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Johan_B

Member Since: 20 Sep 2024
Location: Gothenburg
Posts: 128

2007 Defender 110 Puma 2.4 CSW Tonga Green

Pictures are from after cleaning up but I admit the thread title is by now a bit misleading. It originates from me crawling under the truck in the dark and finding the left side covered in engine oil, axle oil dripping from the diff and the gearbox being wet, which I assumed was from the AC but I now see is some kind of oil.

Anyway, it leaves marks on the ground as soon as it is parked so will need to be addressed before next MOT, even though it is not urgent at the moment.

I am thinking an external clutch fluid leak has to come from this part. Question is, can it be serviced without taking the transmission out? Also JLR parts diagram doesn't show this part, so not sure if it's only as part of a complete clutch change.

But yes, I can commute to work without getting oil stains on my clothes so not a big drama at this point.

13th Aug 2025 9:05am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

That's the clutch slave cylinder adaptor, and is actually two parts (see picture below). The "T"-shaped part connects to the slave cylinder and also incorporates the bleed valve at the outer end, the smaller part below connects the hydraulic line into the adaptor and is a flow restrictor, the purpose of which is to protect the driveline in the event that your foot slips off the clutch or a hydraulic line fails whilst you have the clutch out.

The adaptor is LR031188, the restrictor is UUG500040, and both are listed in the parts catalogue.

The flow restrictor can be replaced without removing the transmission but the adaptor/bleed valve part cannot since it is retained to the slave cylinder by a spring clip like the one visible in the image below on the adaptor where the restrictor fits (if it wasn't, hydraulic pressure would simply pop it out when you press the pedal).

It is possible that the bleed valve is leaking, it may not be tightened up.

Click image to enlarge

13th Aug 2025 10:33am

Johan_B

Member Since: 20 Sep 2024
Location: Gothenburg
Posts: 128

Thanks! I need to improve my skills searching in the parts catalogue.

I will check the bleed valve as a first step.

13th Aug 2025 1:54pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20939

Just check it’s closed though, the bleed valve, and not tighten it.
As it is a bit fragile, if not careful. ____\We|Will|Win/___
____/🇬🇧🇺🇸\____
_//*⛽️🛢️⚙️🧰*\\_

13th Aug 2025 9:40pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 814

Just having a quick read through this and ill just add this in case it helps or is relevant...
The clutch bleed mechanism on these operates on a 180 degree turn from shut to open.. its a positional thing that takes care of open or closed positions..it cant be tightened down to stop a leak.. if its leaking from the bleed nipple I think it would have to be changed as described above.. a lot of work.😫

14th Aug 2025 6:51am

Johan_B

Member Since: 20 Sep 2024
Location: Gothenburg
Posts: 128

Thanks for the help. I carefully checked that the bleed screw was at its end position. Can’t say that it moved so will see if it helped.

Regarding removing axle breather I’ll add this info here for any other newbie to stumble upon it in the future.

Puma axle breather looks like this:

Click image to enlarge

After cleaning:

Click image to enlarge

Now press the red collar down and pull the breather pipe out. No force required.

Click image to enlarge

17th Aug 2025 7:54am

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