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Mityvac brake bleeding

Has anyone else ever tried one of these vacuum pumps on the 370?For the life of me i cant get mine to start pulling the brake fluid from the calipers.

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Old 03-10-2019, 04:36 PM   #1 (permalink)
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Default Mityvac brake bleeding

Has anyone else ever tried one of these vacuum pumps on the 370?For the life of me i cant get mine to start pulling the brake fluid from the calipers. I ended up bleeding them by having my GF pump the brakes and then went back to see if the pump would pull fluid and it still didnt. This is after swapping the base brakes to the akebonos. Im wondering if theres a trick or its just junk?
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Old 03-10-2019, 04:41 PM   #2 (permalink)
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I’ve done it multiple times with zero issues, not sure what your issue is.
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Old 03-10-2019, 09:07 PM   #3 (permalink)
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The best way to bleed the brakes is using pressure pumps like motive power bleeder. Doing this as a professional on daily basis, I never been a fan of vacuum brake bleeders.
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Old 03-10-2019, 10:21 PM   #4 (permalink)
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It's pretty junk. The motive bleeder is great. I have both and threw my hand held away after getting motive bleeder.
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Old 03-10-2019, 11:44 PM   #5 (permalink)
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I have a motive bleeder but haven't used it. I heard the hose can burst and some people use it without any brake fluid in case of hose failure.

What is the normal/safe pressure do you recommend?

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Originally Posted by fryzia23 View Post
The best way to bleed the brakes is using pressure pumps like motive power bleeder. Doing this as a professional on daily basis, I never been a fan of vacuum brake bleeders.
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Old 03-11-2019, 09:02 AM   #6 (permalink)
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Originally Posted by nis350 View Post
I have a motive bleeder but haven't used it. I heard the hose can burst and some people use it without any brake fluid in case of hose failure.

What is the normal/safe pressure do you recommend?
Two years of pretty much every day use and no issues with hoses burst or break. Itís itís a solid bleeder and I wouldnít worry about it. I bet those issues people are having are mostly user error more than anything. Keep the pressure at 20psi. Between each caliper bled, give just give few pumps to bring it back again to 20psi as the pressure will bleed off.
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Old 03-11-2019, 09:07 AM   #7 (permalink)
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Don't go above 15 psi with a pressure bleeder. 10-12 psi should be more than plenty. And yes, it is a good idea to always pressurize the bleeder without fluid first so you can inspect the hoses and clamps for any leaks or problems without brake fluid spraying everywhere.

Vacuum pump > pressure bleeder for brakes. I have a much nicer vacuum pump now. My motive power bleeder is far superior to the cheap vacuum pumps (like a cheap Mityvac) but much more of a pain than a good quality vacuum pump.
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