I have the ABS Brakes 1989 XJS V12 TEVES system.
I had no issues when bleeding the front calipers, but whatever I try the rear bleed niples are totally dry and I cannot get any fluid coming out at both sides.
Sequence: 2 persons method - ignition on. wait until pumps is off, pushing brake pedal and keep it pushed, open bleednipple - result: nothing coming out regardless how often I try. completely dry.
I then just losened the green hose screw nut at the caliper just a bit to see if there is any brake fluid getting into the caliper. Yes. there is.
Also the rear brakes are operating bcs I can see the brake pads moving. However, the pedal is still spongy. There is definitely air in the calipers as I had the IRS out for several weeks (diff overhaul).
The Teves pump shuts down in less that 15 seconds always, however goes ON 1-2 for a few seconds while the pedal is pushed down.

I am getting to the point that I have no my ideas about what I can try next? I do not think both calipers in rear are clogged at the same time.
Any ideas?

 

You have fluid at the line in, so I suggest that your bleed screw is plugged. Try taking it out and see what you get then. You're already bleeding them so it won't be like you're making more work. At worst I think you'll need new bleed screws

 

Hi hghan

If the Brake Reservoir ever ran dry then you do need to Bleed the Low Pressure Side of the System, or else you'll be wasting your time

Just be very Careful not to Spill any Brake Fluid on the Paintwork and do not let the Reservoir run dry, or else you will have to Start all over again

This is how you do it on Page 19 of my 'Cherry Blossom' Restoration Thread about half way down the page but also be Very Careful not to break the Plastic Elbow that goes into the Brake Pump, which is held in place by a Spring Pin and 'O' Ring

If you don't think you are able to get that Plastic Elbow out, as it could be in tight, then you could always try Pressure Bleeding, which is not my favourite method as if the Pressure Bleed Cap flies off, as it once did for me then you could end up Splashing Brake Fluid all over the Car, so do keep a Bucket of Soapy Water handy!

And use the lowest possible pressure if trying to do it that way, although taking the Plastic Elbow out of the Brake Pump is the method I prefer that always works for me

Good luck be Careful and you should be ok

How to Bleed the Low Pressure Side of the Teves System including lots of Photos that Show you what to do

 

hghahn,

I'd suggest you retry bleeding the rear calipers correctly, not the way you've been doing it. You must do the rear brakes the correct way. You don't use any pedal pressure at all.

The correct procedure for the rear brakes is to turn on the ignition, loosen the bleed nipple, then let the pump kick in as it senses that it needs to pressurise the rear open circuit. Don't let it run for more than 15 seconds. If you haven't expelled all air after 15 seconds, tighten up the nipple, turn off, wait one minute, then start again. Do the other side the same way.

Good luck

Paul

 

Good to know!

 

some of the guys who have the abs systems are converting back to the Vacuum booster systems!
problem wise and money wise?

 

I had similar issue to you so I made a pressure bleeding system from a cheap weed sprayer and a rubber plug. Worked a treat use it every couple of years when I renew the fluid.

Jaguar XJS Restoration : How to bleed Jaguar XJS teves ABS

 

The photos don't show in that, any chance of seeing them somehow? Different photo hosting service? Or post here?

 

You helped me a lot. And it is solved! At first I thought your suggestion to clean the bleed nipple is useless (i checked before posting). Indeed I could completely take the bleed nipples out and it was still dry. When I spent second thoughts on this, I tried to unscrew a bit the bypass hose screw (that connects both parts of the caliper) at the end where the bleed nipple is. I found that brake fluid spills out easily there. Means line-in was ok. Then I took a pop rivet at right diameter and tried to stick it into the hole where usually the bleed nipple sits (Lying under the car and cannot really see the top of the caliper is not really helpfull). And .. yes you were right! Its was completely plugged on both calipers. After some minutes of drilling the pop rivet I managed to clean it and then I could bleed both calipers the normal way. I took a poprivet because it cannot fall inside and is pretty stiff. What a relief! And there came lots of dirty stuff out. Now, my brake pedal is firm and I am happy. Again many thanks for your help.
PS I am not English native speaker .... pls forgive the many mistakes in the above.

 

We appreciate that you take the time to let us know how it came out. Great for future reference.

 

Sorry guys been AWOL.

Photobucket is the issue with the BLOG and I can't find the original photos. Here is the new one I made, the cap is an old foot of a lounge but you could use an old brake cap or as I did in my original bleeder a 1" rubber plug. The pump is a cheap garden sprayer.