburg, FL
Vehicle(s): G320 & ML320
Posts: 1450
| Re: Window motor servicing
1998 G320 - 6/18/2006 10:39 PM The window seems to function now, but it sometimes will stick closed and then work later- I think whatever safety device cuts off power when you try to crush your arm in the window is kicking in- as if the motor thinks the top of the window was reached early- Chuck, on the BW forum you refer to cleaning the brushes on the motor- did you take apart the magnet / brushes? How did you remove it from the housing? (by bending back the electrical contacts?) m In order to remove the motor from the other housing, you have to remove the two screws, then rotate the motor in a counter-clockwise rotation while pulling the motor out. The gear will actually allow the motor to be removed from the gear housing. At the top of the motor, there is a plastic face. That plastic portion, along with the actual shaft of the motor can be removed from the actual motor housing. The inside of mine was filled with junk. Once apart, I was able to clean and greese everything. I also greased all of the cables and gears. |
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ewalberg
Expert
Date registered: Apr 2006
Location: Past: San Francisco. Present: Germany
Vehicle(s): 2000 g500
Posts: 1887
| Re: Window motor servicing
A trick you might be able to employ to clean it out is to spray it with brake cleaner while running... you can infact run DC electric motors totally submerged in brake cleaner (its a trick i learned when i played with Radio Controlled Cars as a kid) to clean them. |
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Braingears
Expert
Date registered: Apr 2006
Location: St Petersburg, FL
Vehicle(s): G320 & ML320
Posts: 1450
| Re: Window motor servicing
I DO NOT recommend brake fluid anywhere near the car.
It is too corrosive! It will wipe the paint right off the car!
I personally recommend Electrical Contact Cleaner |
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1998 G320
Date registered: Dec 1899
Location:
Vehicle(s):
| Re: Window motor servicing
In order to remove the motor from the other housing, you have to remove the two screws, then rotate the motor in a counter-clockwise rotation while pulling the motor out. The gear will actually allow the motor to be removed from the gear housing. At the top of the motor, there is a plastic face. That plastic portion, along with the actual shaft of the motor can be removed from the actual motor housing. The inside of mine was filled with junk. Once apart, I was able to clean and greese everything. I also greased all of the cables and gears.
I was able to get the motor apart, but I couldn't get the shaft out- it seemed like I would have to bend 2 metal clips (which attached to the plug) in order to pull the plastic face out- There was some junk-
On the cleaner / lubrication front - how about silicone cleaner? is that bad for electronics?
Thanks again,
m
Edited by 1998 G320 6/20/2006 7:11 AM
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Braingears
Expert
Date registered: Apr 2006
Location: St Petersburg, FL
Vehicle(s): G320 & ML320
Posts: 1450
| Re: Window motor servicing
I would not use silicone. It does not last long enough and seems to "gum up". I would recommend graphite grease, or even same grease that you use for the wheel bearings. You do not want to use anything on the inside of the motor, just a touch where the shaft touches the bushings and a lot more along the spiral gear.
For the electronics cleaner, use electric contact cleaner (I prefer the quick drying type). You can get it a any corner car parts store. |
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