I was able to take some out and noticed it's got a red tint to it, so it's apparently not the same as the synthetic green in my xk8, does anyone have any idea what it is? I've heard 5606A or B, or Royco 756.....?

 

This Thread may be of interest:

https://www.jaguarforums.com/forum/x...acement-68218/

https://www.amazon.co.uk/febi-bilste...rds=Febi+02615


I've got the same problem on my XJS Soft Top

and was thinking of using Febi 02615

Hopefully PTJS will Chime in and give me the 'Thumbs Up' on Febi 02615 (or not)

 

sirreginald,

If your fluid has a red tint then it sounds like the original spec fluid which is (was) Univis J13. This is quite different from the green fluid in your XK8 which may be Pentosil CHF11S (a synthetic fluid).

Univis J13 is a mineral hydraulic fluid with a very High VI of 364. It's commonly referred to as MIL-H-5606A (which I think is now an obsolete spec). The compatibility charts seem to indicate that Royco 756 is compatible.

I would be quite careful about what fluid you buy. Just a personal view but I would use a similar compatible mineral fluid. If you do use a synthetic fluid, I would do a complete flush first (which can be a real pain).

To answer OB's comment about Febi 02615, I think this is a fluid that Mercedes use and is oft referred to as ZH-M fluid. I have read somewhere that it is compatible with Univis J13 but I'm not entirely sure as I can't find its full spec. However, I do know that it's coloured yellow so, just a personal view, I wouldn't mix it with the red Univis J13 fluid.

I hope that helps somewhat.

Paul

 

yeah I was. I do have a bottle of the pentosil that my jag shop gave me to top off my xk8's system, probably enough to fill the xjs, so I am thinking about replacing the fluid as it's been in there almost 25 years. my jag shop guy told me to take out the plug, drain the fluid (somehow, not sure how to do that, have to suck it out I guess somehow), open the relief valve, lift the top 2 or 3 times to get the rest back out into the tank, then fill with the green, close the valve, operate the top 2 or 3 times electrically, then top off the tank. my guess is there will still be some of the old which will mix in with the new unless some sort of cleaner/solvent is flushed through the lines first. is that an issue, i.e. if some of the old gets mixed in with the new, say, 2% or so of the old left coating the inside components?

 

btw, am I the only xjs driver that sought fit to chuck the queen mary size straight six for a small block chevy? i don't know about your guys 12 cylinders, although they're incredibly smooth, but it's been a decent improvement on mine. i actually went with a roller cam 305 as opposed to the 350. thought it was more fitting in line with the European style small displacements, but the best thing about it, was not having to change the springs as the six and eight are about the same weight, and the 3:54 rear end gears on the six's. worked out great, british hot rod.

 

sirreginald,

Unlike the problems experienced by many xk8 owners with congealing fluid in the latches, the XJS was never known to experience problems because of the fluid, There are a number of people who subscribe to the theory of not running substitutes when it comes to hydraulic fluids or ever mixing composition types. The Univis j13 has not been known to have any real problems, so I would stick with it. The fluid used in the XJS roof almost never gets contaminated and has a fairly easy time. If for some reason, it needs topping up, then it's leaking somewhere and changing the fluid won't cure that.

Good luck

Paul

 

Hi Paul Cheers

I'm having a problem finding Univys J13 or is it Univis J13?

Can you buy this in motor accessory shops, or is it a Specialised thing.

Have you got a link you could please give me.

My Hydraulic Top Fluid is definitely the 'Pink' Stuff.

 

yeah, my question, too. i'm finding about 4 different red/pink fluids listed, which can I find and use. and I don't think mine is leaking, just above the minimum line, wanted to top it off a bit. if you think it's not too old, and needs to be changed after 24 years, i'll leave it alone.

 

OB,

This type of oil has a very high viscosity index and has much more application in the aircraft industry. I might be wrong but I don't think you're going to find it in any motorcraft stores here in the UK.

I wouldn't wish to mislead you but I THINK I'd be happy with any of the following:

Esso / Mobil Univis J13
Mobil Aero HF (maybe also Mobil Aero HFA)
Castrol Brayco 756

From the MSDS sheets, I think that Esso / Mobil Univis HVI 13 seems to have the same spec also.

Another issue is that being an aircraft oil, it's all probably usually sold in largish quantities. So probably time to try Google & Ebay for an answer.

The obvious thing is to ring your Jaguar Dealer plus all the usual Jaguar Independent Specialists and ask them what they suggest. Then see if there's any consensus and if any of them will sell you a small amount.

Good luck

Paul

 

Hi Paul

Thanks for your help but I'm finding it hard to track down a supplier

Nothing on ebay or Amazon from what I can see.

 

Buy Castrol Brayco Micronic 756 - Hydraulic Fluid, Petroleum Base Aircraft, Missile, - Kernow Oils


or maybe go down to your local airport in the XJS and blag a few pints?
Greg

 

Hi Greg

Thanks Good idea!

 

OB,

I'd defo ring your dealer plus all the usual specialist independents. They must have stock or access to such fluid unless they always recommend flush and alternative fluid. So, if they do have stock, they should be prepared to sell you an amount.

I'll give my dealer a ring and see what they say.

Good luck

Paul

 

Hi Paul

Although I've managed to find some 'Sort of' I'm getting quotes around £50 for 5L which is a bit OTT for the quantity I need, so if you manage to find some let me know.