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DoubleRL322



Member Since: 05 Jul 2016
Location: Orlando, FL
Posts: 25

United States 2003 Range Rover HSE 4.4 V8 Zambezi Silver
Brake Bleeding from Empty Master Cylinder

Hi Guys,

I changed front and rear calipers and brake hoses and unfortunately I let the master cylinder get empty.

I have a power bleeder and I understand the normal order is: right rear, left rear, right front, left front. However, before I do that, what other steps do I need to take? Do I need to bleed the master cylinder first? Has anyone had to do this before?

Post #399525 7th Aug 2016 4:01pm
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Andy K



Member Since: 06 Jun 2016
Location: GL
Posts: 48

United Kingdom 2005 Range Rover HSE Supercharged Rimini Red

I think the issue is getting the air out of the ABS unit. And you need a diagnostic tool to do it.

You should have locked the pipes off with a clamp

Post #399559 7th Aug 2016 8:16pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8147

England 2014 Range Rover Autobiography SDV8 Loire Blue

You "can" wreck the master cylinder and the ABS pump with a pressure bleeder, think I'd have a go at filling up the master cylinder and opening the caliper bleed screws and seeing if you could get it through by gravity, worse ways a vacuum pump on each nipple (shut the other three) and very gently pull a vacuum....

Good luck... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
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Post #399578 7th Aug 2016 10:50pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1338

2015 Range Rover Autobiography SDV8 Aruba

As quick as assisted bleeders are, I think you often get too much fluid left in the master tank which you need to take back out. A 2 person job I think is easier, cleaner and just as quick.

As for bleeding the abs, wouldn't be the first time I've ragged it along some gravel and slammed the brakes on to kick in the abs system to flush it through Whistle V8 or else ...

Post #399598 8th Aug 2016 8:58am
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DoubleRL322



Member Since: 05 Jul 2016
Location: Orlando, FL
Posts: 25

United States 2003 Range Rover HSE 4.4 V8 Zambezi Silver

As it turns out, the master cylinder was not completely empty. The following morning I took the cap off and looked directly down and tapped on the master cylinder. I could see the fluid moving back and fourth. It was very low, but definitely not empty. Do you think I am ok? Or is it still bad if it is very low?

Fisha, could the same be achieved by engaging HDC and going down a few levels in a parking garage? I like where your head is at, outside the box Thumbs Up

Post #399617 8th Aug 2016 12:56pm
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nicedayforit



Member Since: 11 Jun 2011
Location: Beside the Solway
Posts: 3969

England 2004 Range Rover Vogue Td6 Giverny Green

If the master cylinder isn't fully empty fill it with new fluid and leave it to stand overnight to let any bubbles to come to the top. I'd then be inclined to take Petes ( Haylands) advice and bleed the new fluid in initially by opening one bleed screw at a time and letting gravity do the work. It doesn't take long for the fluid to come through, changed the fluid on my brakes recently doing this.
See what result you get then possibly finally bleed the brakes the old fashioned way... two people.
With a bit of luck you may not get any air into the abs, if you do take fishas advice...it works. Thumbs Up

Post #399619 8th Aug 2016 1:21pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1338

2015 Range Rover Autobiography SDV8 Aruba

HDC would work as well. I've done that too Smile V8 or else ...

Post #399667 8th Aug 2016 8:48pm
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