I am having brake fluid leaking from the plastic thing that the brake hose attaches to that runs from the reservoir to the master cylinder. Is this something I can buy separately or do I have to buy a whole new master cylinder? If I can buy just the plastic pieces where can I find them?

 

It's very difficult to describe exactly which part is leaking and I can't find a Jaguar exploded parts diagram to help pinpoint you it.

Here's a Brake Master Cylinder Repair Kit for the 1975 XJ12. Does it show the part you need?



Graham

 

I'm attaching a photo of the brake section in the XJ12 parts manual.
Looks like you need RTC1129.
I don't have it, but I searched and Terry's Jaguar does...
Here is the link:
Rtc1129

Hope it helps to fix the problem...

Cheers
David Boger
Everyday XJ

 

This really pushing the boundaries of my memory, so watch out.

Those plastic elbows are a "pop in" affair, and have a very thin section o/ring seal on them.

Any brake parts suppliers should have them, or as Graham suggested, a master cylinder kit will have them, that is those largish looking o/rings in his picture.

The S3 with the container on top of the master cylinder uses the same o/rings, as do many other cars out there, it is NOT a Jaguar specific thing.

Firstly, give the plastic elbow a firm push downward, it just might relocate and seal off, I have been so lucky.

 

Rather than start a new thread I thought I'd continue this one as it's along the same lines (no pun intended).

My S1 XJ6 has been off the road for a year due to engine problems that I am now addressing, however when I got to the car on the ramps and popped the bonnet, I noticed that the Reservoir Hoses (Res to MC) were sodden with brake fluid and the Reservoir was empty!

The paint (unsurprisingly) had been damages in the surrounding area. The area had also began to rust (surface rust) as a result.

I'm cleaning the paint up and treating the surface rust, but obviously want to prevent a repeat of the leak. I cant see any cracks in the reservoir, but to be safe I think I need to replaces the hoses and the plastic fittings they connect to at the MC end.

For the hose, is it just generic remote reservoir hose? ID size?

Advice appreciated,

Woz

 

I've done a bit of reading and, as expected, the hose used to carry brake fluid from the Reservoir to the MC must be compatible with brake fluid. Most rubber hose will begin to 'sweat' after a while, which is what I think may have happen to mine in the first place.

So the materials that seem to fit the bill are:

EPDM (ethylene propylene rubber)
SBR (styrene butadiene rubber)
PTFE (Teflon)
PVC
NYLON

Of the above, EPDM is probably the most flexible and therefore best suited to the job. I'll see what I can find tomorrow.

 

 

Those supply hoses are "Brake Fluid" specific, as mentioned/

Any decent Brake Specialist, ABS, Power Brakes, ATAP, etc down here, will have that hose on the roll.

Memory is 6mm, or 1/4".

Those plastic fittings in the top of the master cylinder really give very little trouble.

 

Thanks Grant.

 

where can I order this kit from