Central Locking Vacuum Pump

[JoeGons]

Hi,
I’m trying to replace the motor for the Central Locking Vacuum Pump on my 2001 E320 W210.
Does anyone have any ides the Specs on the pump?
I need to know what RPM the Motor in these Rotary type pumps operate at.
Need to find a replacement.
Thanks,
Joe

BTW If I get it to work, I’ll post how I did it.

 

[television]

Welcome to the forum. Have you opened it up yet and tested anything

 

[JoeGons]

Hi Malcolm,
Yes, I have opened it up and the motor is burnt to a crisp.
I guess there is a leak and it just ran itself out.
It requires a "Back-pressure" to cut off.
Mercedes will not sell you the motor by itself so I need to find one.
The problem is that I don't want to use one that either will not spin fast enough to work or will spin too fast and shorten the life of the "Rotary pump".
I have heard that it can be done but those in the know will not part with that information.
Joe

 

[television]

Hi Malcolm,
Yes, I have opened it up and the motor is burnt to a crisp.
I guess there is a leak and it just ran itself out.
It requires a "Back-pressure" to cut off.
Mercedes will not sell you the motor by itself so I need to find one.
The problem is that I don't want to use one that either will not spin fast enough to work or will spin too fast and shorten the life of the "Rotary pump".
I have heard that it can be done but those in the know will not part with that information.
Joe

Most of these things run at 1400 rpm why not use one from a tyre pump

Earlier versions had a time switch if the bellows failed

 

[JoeGons]

Hmmmm.
Thanks Malcolm.
The motors I had in mind spin at 3000RPM or 6000 RPM.
I am not sure a simple diaphragm type pump will work. I believe the rotary pump “reverses” to create pressure/vacuum.
If I can find a tyre pump that uses a rotary pump, it may work.
The older OEM diaphragm pumps have a complicated mechanical switching mechanism that does the reversing process when it reaches the required vacuum/pressure after the doors are locked/opened.
A tyre pump will not have that. Also, the valves in a tyre pump will probably be non reversible.

Joe

 

[television]

I have some old ones here, so I know how they work, how is the motor fixed to the pump on yours, or coupled

 

[JoeGons]

This is the Pump.
The Motor is 65mm long and 35mm in diameter

Joe

 

[television]

Can you send me a PM

 

[JoeGons]

Hi Malcolm,
I would but you have PMs blocked or not allowed in your Options.
PM me with your Email.
Joe

 

[television]

Email sent.

 

[JoeGons]

Got it.
I have responded.
Thanks
Joe

 

[paulhandley]

I Have a 124 estate, my locking doesnt work either, is it likely to be my pump too?

 

[Vladalv]

central locking pump

Hello everyone
I have a problem
I have a 97 e290 w210
The problem is that the central locking pump works all the time

The opening and closing the car run smoothly
when you give a contact central locking pump starts to work all the time

Help Pls

 

[Dec]

Remove its fues or disconect its power supply at the pump immedatley and lock the car manually for now.

Dec

 

[JoeGons]

If the pump is running for more than 10 seconds, it is more than likely that there is a leak in the vacuum system and the pump motor will burn out.
If you find the fuse, it's a 25A fuse under the rear seat, remove it or else disconnect the Vacuum Unit under the rear seat.

 

[JoeGons]

In my case, the motor ran until the cooling fan in the motor melted and seized the whole thing up, blowing the fuse.
I had to dig out the melted fan to free the armature.
Once that was done I put it back together and it’s been working ever since.
I reasoned that since the motor only ran for a few seconds at a time, it would not miss the fan.


See this:

http://www.benzworld.org/forums/w210-e-class/1334999-central-locking-vacuum-pump.html

 

[Vladalv]

Thanks JoeGons for rapid response

This is the second motor in the pump
first burned
Second thing that I noticed is i must hold the windows buttons all the time to close

 

[JoeGons]

Sounds like it could be a door actuator.
There is no easy way to find a leak.
Disconnect the pump.
If the pump is working, you can remove the hoses one by one, and block the applicable hole on the pump unit, reconnect the pump and see if the pump cuts off.
You get the idea.
When you find the culprit, you can leave it out (block the hole) until a fix can be arranged. A short piece of tubing, pinched at the open end, will do the trick.
It could be anything from a loose or leaky hose to a faulty actuator

 

[Dec]

Do all the doors, boot and fuel filler flap lock at the same time? or does any one of them take a bit longer than the others to lock?

Do all the doors, boot and fuel filler flap unlock at the same time? or does any one of them take a bit longer than the others to unlock?

Dec

 

[television]

Apart from the locking one should not overlook the orthopaedic front seat (backrest)

When all good and no leaks the pump should cut within a few seconds, if it takes 18 seconds to cut then you have a leak
The car is here
http://www.auto-parts.spb.ru/cat/ca...95851515f4876487ddfd0c78ec0fdfbccc1d6dcdfb284



This is the seats

http://www.auto-parts.spb.ru/cat/ca...8a9a0a0ae99a799aceee1f6bf91acaa9db0a7adaee3d5