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Harald

Member Since: 30 May 2012
Location: Flanders Fields
Posts: 81

2010 Defender 90 Puma 2.4 Fire LE Vesuvius Orange

Colour of hydraulic clutch fluid

My hydraulic clutch fluid becomes (fast) black after changing the fluid.
Is this normal, of should I be worried?

7th Jul 2019 12:13pm

williamthedog

Member Since: 29 Dec 2012
Location: south wales
Posts: 3441

Its normal. It doesn't take long to change colour as you've already noticed.

7th Jul 2019 12:16pm

Harald

Member Since: 30 May 2012
Location: Flanders Fields
Posts: 81

THNX!!

7th Jul 2019 12:39pm

richcl

Member Since: 25 Mar 2011
Location: tewkesbury
Posts: 25

It maybe a sign that your master cylinder rubbers are degrading / close to failing, as rubber is black.

7th Jul 2019 1:29pm

Harald

Member Since: 30 May 2012
Location: Flanders Fields
Posts: 81

THNX, I thought something like that myself.
But I was not sure if it would be the slave cylinder in the clutch housing, or the master cylinder attached to the clutch pedal.

If I remember correctly the master cylinder is changed a few years ago(by a none OEM one I guess).
Maybe the quality of the rubber cups used in that (non original) cylinder is not as good as the ones in an original LR or OEM cylinder............?

7th Jul 2019 3:31pm

kaney

Member Since: 01 Oct 2018
Location: Bolton
Posts: 232

Just had the Master cylinder replaced as the pedal was soft in the morning but after running the engine for a while firmed up some days it stayed firm for a few days then went soft again (no it did'nt run out of little blue tablets) any way when i looked at the old original one after 176000 miles they took out it was proper black gunk behind the rubber seal and after having it back for a week or so and doing a 100 plus miles its been fine

7th Jul 2019 6:41pm

Harald

Member Since: 30 May 2012
Location: Flanders Fields
Posts: 81

I will have a look at the master cylinder.
The rubber from the cup must be different from the rubber used in the brake master cylinder as the brake fluid keeps his (original) colour.

7th Jul 2019 9:26pm

Pilgrimmick

Member Since: 16 Nov 2015
Location: Highlands
Posts: 581

Not changed mine in ten years and only now going dark. Let’s be honest here it is not worked hard! 80" 1948
Lightweight V8
Bowler Tomcat
130 Station wagon
90 300tdi
(Santana PS10 pick up)
Range Rover L322 (Ful fat)

7th Jul 2019 9:54pm

Timcat

Member Since: 20 Jul 2016
Location: Tanzania at the moment
Posts: 1008

2012 Defender 110 Puma 2.2 SW Indus Silver

Changed the clutch on ours & it wouldn’t bleed 100% plus the fluid was black a day after changing it. New genuine master cylinder & the clutch bled no problem and the fluid is clear..

15th Jul 2019 7:42am

Harald

Member Since: 30 May 2012
Location: Flanders Fields
Posts: 81

Thanks to all who replied.
I ordered a new master cylinder last week.
Hope to get it this week.

15th Jul 2019 9:03am

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