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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 02-28-2016, 12:28 PM   #41
TopHydraulicsInc.com
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Hello Mike, welcome to the forum! taylor192 is correct, as always.

Quote:
Originally Posted by Mike.ellingson View Post
I had a hydraulic cylinder start to leak and I lost most of the hydraulic fluid. I pulled the cylinder out and had it rebuilt by Top Hydraulics(saved a ton over buying a new one). I refilled the fluid reservoir replaced the cylinder and reconnected everything. I tried to raise the top and it only when part way. I was expecting this, due to air in the lines. After a little back and forth, I manually assisted the operation and the top went completely up. However, after several attempts, I still have the issue with the top starting to work and then stopping. I know that there is hydraulic fluid in the pump. How many times will I have to attempt to lower the top before the air is bled out?
If there is enough fluid in the reservoir, then almost all air should be out of the cylinders after two or three of full cycles. Even if there still is some air in the system, the pump should be able to finish the cycle on its own, as long as there is enough fluid available.

Your pump's reservoir was probably almost empty by the time you noticed the leak from your right tonneau cover (storage lid) cylinder p/n 54348236956. That means the other cylinders had some air in them, just because the pump was sucking air before. If there was a lot of air in all cylinders, then the fluid level may have dropped low enough in your reservoir that the pump was sucking air again. The fluid level is the lowest when the top is up. The fluid level is the highest when the top is down and the tonneau cover is closed. It is not good to overfill the reservoir, that's why the fluid level is supposed to be checked with the top down.

If you currently have enough fluid in the reservoir, then the issue may be a failing pump or problems in the wiring, but let's not go there yet. Please clarify whether the fluid level in the reservoir is currently adequate, and exactly where in the opening or closing cycle you have to give top some manual assistance.

Klaus

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Some BMW E46 hydraulic cylinders, pumps, and valves that we rebuild and upgrade at Top Hydraulics:
54347025593
54347025600
54347025599
54348236956
54348243269
543454347025595 (hydro-unit, sticker p/n is 8234530)
54347025592 (control unit)
54347025598 (improved hoses manufactured at Top Hydraulics)
http://www.tophydraulicsinc.com/en/56-bmw-e46
www.tophydraulicsinc.com

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Old 03-01-2016, 02:13 PM   #42
Mike.ellingson
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I filled the reservoir before I put the system back together. Unfortunately, I replaced all of the trunk lining parts before I tested the top operation. The first time I tried it, the top was down and it raised over half way before I needed to assist it. The second time from the up position it also went about half way and then I assisted it down. The third time I put it back up but it did not get as far on it's own. Now, it starts to lift from the up position, but stops quickly. Is there a re sequencing that needs to be done after a cylinder has been replaced and the top has been manually lowered? Either in the electronics or the hydraulic system?
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Old 06-03-2016, 10:21 AM   #43
masCh
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Wait, so I have to put the top down before filling in hydraulic fluid?

I accidentally filled the fluid in the canister before attaching it to the solenoid hydraulics, did I break something?
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Old 02-03-2017, 06:58 PM   #44
Randall2314
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Top almost done but not quite

Hi all,

So we just got this E46 a few months ago and was told that the top wouldn't go down because it needs fluid. So I went to BMW got the required fluid and its full. So we tried the top and the top came up a little bit then the rear starting going up to and then it stopped. Now over a few minutes its let us close the top all the way until where its almost closed but the latches aren't catching the roof and the top light blinking red. What do we do? Can't really drive with the top with the gap and can we manually crank it? Thanks for the help. I read all the topics but not sure where to start. We did notice the fluid now looks brown (I saw someone else post this). Do we need to change the fluid and try that first? I dont think I saw where or how to change the fluid (and where do you put it in, drain and and add into the canister)?? Thanks in advance!
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Old 02-06-2017, 06:23 AM   #45
du80is
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Make sure your battery is fully charged and not too old.
I had a failing battery that even with the engine running it would display similar symptoms


Sent from my iPhone using E46Fanatics mobile app
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Old 02-22-2017, 08:12 PM   #46
Autoarcheologist
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Quote:
Originally Posted by Randall2314 View Post
Hi all,

So we just got this E46 a few months ago and was told that the top wouldn't go down because it needs fluid. So I went to BMW got the required fluid and its full. So we tried the top and the top came up a little bit then the rear starting going up to and then it stopped. Now over a few minutes its let us close the top all the way until where its almost closed but the latches aren't catching the roof and the top light blinking red. What do we do? Can't really drive with the top with the gap and can we manually crank it? Thanks for the help. I read all the topics but not sure where to start. We did notice the fluid now looks brown (I saw someone else post this). Do we need to change the fluid and try that first? I dont think I saw where or how to change the fluid (and where do you put it in, drain and and add into the canister)?? Thanks in advance!
Yes you can manually crank it closed.

Does the storage lid open up when you lower the top? That's where ours gets stuck and I'm trying to diagnose it. I'm thinking a switch isn't telling the top cylinders to start working.
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