Hardtop hydraulic lines

L

LordLolzeye

Member
I have a question regarding the hydraulic lines, if it was discussed before please forgive me for my repost.

I've read that in 2012 they've changed the pump and the hydraulic lines to feature one more hydraulic line. Everybody says that, but why? What is the difference in the way the lines go through the roof? Where can you see that new line? Where does it go?

Does it go to a hall sensor which was previously linked to a main line and now has it's own, dedicated line?

Rob
 
The pump was changed in 2012 to supply more hydraulic force, enabling roof operation at higher speeds :thumbsup:
Rob
 
I don't believe this was the case since the CTM had the option to enable roof operation at higher speeds starting from 2009, it was just disabled. That means they probably tested it but decided not to enable it on mass production. I believe they've seen a possible future problem with the hydraulic lines (maybe generates low pressure) in some cases thus deciding to add 1 more hydraulic line.

So, the question still stands - does anyone know why they decided to go for 4 hydraulic lines instead of 3? Is one going to a separate hall sensor?

Rob
 
LordLolzeye said:
So, the question still stands - does anyone know why they decided to go for 4 hydraulic lines instead of 3? Is one going to a separate hall sensor?
Click to expand...
Nonsense!
Everything was already said by @smartbear. But you must not believe it.

And in addition, what kind of relationship between a hydraulic hose and a hall sensor did you read about? Go back and check your source of "knowledge". :D
 
I understand now, but mechanically, where does that line go, what did they do with it? That is what i'm trying to understand.

Rob
 
LordLolzeye said:
I've read that in 2012 they've changed the pump and the hydraulic lines to feature one more hydraulic line. Everybody says that, but why? What is the difference in the way the lines go through the roof? Where can you see that new line? Where does it go?
Click to expand...

RobbiZ4 said:
LordLolzeye said:
Everybody says that,
Click to expand...
Who is "Everybody"? Not @smartbear and not me. :D

Check your sources.
Click to expand...

I've read some posts about this change and I believe you've seen them too.
 
I understood what @smartbear said, but again, I am trying to understand

LordLolzeye said:
I understand now, but mechanically, where does that line go, what did they do with it? That is what i'm trying to understand.

Rob
Click to expand...

I am trying to understand the mechanical reason they required the additional hydraulic pressure, where was that pressure needed? Where did they route the new hydraulic line?
 
Smartbear said:
The pump was changed in 2012 to supply more hydraulic force, enabling roof operation at higher speeds :thumbsup:
Click to expand...

LordLolzeye said:
the CTM had the option to enable roof operation at higher speeds starting from 2009, it was just disabled. That means they probably tested it but decided not to enable it on mass production. I believe they've seen a possible future problem with the hydraulic lines.
Click to expand...

Is the answer not in these?

Seems they had the ability to actuate it at higher speeds, but not enough hydraulic force to achieve it safely. Possibly too late to change for the initial production, so was scheduled for later upgrade?
By adding the extra output in 2012 they resolved this issue.

However, experience tells me I should defer to [ref]RobbiZ4[/ref], just in case. :wink:
 
Yep, I understood what @RobbiZ4 and @smartbear said, but where does the extra output go? Where did they route it? Where was the extra hydraulic force required? Did they route it to the right side of the roof or to the left side? Where did they couple it? Where was that force required, what was the weak point?

+edit
RobbiZ4 said:
A) he doesn't believe anybody
B) he's repeating his own myths :headbang:
Click to expand...

I believe you guys, but I think i'm not formulating the question well enough. I am not repeating my own myths, I am simply trying to understand the changes between the two roofs, the 2009-2012 and 2012-2016 models as I have two cars, one from 2011 and one from 2015.
 
OK, so after a PM(?) and re-reading the posts, it seems the issue is that the OP has heard the newer pumps have an extra outlet. Therefore it suggests there is an extra line from that outlet. The confusion seems more in understanding where the extra line goes to and what it operates when it gets there?
I think, as far as I can make out, that the OP follows the reason why it was needed, but not how it achieves that?

PS. I'm currently emailing the United Nations for one of those light blue peace keeping force berets. :D
 
enuff_zed said:
OK, so after a PM(?) and re-reading the posts, it seems the issue is that the OP has heard the newer pumps have an extra outlet. Therefore it suggests there is an extra line from that outlet. The confusion seems more in understanding where the extra line goes to and what it operates when it gets there?
I think, as far as I can make out, that the OP follows the reason why it was needed, but not how it achieves that?

PS. I'm currently emailing the United Nations for one of those light blue peace keeping force berets. :D
Click to expand...

Yes, thanks! I've read that CTM's from newer models (2012-2016) cannot fit older models (2009-2011), and also that both the pump and the hydraulic lines are different on those models (for example hydraulic lines part no. 54377229318 was supersedded by part no. 54377311084, same for hydraulic unit - 54377220798 vs 54377309634), as for the hydraulic lines (3 vs 4 lines) am I wrong? - I have no ideea, I am just trying to understand.
 
RobbiZ4 said:
:rofl:
LordLolzeye said:
Yes, thanks! I've read that CTM's from newer models (2012-2016) cannot fit older models (2009-2011), and also that both the pump and the hydraulic lines are different on those models (for example hydraulic lines part no. 54377229318 was supersedded by part no. 54377311084, same for hydraulic unit - 54377220798 vs 54377309634), as for the hydraulic lines (3 vs 4 lines) am I wrong? - I have no ideea, I am just trying to understand.
Click to expand...
Where did you read what?

Links, links, links!

- the pump has changed, a 4th solenoid was added
- the loom(!) has changed, 2 wires were added to the pump
- the software in the CTM has changed
- No hoses were changed or added
Click to expand...

Thanks, this was what I was after! Sorry for the misunderstanding before. As for where I read what, I have no ideea, i've opened up so many forums trying to find these details that I can't even tell. I've found posts on zroadster, i've found posts from others on zpost, some here, etc. but none gave these informations I was after.

I was trying to find out the differences between those two cars. As I said, I am trying to learn, as you probably remember our discussions from last year when I've had some issues with the wires I am thinking of the future of my car, I am trying to assimilate some knowledge so I can, at least understand, what somebody else is "fixing" to my car.
 
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Why do you re-post this nonsense? All regarding the changes was posted before. There were never ever more than 2x6 hoses in the Z4 E89. :?






:P Psssssst: but you will find some E89 with 2x 6 plus (2 or 4) non-used hoses in the boot, when the main loom already got replaced. :rofl:
 
No, no, no,.... :rofl:
Each change from about 03/2012 was listed before, but nothing has changed on the hoses.
 
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