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Thread: power steering box lube

  1. #1
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    power steering box lube

    so after a fair bit of research can anyone tell me if standard power steering fluid (90) is what your meant to fill a steering box with as i have been reading up and theres a strong case for steering box lube
    which is a type of grease and would explain why they all leak with fluid in.
    there must be people on here that have the burman box (what do you use)

  2. #2
    Senior Member XJ for two's Avatar
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    I have a 1965 3.8 'S' with factory steering power assist, and I use power steering fluid,
    not grease.

    It leaks like crazy. I have no clue if it is a Burman or a German.

    I could also use transmission fluid for Ford transmissions, or Type FA. but I tried
    anti-leak power steering fluid, but no luck stopping the leak.

    Contrary to my 1984 XJ-6 which has the factory Saginaw power steering pump and rack which has remained dry
    for 30 years of ownership.
    1965 Jaguar 3.8 'S'
    1984 Jaguar XJ-6 4.2

  3. #3
    Senior Member cass3958's Avatar
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    The Buman box which was used as a Type one and Type two up until about 1967 uses standard PAS fluid. When new all the seals were soft and there would have been no leaks. As the seals get older and with the movement in the box they wear. Think of them being a 50 year old suspension bush, distorted and worn. Hence the leaking as they just do not fit anymore. No amount of anti leak fluid is going to stop the leak. The Burman box works by pressurizing the fluid so if you can imagine a hose pipe with a hole in it then put a bit of vaseline over the hole that is what you get inside the PAS box. If you put steering grease in the box it will still come out, it just will not drip onto the floor and if you ever had it rebuilt the builder would hate you for it. But I am not sure the grease would work in this system as there is a reservoir of oil with a feed pipe going to the pump , then to the box and a relief pipe which returns to the reservoir. There is obviously a flow of fluid around the circuit and I do not think grease would flow the same way.

    The only solution I am afraid is to rebuild the box with new seals. The Burman box is quite complex as it has a lot of ball bearings of different sizes which alternate on the rings. there are a lot of moving parts which wear out so although a competent mechanic with the right seal kit could refurbish it you are possibly better off sending it off to a specialist to have it rebuilt.
    You have no location on your details so I cannot recommend anyone local to you but there is ICS Steering specialists in Birmingham UK http://www.ics-steeringspecialist.co.uk who are one of the recommended services on the S Type Jaguar Forum.
    We have also been discussing the Burman box rebuild on another Jaguar forum with a lot of details and diagrams if you would like to view it at https://www.jaguarforums.com/forum/m...ng-box-234129/
    Rob.C.
    1968 Jaguar S Type 3.4 Auto Old English white
    2006 X type SE 2.0d Estate
    1966 Ford Anglia 1760 X flow
    1993 Yamaha FJ1200
    2012 Old English Sheep Dog White and Grey

  4. #4
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    Quote Originally Posted by cass3958 View Post
    The Buman box which was used as a Type one and Type two up until about 1967 uses standard PAS fluid. When new all the seals were soft and there would have been no leaks. As the seals get older and with the movement in the box they wear. Think of them being a 50 year old suspension bush, distorted and worn. Hence the leaking as they just do not fit anymore. No amount of anti leak fluid is going to stop the leak. The Burman box works by pressurizing the fluid so if you can imagine a hose pipe with a hole in it then put a bit of vaseline over the hole that is what you get inside the PAS box. If you put steering grease in the box it will still come out, it just will not drip onto the floor and if you ever had it rebuilt the builder would hate you for it. But I am not sure the grease would work in this system as there is a reservoir of oil with a feed pipe going to the pump , then to the box and a relief pipe which returns to the reservoir. There is obviously a flow of fluid around the circuit and I do not think grease would flow the same way.

