I’ve seen a number of posts relating to the hydraulic system, but
how do I identify the HSMO against ATF? My fluid is a bright yellow
oil, so I am guessing it’s HSMO (1990 XJ40)?
I understand that I can drain a couple of times and refil with ATF,
but if I can get hold of HSMO am I better sticking with it? At the
moment I don’t think I have SLS but I’ll check soon.
The reservoir oil level is a little low so I want to top-up, but I
think I’d rather stay with HSMO if I can rather than change - after
all, if it ain’t bust don’t try to fix it?–
Str8-6
Sheffield, South Yorkshire, United Kingdom
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In reply to a message from Str8-6 sent Mon 17 Aug 2009:
Richard,
If you are referring to the combined Power Hydraulics /
Power Steering HSMO reservoir on your '90, providing you no
longer have SLS (and, preferably, if you have also removed
the therefore redundant Power Hydraulics hardware and
plumbing) you can use either HSMO for the remaining Power
Steering or can drain it and switch to ATF.
In my case, after removing all the aforementioned junk, I
continue to use HSMO for the Power Steering because there is
nothing left which is susceptible to leakage as was that
‘plumber’s nightmare’ Power Hydraulic system. With only the
Power steering using the HSMO, you should never need to top
up that reservoir above the ‘Y’ mark on the dipstick.
The important thing is that the Power Steering pump, rack
and plumbing is perfectly happy with either fluid - in fact
all the part numbers are the same.
HSMO is the greeny/yellow stuff. ATF is pink.–
The original message included these comments:
I’ve seen a number of posts relating to the hydraulic system, but
how do I identify the HSMO against ATF? My fluid is a bright yellow
oil, so I am guessing it’s HSMO (1990 XJ40)?
I understand that I can drain a couple of times and refil with ATF,
but if I can get hold of HSMO am I better sticking with it? At the
moment I don’t think I have SLS but I’ll check soon.
The reservoir oil level is a little low so I want to top-up, but I
think I’d rather stay with HSMO if I can rather than change - after
all, if it ain’t bust don’t try to fix it?
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Bryan N sent Mon 17 Aug 2009:
Any idea how much HSMO/LHM is needed for the system bith
with and without the SLS system?
I’ve looked through the manuals and can’t find any reference
to the capacity.–
1990 XJ6 4L Soverign auto on LPG
Wolverhampton west mids, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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–
Jim Isbell
“If you are not living on the edge, well then,
you are just taking up too much space.”
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In reply to a message from Richard Moss sent Mon 17 Aug 2009:
No-one have any idea? Even a guestimate would be a help - I
don’t want to buy 5 litres if it takes just 2 but also don’t
want to end up buying 5 individual (expensive) 1 litre
bottles if I guess at 2 and it turns out to be 5 litres!–
The original message included these comments:
Any idea how much HSMO/LHM is needed for the system bith
with and without the SLS system?
I’ve looked through the manuals and can’t find any reference
to the capacity.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Richard Moss sent Wed 26 Aug 2009:
If your car has the electric brake pump with black accumulator then
remove the pressure pump from the front of the engine, install a
short res to pump hose and use ATF. If you need the 3 piston pump
for your brake system then you already have a small black reservoir
that uses ATF.
bob gauff–
The original message included these comments:
No-one have any idea? Even a guestimate would be a help - I
don’t want to buy 5 litres if it takes just 2 but also don’t
want to end up buying 5 individual (expensive) 1 litre
bottles if I guess at 2 and it turns out to be 5 litres!
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Sadly I couldn’t find the HSMO system capacity in August 2009 and I can’t find it now.
IIRC, I just bought the ‘standard’ Castrol Jaguar HSMO refill bottleof 500ml but I only needed to top up - not refill.
Thanks for the reply’s, the pictures manual doesn’t show capacity for the hsmo! My car is a 1991 xj6 with vin being 64058. It came from factory with SLS but got converted to conventional springs in 2014. The tank is currently filled with green/yellow stuff which I assume is hsmo but is very low. I figure I just drain and refill with new hsmo but don’t want to buy too little or too much of it from online.
The reason I want to stick with hsmo is because from searching I hear regular ps fluid will cause the seals in the steering rack to leak. Please advise otherwise.
Sorry David, i’m not following what you mean “bottom left” ??
HSMO is Hydraulic System Mineral Oil. on my 1991 there was one reservoir that fed the SLS and steering rack, from factory it was filled with HSMO. From what I read I hear conflicting things about the use of ATF in my XJ6 mainly the ATF causing the seals to leak. I believe your 89 XJ6 has two separate reservoirs for the SLS and the Power steering (ATF). Excuse me if any of this info is wrong, im still learning
I am always learnig also I habe 2 reservoirs one with the green tank for brake assist and a black one for power steering.y power steering locked up hard the other day but after forcing the wheel something popped and now it works, somer fluid came out of the cap but the level shows good now, maybe an overfill but works so I don’t have to fix it!
