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Mineral oil discontinued?!

Eddie_6505
Posts: 82
Joined: Thu Jan 21, 2016 9:38 pm

Re: Mineral oil discontinued?!

Postby Eddie_6505 » Thu Jun 29, 2017 11:19 pm

naki_k wrote:
Eddie_6505 wrote:I had the pressure switches replaced last year so they're fine. I cleaned off around the reservior and can see fluid leaking out from under the cap after driving so I've tightened that up to see if it improves things. Not sure if anyone else has experienced a similar problem?


If it's coming out of the top of the cap, its maybe slightly over filled. And no, there is no sure fire way to know when it's correctly filled, other than it doesn't come out of the cap.
The little sight glass and plunger affair onto, is not really accurate at all.
So it's best guess, followed by mop up with rag/ top up bit by bit.
As long as it's not leaking anywhere else, then you are good to go.
Where did you buy the pressure switches? SNGB?


Funnily enough I did wonder if it was becasue I was over filling it. My only reservation with that is that quite a lot leaked out and surely I couldn't be overfilling it that much :lol: . And it was coming out beneath the black cap not the little viewing window. Reading through a few old threads too I read that the sls stops working if the pressure is below a certain amount so I assumed that I was losing pressure in the reservoir? I've only ever noticed the suspension rise up once and go back down so it's possible that it's just not working at all. All fun and games. I've never driven another 40 so don't really have anything to compare the brakes to either.

I had originally got a pressure switch from SNGB but it didn't solve my problem so ended up taking it to a Jaguar specialist near me who managed to get some NOS switches for a very reasonable price. No idea where he got them from and he didn't seem to be able to get anymore unfortunately. He also had a very cool looking 40 track car for the historic racing series so is clearly a bit of a fan
1988 Daimler 3.6

naki_k
Super Moderator
Posts: 28671
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Mineral oil discontinued?!

Postby naki_k » Sat Jul 01, 2017 1:33 pm

Ah yes, I remember we emailed about the switches now.
You were really lucky to find those NOS ones!

Supposedly the way to "test" the SLS.
Put something heavy on the boot, and see if it raises to correct the changed ride height.
Simple really.
Easiest is to get in the boot yourself! Feel the power?
If it doesn't raise, then technically it's not fully working. Whether it performs satisfactory enough to continue using it is up to you?
Last edited by naki_k on Thu Nov 02, 2017 12:37 pm, edited 1 time in total.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

Per
Posts: 85
Joined: Thu Jan 01, 2015 7:50 pm

Re: Mineral oil discontinued?!

Postby Per » Thu Nov 02, 2017 8:25 am

Eddie_6505 wrote:
naki_k wrote:
Funnily enough I did wonder if it was becasue I was over filling it. My only reservation with that is that quite a lot leaked out and surely I couldn't be overfilling it that much :lol: . And it was coming out beneath the black cap not the little viewing window. Reading through a few old threads too I read that the sls stops working if the pressure is below a certain amount so I assumed that I was losing pressure in the reservoir? I've only ever noticed the suspension rise up once and go back down so it's possible that it's just not working at all. All fun and games. I've never driven another 40 so don't really have anything to compare the brakes to either.

I had originally got a pressure switch from SNGB but it didn't solve my problem so ended up taking it to a Jaguar specialist near me who managed to get some NOS switches for a very reasonable price. No idea where he got them from and he didn't seem to be able to get anymore unfortunately. He also had a very cool looking 40 track car for the historic racing series so is clearly a bit of a fan


Sounds like a mix up here? The system has two circuits: One is the pressure circuit (shared with the self levelling for those cars that has/had this) which uses the Citroen LHM green fluid. Then there is the actual rack circuit which uses Dex III gear fluid (or ordinary power steering fluid if you will). The black reservoir with the LH thread cap is for Dex III ONLY, while the reservoir with the sight glass is for LHM ONLY. BTW, keep one of the original Jag bottles as the non-Jag bottles do not come with the special nozzle. I bought the LHM cheaply through the local equivalen of Halfords. If you have mixed the fluids, drain and flush both with correct fluids and then refill again with correct fluids.
1989 3.6 Sovereign

naki_k
Super Moderator
Posts: 28671
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Mineral oil discontinued?!

Postby naki_k » Thu Nov 02, 2017 12:40 pm

Yet strangely for the 90-92MY, they made one tank only for the PS and SLS. Both using HSMO. I think the rack is ok on either fluid type.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300