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LR4 brakes soft/hard

Discussion in 'LR4' started by sceh, Apr 28, 2021.

  1. ktm525

    ktm525 Full Access Member

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    OK that should work. Keeping the drain hose submerged in fluid within the bottle. It will take a bit to move air within the drain hose out into the bottle but after that you are golden.
     
  2. sceh

    sceh Well-Known Member

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    Here is another very good video. Why is the two-person method ever used or proposed?

     
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  3. ryanjl

    ryanjl Full Access Member

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    Or just get a power bleeder.
     
  4. ktm525

    ktm525 Full Access Member

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    2 person method is faster and it gives quality marital time.. Power Bleeder is good idea if doing it a lot. Like I said even the mity vac does a good job. You can build a power bleeder for $10.
     
  5. sceh

    sceh Well-Known Member

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    quality marital time..

    Right. When she realises she needs to pump the pedal 28 times (according to LR) for the rear, I think she would have good grounds for divorce!
     
  6. gsxr

    gsxr Full Access Member

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    Fluid spec is "SHELL DONAX YB DOT4 ESL FLUID", which is not standard DOT4. I would not use DOT4, although it may work ok, but that's just me.

    AFAICT that spec is for a low-viscosity DOT4 fluid. What appears to be a reasonable explanation is at this thread.

    "I looked up the specs for this ESL thing. As per Shell, ESL stands for (Extended System Life), but really it is a lower viscosity fluid. Here is Shell’s description of the product :

    A high performance, low viscosity brake and clutch fluid with superior materials compatibility ideal for ABS, electronic stability and traction control systems – suitable for OEM applications.

    In fact, the viscosity is half of the Super Dot 4! Roughly 700 [max 750] vs. 1440 mm2/s [max 1800 mm2/s]. (Kinematic Viscosity at -40C (mm2/s) to be more technical.)"
     
  7. ktm525

    ktm525 Full Access Member

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    Yeah I mentioned that at the start of the thread but I guess I should have highlighted it. I use the Pentosin stuff.
     
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  8. Izzyandsue

    Izzyandsue Full Access Member

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    I did a brake flush with a Motive bleeder, have been using those for over 20 years and as long as the hoses are good, it works great for "one man job". Was having similar issues with hard pedal and flushing it fixed it. Old fluid was reddish brown, new one is apple juice. You only need one liter to do this, using a syringe to remove the fluid from the reservoir, refill it with clean fluid, connect the Motive and pressurize it. Then work from farthest tire to front driver.

    175544747_10223405910354236_3165837603958914895_n.jpg

    Old fluid coloring, rear passenger caliper takes the longest to flush out.
    176337327_10223405911194257_4300207800612687670_n.jpg

    New fluid coming from hose, nice and clear.
    175999347_10223405910554241_7010154938461509499_n.jpg
     
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  9. gsxr

    gsxr Full Access Member

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    Thanks for confirming! I have a similar unit to the Motive and it works great on my other European cars. I've been wondering if any special procedures were needed on the LR4 (some newer vehicles require these), or if it was a simple pressure bleed. Guess I need to buy some of that watery low-viscosity fluid and get cracking on this.

    :2in1:
     
  10. Stuart Barnes

    Stuart Barnes Full Access Member

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    Further to this the v6 manual states

    “If the above fluid is not available, use a low viscosity DOT 4 brake fluid meeting ISO 4925 Class 6 and Land Rover LRES22BF03 requirements”

    A little digging gets me,

    it’s an improved version of the DOT 4. It is glycol, glycol ether and borate esters based. It has a higher boiling point ERBP (min 265) and a higher wet boiling point - fluid wet ERBP (min 175) than DOT 4. It means that far exceeds the standards of DOT4. It offers less response time due to the lower viscosity at -40 (max 700). As a result it enables faster response and optimum performance as brake fluid for brake systems, such as electronic ESP, ABS, TCS, even under the most extreme conditions.

    So leads me to wonder about all the hard brake pedals people have……
     

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