I think the OP bought the little cube shaped thingy. If so there's no mechanism to exert inward pressure on the piston. That's what I have and it does take practice to use successfully.

 

I GUESS I SHOULD NOT DRINK BEER WHILE ANSWERING QUESTIONSON HERE AT NIGHT. THIS IS LIKE DEJA VU, I COULD HAVE SWORN I ANWERED THIS QUESTION SOMEWHERE ELSE ALREADY..........

 

Ah yes, we are indeed talking about different things. I mean the cube.

Now it makes sense what you were saying! I need more coffee.

 

I used a tool like that. The only problem was that the piston had faster thread than the tool and I had to readjust it in the middle to catch the piston again. Which in effect means that it did not apply any pushing force to the piston.

 

That doesn't sound right. The part on the tool that mates with the piston (and pushes it in) is able to rotate independently of the handle you use for applying force and of the piston face. Maybe yours wouldn't rotate - seized or something.

 

I USE THIS KIT FROM MAC TOOLS
MAC TOOLS DISC BRAKE CALIPER SET DBC 2500MA | eBay
THIS IS THE SQUARE(SUCKS, TOTAL PIA IN COMPARISON)
MAC TOOLS DISC BRAKE TOOL - Bing Images

 

Hmm.. it was a while ago, but at the time I was under impression that only the threaded part was turning and thus also pushing the piston. It could be that the "body" part was also slipping and not staying put and I just didn't pay attention.

 

I finished up with the rear brakes on my S-Type today, thanks to a lot of help from the great flks on the Jaguar Forum. Once I found out I needed a special tool I went to AutoZone and rented one. From then on it was straight forward except for the EPB, Electric Parking Brake. I inadvertently activated it twice but no big deal. I recall in reading the posts that the EPB had to be set so I was not surprised when the Jag started beeping as I was about to go for a test drive. Went back into the house and on to Jaguar Forums and came up the procedure for setting the EPB. Followed the directions and went for a ride and everything works fine.
I enjoyed Working on the car and saved man hundreds of dollars.

Also, not to be discounted my wife was impressed and had to eat a little crow. She had not hesitated to say she thought it was too big a job for hubby to tackle. Ahh, sometimes life is sweet.

Well I think I'll reward myself wit a little Remy Cognac.

As an aside I have one of the JTIS CDs. It loads but it does not seem to have all the functionality. There was almost nothing on Brakes except a couple explosions and a very basic procedure. there was nothing on the EPB. Is that just mine copy or are they all kind of useless?

 

Alldata is what I use. I have both JTIS & Alldata and I cannot recall when I had the disk out and used it, in fact it has been in storage for all most a year.

 

Thanks everyone, the brake job is done, calibrated and tested. I have a couple of hundred miles on the car since the job was finished and everything seems fine. This forum is the greatest. The best part of the story is that my wife is having fun bragging to her friends how her husband (me) replaced the brakes on her car. Life is good! Have to run, I was just informed that it is time to take out the trash.
Regards,
PistonSpeed

"The better part of one's life consists of his friendships." and the Jaguar Forum
-Abraham Lincoln (7/13/1849)