    The only solution I am afraid is to rebuild the box with new seals. The Burman box is quite complex as it has a lot of ball bearings of different sizes which alternate on the rings. there are a lot of moving parts which wear out so although a competent mechanic with the right seal kit could refurbish it you are possibly better off sending it off to a specialist to have it rebuilt.
    You have no location on your details so I cannot recommend anyone local to you but there is ICS Steering specialists in Birmingham UK http://www.ics-steeringspecialist.co.uk who are one of the recommended services on the S Type Jaguar Forum.
    We have also been discussing the Burman box rebuild on another Jaguar forum with a lot of details and diagrams if you would like to view it at https://www.jaguarforums.com/forum/m...ng-box-234129/

    very intresting ive spoken to ICS and they put the semi fluid grease in all there manual power steering boxes
    i have allready replaced all the main seals but the leak is coming from the torsion bar input spline and i believed it was unserviceable but am going to take the spare apart at work with the power press.
    IT WILL NOT WIN
    LOL

  5. #5
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    Thanks for the reply
    ICS say they use the semi fluid grease in all manual power steering boxes and thats why i asked the question
    the issue i have is that the fluid is leaking from the torsion bar that is part of the input shaft from steering colum but the drawing i have NOW just seen shows 2 o rings on it so ill dismantle and take it apart again ,i replaced all other seals but will rebuild the whole thing again.
    IT WILL NOT BEAT ME LOL


    Quote Originally Posted by cass3958 View Post
    The Buman box which was used as a Type one and Type two up until about 1967 uses standard PAS fluid. When new all the seals were soft and there would have been no leaks. As the seals get older and with the movement in the box they wear. Think of them being a 50 year old suspension bush, distorted and worn. Hence the leaking as they just do not fit anymore. No amount of anti leak fluid is going to stop the leak. The Burman box works by pressurizing the fluid so if you can imagine a hose pipe with a hole in it then put a bit of vaseline over the hole that is what you get inside the PAS box. If you put steering grease in the box it will still come out, it just will not drip onto the floor and if you ever had it rebuilt the builder would hate you for it. But I am not sure the grease would work in this system as there is a reservoir of oil with a feed pipe going to the pump , then to the box and a relief pipe which returns to the reservoir. There is obviously a flow of fluid around the circuit and I do not think grease would flow the same way.

    The only solution I am afraid is to rebuild the box with new seals. The Burman box is quite complex as it has a lot of ball bearings of different sizes which alternate on the rings. there are a lot of moving parts which wear out so although a competent mechanic with the right seal kit could refurbish it you are possibly better off sending it off to a specialist to have it rebuilt.
    You have no location on your details so I cannot recommend anyone local to you but there is ICS Steering specialists in Birmingham UK http://www.ics-steeringspecialist.co.uk who are one of the recommended services on the S Type Jaguar Forum.
    We have also been discussing the Burman box rebuild on another Jaguar forum with a lot of details and diagrams if you would like to view it at https://www.jaguarforums.com/forum/m...ng-box-234129/

  6. #6
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    Temp repair is to add a teaspoon full of break fluid. it can soften and expand the seals for a while.
    Jaguar Keys & Remotes
    Castle Locks
    196 London Rd
    Hadleigh
    Essex
    SS7 2PD

    07792 552423
    01702 555557
    castle.locks@btinternet.com

  7. #7
    Senior Member cass3958's Avatar
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    Problem with the brake fluid trick is as you said "for a while". The brake fluid does soften the seals but the softening process is part of the brake fluid destroying the rubber content of the seal. Try taking a rubber seal and put it in a jar of brake fluid over night. You would be lucky to be able to take the soft bloated seal out in one piece in the morning. I appreciate it is not the same as a teaspoon full of brake fluid in a large amount of steering fluid but what is likely to happen over time is that every rubber seal in your PAS system from the pump to the box will start to leak as the seal rubbers get too soft.
    Best to bite the bullet and send it off to a specialist for a complete rebuild with new seals all round and a leak free guarantee.
    Rob.C.
    1968 Jaguar S Type 3.4 Auto Old English white
    2006 X type SE 2.0d Estate
    1966 Ford Anglia 1760 X flow
    1993 Yamaha FJ1200
    2012 Old English Sheep Dog White and Grey

  8. #8
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    Not ideal but I've had an extra 5K miles out of an autobox on an econoline van.
    As said "a temp repair".
    Jaguar Keys & Remotes
    Castle Locks
    196 London Rd
    Hadleigh
    Essex
    SS7 2PD

    07792 552423
    01702 555557
    castle.locks@btinternet.com

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