Nicole

Would this system work on the 928? Or maybe I should better ask: Is there any reason why this would not work on a 928?

Power Fluid Extractor
http://www.eeuroparts.com/main/PartDetail.aspx?id=PE

A similar type of bleeding solved the issues I had with my brakes last year, and I'm wondering, if I should keep a such device at hand.

Thoughts?

RKD in OKC

Seems it would work just like the little hand pumps (Mighty Vac) used for a long long time to bleed brakes.

jthwan22

I use one that connect an air hose to pull vacuum. It has very large capacity and no pumping.

Tails

Nicole,
Extractor/evacuator/Mity Vac or pressure bleeders all work on the same principle, differential pressure, so this extractor would work.

Vacuum pumps use atmospheric pressure to force the brake fluid through the lines and out the bleed screws, Pressure pumps use pressure, above atmospheric pressure to force the fluid through the lines and out the bleed screws.

Vacuum pumps exerts less positive pressure on the internal components of the brake system and they can be more easily used by a single person doing the job.

I have a hand brass vacuum pump that thas a graduated clear measuring cylinder in the line between the brake bleed screw and the vacuum pump, so I can view the spent fluid for colour, air bubbles and quantity.

I also made up a hand pressure pump which I have used successfully, however there is always the danger of brake fluid leakage, under pressure, onto the car's paint work.

My recommendation is for the small hand vacuum pump (Mity Vac) and have a small graduated clear cylinder fitted into the suction line as described above. If you go down this route then you will have a dual purpose hand vacuum pump for the HVAC and other vacuum components on you 928.

Tails 1990 928S4 Auto

reedvalve

Nicole-

I have one of these and find it greatly superior to using a Mityvac. You can quickly change/flush brake fluid especially if you alternate between blue & gold ATE.

cheers,
Ethan
87S4

blown 87

I have just about every type of brake bleeding system know to man and 99% of the time we use a pressure bleeder, fast and easy.

On the really hard ones, like some with a concentric slave cylinder we use this one.

http://www.phoenixsystem.com/product...ke_bleeder.htm

Bill Ball

If you are specifically talking about REVERSE bleeding (i.e., fluid - and bubbles - going from the caliper back to the master cylinder reservoir) then this would not work. You would use a positive pressure injector at the bleeder end, like the Phoenix tool I have and Greg mentioned. If you just mean sucking at the bleeder, then this suction tool or a Mitivac would work.

reedvalve

my mistake, I was referring to this unit by the same company, which works by pressurizing the master cylinder resevoir:

http://store.motiveproducts.com/shar...unt2=273200631

It makes bleeding very easy

regards

Bill Ball

Ah, well I used there reverse bleeding injector systems when I installed a couple of 928 clutch slaves recently and it made slave bleeding very easy. Same for a clutch master.

http://www.brakebleeder.com/index.ph...products_id=14

Nicole

Aww I'm getting old! I meant vacuum bleeding, where the brake fluid is sucked out through the bleeder nipples at the calipers.

I corrected the subject line.

Will have to do the Saab brakes soon, and wanted to make sure that if I buy a device, it's 928 compatible.

blown 87

I have done hundreds, if not thousands of brake jobs on SAAB's and never used anything but a pressure bleeder.
I have had the expensive bladder types and I honestly prefer the non bladder types, they are cheap and easy to use.

dr bob

Greg, It's been a [l-o-n-g] while since I handled the tools to pay bills, but I remember having to buy a bladder-type bleeder to use on customer cars. The non-bladder type were outlawed. This would be early- to mid-1970's time period. Claimed reasoning was that moisture in the air supply would contaminate the new fluid in the bleeder. What's the current industry thinking? Maybe the hand-pumped units like the Motive are OK, since you don't push shop air through them?

I'be been considering adding a couple dessicant drier columns to my home garage air system. Need to get the purge valving worked out. The columns are cheap; I'll probably spend more on the valves.

blown 87

The kind I am talking about is like a garden sprayer, it is not hooked up to shop air.
I use a Blue-Point.

dr bob

I'm thinking that you either A) Own a pile of Snap-On stock, or B) Your name shows up high on Snap-On's P&L and 10Q filings.

I love the tools, they work great and just fit my hands perfectly. I just can't seem to make my empty wallet into a suitable tool holster and belt for them. Of course there's always the friendly salesman's Lay-Awake Plan... The no-interest just-until-you're-an-addict plan from the white-and-red tool-pusher's truck. Of course, you can quit anytime you want, but when that truck shows up, we are like moths to the flame again.

blown 87

Sounds like you have been there Dr Bob.

It is a never ending cycle, you have to have the tools to work on the cars.