Atmospheric pressure on an average day is about 14.2 psi. So, if someone is concerned about the 10 psi working pressure of the Motive Power bleeder forcing air into the brake line, they logically should be more concerned with atmospheric pressure forcing air into the fluid through the reservoir cap on any given day.

just my $.02

Make one yourself. The tire valve is for preasure check.

Robert

940T '92 207000km

I have used the MPB on our 95 960 and our 98 S90, both have ABS and the MBP worked great! Fast, efficient, one man operation. The only way to go.

DEWFPO
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1998 S90 071,245 and 1995 964 154,100

I love my motive bleeder, It'get's alot of use, and it's worth it's weight in gold
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-------Robert, '93 940t, '90 240 wagon, '84 240 diesel (she's sick) , '80 245 diesel, '86 740 GLE turbo diesel, '82 Mercedes 300SD for sale

I used the bleeder and it works fine as a one-person operation; Used it on a '97 960 with abs and I don’t think you need to worry about forcing air into the fluid; you just don’t create enough pressure to cause that to happen; Couple of hints:
Use a turkey basted and suck out as much of the old fluid as you can--there will be a separate reservoir that you can’t reach; however, as you add new fluid, it will cause a spill-over that will diluted the old stuff; take your time and don’t forget to keep the reservoir topped off as you remove the old fluid. I always start at the closest wheel to the abs braking system. Oh yes, I always justify my purchases of new tools by telling my wife “what it would have cost to have the dealer do it.” Works every time

Over 30 years I've found brake bleeding inextricably entwined with potential threats to marital bliss. For many of those years asking for help with the pedal was the worst of it.

Then, I thought I had a better mousetrap by connecting clear tubing and a hand vacuum pump through a mayonnaise jar fluid receptacle, however I pumped more air from around the bleeder screw threads than fluid into the jar.

When I "borrowed" the garden sprayer to apply pressure, I caused more damage to the bliss factor, and finally last year, nary an eyebrow was raised at spending $40 for that nice, compact, dedicated pressure bleeder Motive puts together.

If it wasn't for the useful coolant cap adapter on the garden sprayer, I could consider returning it now...
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Art Benstein near Baltimore

Or you could make one:

http://www.bmw-m.net/TechProc/bleeder.htm
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Carter

kkoch,
I have used mine a couple of times and it is a great tool. I just wish I had known about it when I had my Saab 9000 and had to power bleed the clutch slave cylinder using a spare tire and jury-rigged valve on the brake fluid resevior. On the other hand, without that frustration I may have never found the lovely Volvo world. Buy one, you will not be disappointed.
Palmer
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1994 944na, 1980 265 V8, 1989 244, 1987 745ti

Great product that solves a lot of brake rebuilding and bleeding problems. If you have more than one car to maintain, go for it.

I have used a Motive Power bleeder on a number of Volvos (and other cars using the adapter kit) and have had no issues whatsoever. It makes brake bleeding easy enough that my 13 year old son has used it on what will someday become "his" 240. Definitely worth the money, and maybe the best $40 or so you'll ever spend on a tool.
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Mike W., six Volvos (four that run), Largo, FL

I got mine this winter and have done two cars (240s, both non-ABS). It made bleeding brakes very, very easy. I found that 10 psi was more than adequate pressure, but because I'm a pessimist I secured the fluid reservoir with zip-ties anyway.

I recently read this, though. Don't know what it is worth, but I intend to keep using mine regardless. Could 10 psi cause this problem??

"Like the professional units, these imitations contain a pressure vessel into which new brake fluid is poured. However, in order to pressurize the fluid, an integral pump handle is cycled to build the pressure inside the vessel without any measures taken to separate the pressurized air from the fluid. For those of you who have ever bought a $19.95 do-it-yourself potted plant and bug sprayer from Home Depot you get the idea.
Of course, having pressurized air in contact with the brake fluid will certainly force the fluid through the system just as effectively as the high-zoot professional unit, but as an added bonus we are stuffing air into the brake fluid at the same time. Talk about an unwanted surprise!"

Source: http://www.stoptech.com/whitepapers/brakefluid1a.htm

Erling.
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My 240 Page