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The clear vinyl line between the Motive brake fluid reservoir and the master cylinder reservoir screw on cap burst on me at 15-20 PSI.

I'd used the thing maybe a dozen times in 14 or so years.

Need to flush again, so going to find a replqacement line section.

The hose clamps Motive uses are sort of terrible, at least on mine. Hopes Motive uses better hose clamps.

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Beh.

Hi Kitty!

Why so much pressure Dude? 15 to 20 psi is more than twice what I put in my lawnmower tractor tires.
8 psi is recommended for it and most overweight passengers! (:-)

I’m surprised that the reservoir, on the master cylinder itself, didn’t blow up and out of its rubber seals! Luckily the surface area is small in there!
I put a twist wire around the unit or I guess you could use a bungee cord wrap? Anything quick, on and off for safety because you don’t want

I made a right angle 1/8 pipe fitting screw into a spare reservoir cap I found at the junkyard.
i add a short hose with a standard disconnect air fitting for flexibility up to the reservoir.
I then hook all that up my long regulated shop air line and just dial the regulator up.
The most I ever use is 10psi.
The long hose creates some loss to the car and my calipers bleed out just fine.

I watch the reservoir to add fluid. It never gets overfilled as I bleed it out right down to the max line.
No extra fluid left in that bigger bottle to get air and moisture exposure.
What comes out of the original bottle goes directly into the system.
I suppose an in-line desiccant package or my refrigerated air dryer in between the two would be a good idea but the volume doesn’t warrant it or the power to cool the unit down.
Again, just not that much moisture involved in the short air space in the master cylinder reservoir.

The motive bottle is huge but then it’s made to be used in a “brake shop” on a continuous basis.
My cap setup can store in a drawer!
Only trouble is I keep forgetting, which one where? (:-(
I bet the bottle is not so hard to misplace, isn’t it?

14 years is not so long of a time to keep useful tools, as long as you remember what it’s for!
I have made some, I’ll get around buying “thats” and it takes a moment to do, just that!
(:-)
I’m getting better at labeling lately!
It’s the “silent shame” of getting older!

Phil

15-20 psi is a ball park figure.

The Motive Power Bleeder instructions suggest to use 15 psi or the pressure recommended in the vehicle's service manual.

Myself, I have a Gunson Eezi Bleed which is pressurized by the spare wheel. The print on the bottle says pressure should be "no more than 1.4 bar" (20.3 psi).

Hiya Grey245 and Phil Machine Man,

Yeah, that's what it says in the documents I read to set and allow the pressure to around 15-20 PSI.

The Motive power pressure bleeder I have is 15 year old? Maybe more?

I rinse the thing out with 90% isoprppyl alcohol as the Motive instructions say. No turbobricks mods on my part here to the power bleeder.

I'll get a replacement clear vinyl hose section. Hopefully clear vinyl hose that has a high pressure rating or wall thickness?

Wish me luck. Thank you!

Where's Uncle Old Duke?

Buttermilk MacDuffy's Tavern

--
Beh.

when I bleed I use the same motive pump BUT I still use fluid in a bottle,,air always seems to get in there

Yeah, that's one possible sequence, and one that's conventionally adhered to.
The exact sequence isn't actually that important, however.

The eagle eyed will have noticed that the official Volvo procedure is to start on the "left front wheel". You can see it right there at step #3.

This has been noticed on this forum before, BTW.

The terminology "left front" also implies it doesn't matter if you have a LHD or RHD vehicle, despite the brake master cylinder being in a different position.