XK8 / XKR ( X100 ) 1996 - 2006

reducing pressure in top hydraulics

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Old Dec 22, 2013 | 09:10 AM
  #1  
steelman3's Avatar
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Default reducing pressure in top hydraulics

Merry Christmas to everyone.
Yesterday it was warm enough in South Jersey to put my resistor fix in on the top motor.
I didn't want to attempt when cold and and risk cracking something.
I was unable to locate a resistor rated at 100 and .2.
What I found was two 50's with .1olm rating.
hooked up and the roof worked without the engine on, only the key turned.
It was slower but that is fine, although my daughter did comment on how slow compared to her 2012 Mazda Miata PRHT (power retractable hard top)
As an aside, my daughter asked me to explain what I was doing and why.
She then told me her boyfriends brother in law just had this happen (German version of the green shower) with his 2002 sl 500 Mercedes. My first thought was this kind of thing doesn't happen to well engineered German top shelf. I thought we were specially blessed.
 
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Old Dec 22, 2013 | 09:16 AM
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Try reading some of the Mercedes forums re the early SL cars - the folding roof gives problems! As with our Jaguars, the later the car the more mods the factory made to fix issues that became apparent during the production run .
 
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Old Dec 22, 2013 | 10:41 AM
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Originally Posted by batroute
Try reading some of the Mercedes forums re the early SL cars - the folding roof gives problems! As with our Jaguars, the later the car the more mods the factory made to fix issues that became apparent during the production run .

This is where I think Jaguar is really culpable. In 2006 they were still burping out cars with, it seems, about the same hose failure risk as 8 or 9 years earlier. They must have known something was wrong.

More than a little irony in the fact that the first year's hoses were better than anything used afterward.
 
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Old Dec 22, 2013 | 11:50 AM
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Bet Jaguar saved lots of pounds with that substitution by not only transferring to, but the profiting from the expense of repair to the owners.

. . . and they have never even acknowledged that there was a problem.

Shame on them!

I would say that I am so incensed that I would never buy another Jaguar convertible but I intend to keep this one to the end of my days.
 
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Old Dec 22, 2013 | 03:37 PM
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I hear what you are saying and yes Jaguar would have done the right thing if they just left the original hose selection alone and did not substitute them with an inferior product. However, was it Jaguar or was it supplier of the hydraulic system or a brilliant engineer. In either situation Jaguar is not the only one with this problem. From what I have been told and the list of replacement hydraulic parts listed on Top Hydraulics page we are not alone…

Link Top Hydraulics | Rebuilt and Upgraded Convertible Top Cylinders, Pumps, Hydraulic Lines - Top Hydraulics, Inc
 
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Old Dec 22, 2013 | 04:15 PM
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It is always a battle between the bean counters, engineers and marketing - a cynic would say a manufacturer wants the parts to just outlast the warranty period.
Twenty or so years ago I was a subcontractor to a very large car manufacturer and I remember after one meeting ended the talk turned to testing in general- they smiled faintly and said "You know...we can thrash a car around our Belgian cobble test track for 24hrs 7 days a week for a whole month and nothing falls off, then we release the model to the market and a 84yr old grandmother with arthritic hands goes down the shops and the gear stick comes off in her hand".
 
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