Do I need to bench bleed a handbrake cylinder?

Hey Guys! I just had a quick question! do I need to bench bleed a hydro handbrake cylinder? And if I'm filling all empty lines should I just fill the reservoir with all the bleed screws undone then once fluids coming out of all of them, go through the bleeding process? Or do I just bleed/pump right from the get-go?

I'll hopefully be rallycrossing on Ghost lake come sunday!! just need to get some final things sorted out.... I'll be sure to take video and post it

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You're going to have air in front of the hand brake? If so filling it ahead of time is a waste. I'd not open more than one or two bleeders at a time and let gravity do its job. Too easy to run the MC dry accidentally. Then you start over again.

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heymagic
You're going to have air in front of the hand brake? If so filling it ahead of time is a waste. I'd not open more than one or two bleeders at a time and let gravity do its job. Too easy to run the MC dry accidentally. Then you start over again.

Yes, Air in front of it. Thanks for the tip! I'll do that, I appreciate the quick response.

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I'm always posting on Instagram...follow me! PeteNaz Instagram

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Bench bleed the HB master, then let the input line gravity bleed, once the fluid gets there quickly plug it into the HB master. This way there's a lot less air to deal with and the pumping action wont cause cavitation anymore.

Ah, conflicting methods. Use Paul as the best reference on this. I've only done it the other way and that certainly doesn't mean it is the best way..

There's many ways to skin a cat and its not wrong to do it the other way at all. But doing like I said, is just quicker at getting rid of the bubbles that can get tracked. And its how you do "on the fly" master changes in cars like on this Blancpain BMW Z4 GT3. No need to bleed after a master change.

Best way to bench bleed? It doesn't have its own res. so I have been thinking I can use my clutch res. which has a feed hose (empty right now as well) connect to a hose barb in the inlet of the HBMC and have at? or do you have other ways Paul?

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PeteNaz
Best way to bench bleed? It doesn't have its own res. so I have been thinking I can use my clutch res. which has a feed hose (empty right now as well) connect to a hose barb in the inlet of the HBMC and have at? or do you have other ways Paul?

It's in the rear circuit, the rear circuit has a res, and for a bench you could use the mount welded into the floor!

Creative thinkin'

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John Vanlandingham
Sleezattle, WA, USA

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john vanlandingham
It's in the rear circuit, the rear circuit has a res, and for a bench you could use the mount welded into the floor!

Creative thinkin'

Ok hahahaha just trying to dissect you sarcasm I'm assuming you mean the res is just the system in front of it, but you've get me stumped on the "mount welded to floor" haha I feel like a doof for not getting it.... you know I cant weld anything to concrete.... I kidddddd lol (about my interpretation not the fact you cant weld to concrete)

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I'm always posting on Instagram...follow me! PeteNaz Instagram

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Just drop some fluid in the in port, use a small hose or something. You're going to get your hands wet anyways. Just put the fluid through the in port until it comes out the out port, no need to pump it, just tilt it a bit to make sure the outport is at the highest point.

This all deal just helps with bleeding the rear calipers afterwards. Bitch bitch bitch work to get trapped bubbles out from behind piston seals. I have a video of a bleed job on a prototype acrylic caliper where we could see the bubbles behind the seals and not moving out for nothing including using all black art methods. So the less air (under pressure) you send back there the better. Hence why I recommend gravity bleeding vs pumping the pedal.