1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

Braking loss on laid up series landrover.

Discussion in 'Series Land Rovers' started by julianf, Apr 5, 2019.

< Previous Thread | Next Thread >
  1. julianf

    julianf Well-Known Member

    Joined:
    May 29, 2011
    Posts:
    1,688
    Likes Received:
    379
    Location:
    Devon, UK
    Ok, so ive not driven the 101 since last year.

    Started it up today, very first pulse of the key, so happy there.

    But one of the fluid reservoirs was empty - the front brake one.

    No peddle either.

    So i dig about for some DOT4, thinking ill top it up, pump away, and see whats leaking.


    I do just that, get a good peddle after a bit of pumping, top up the resevoir again, and go for a crawl about underneath. Nothing to see.

    Get back in the cab - reservoir now overflowing, and the peddle isnt there again. Pump it and it comes back after a bit, the level in the reservoir goes down, but then the same again. Looses peddle, fluid rises.



    Ive owned the truck about 20 years. Always the same master until about 3 or 4 years back, when i changed to one of those modified s3 ones (basically IIRC, so you can use the servo from the s3, but the modified cylinder is tapped to 101 thread)

    Im guessing this must be a master fault, rather than the pistons. Im also wondering why only the front brake reserve fell. Back system is still on the level.


    Any ideas?
     
  2. rob1miles

    rob1miles Well-Known Member

    Joined:
    Sep 22, 2017
    Posts:
    2,049
    Likes Received:
    660
    Location:
    Slough and Bath
    The first job is to find where its gone, could it be in the servo?
     
  3. j_g_uk

    j_g_uk Active Member

    Joined:
    Sep 14, 2017
    Posts:
    146
    Likes Received:
    70
    Location:
    Fareham
    Perhaps you pumped brake fluid through against the air pocket in the system and then when you stopped, the air pressure pushed it back into the master cylinder reservoir?
     
    tottot and Henry_b like this.
  4. j_g_uk

    j_g_uk Active Member

    Joined:
    Sep 14, 2017
    Posts:
    146
    Likes Received:
    70
    Location:
    Fareham
    If it’s been sitting there a while then the leak might be very slow and not immediately apparent? You didn’t bleed any if the brake cylinder?
     
  5. julianf

    julianf Well-Known Member

    Joined:
    May 29, 2011
    Posts:
    1,688
    Likes Received:
    379
    Location:
    Devon, UK
    I've ordered a new master, as, the way I figure it -

    If I pump to get a firm peddle and then press and hold the peddle, it's firm, then fades quickly whilst the level rises.

    So its got to be the master. If it was anything else then I might get fade, but the level wouldnt rise again.

    Where the fluid went though, who knows. It's not leaking now though. As mentioned above I'll probably find it in the sevo and then have to order another one of them too!

    Thanks to all for advice.
     
  6. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    5,431
    Likes Received:
    4,449
    Location:
    Thatcham
    You might be right but I would have tried bleeding the system before buying a new master cylinder, they ain't cheap. Don't buy a britpart one.

    Col
     
  7. tottot

    tottot Well-Known Member

    Joined:
    Nov 7, 2010
    Posts:
    4,122
    Likes Received:
    831
    Location:
    west wales coast
    As Col says,bleed the system. Once the fluid level drops below the resevoir air will get into the system. A very slight loss of fluid over some time will be hard to detect,more so with drum brakes. Get the air out and give the brakes some use. It may be fine but keep an eye on the brake units for signs of fluid loss.
     
  8. julianf

    julianf Well-Known Member

    Joined:
    May 29, 2011
    Posts:
    1,688
    Likes Received:
    379
    Location:
    Devon, UK
    If the system had have drained down to the point where there was air below the master, then would it leak back up again, through the master?

    What I mean is, when I pump away to get a firm peddle, and then the pressure comes back up, through the master - I can totally see how, if there is air below, I'm compressing it and that's wanting to push the fluid back up, but should it be able to push around the master seals like that?

    You might be right though. I know that the master won't be sent out until Monday, so I may drop them a line just to hold it until I've had more of a play.
     
  9. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    5,431
    Likes Received:
    4,449
    Location:
    Thatcham
    I have a piaggio scooter. If I leave it unused for a long period the brake levers have no affect, they go back to the handlebars with no pressure. When it first happened, I drained all the fluid out, refilled and bled. Now, I have discovered if I keep pumping the lever and then use a clamp to clamp it to the handlebar the pressure returns after a few hours. This trick also seems to work on my series if I don't use it for a few months, except of course, I use a hammer to wedge the brake peddle down and leave it overnight. Try it, it might work.

    Col
     
    suburban likes this.
  10. suburban

    suburban Well-Known Member

    Joined:
    Nov 1, 2017
    Posts:
    8,256
    Likes Received:
    5,836
    Location:
    w sussex
    heard of similar for a clutch that is difficult to bleed, wedge pedal down overnight.
     
  11. Shippers

    Shippers Well-Known Member

    Joined:
    Mar 7, 2017
    Posts:
    4,131
    Likes Received:
    2,260
    Location:
    Algarve
    That's what I did on my 101 after replacing reservoirs and slave cylinders...
     
    suburban likes this.
< Previous Thread | Next Thread >