Brake bleeder

I use the Mityvac vacuum hand pump and it works very good. I included a
link for the hand pump as well as a canister vac pump.
https://www.amazon.com/Mityvac-MITMV8500-Silverline-Automotive-Vacuum/dp/B0002SQYUA/ref=sr_1_1?s=automotive&ie=UTF8&qid=1524170482&sr=1-1&keywords=mityvac

https://www.amazon.com/Mityvac-MV6835-Vacuum-Brake-Bleeding/dp/B0015POUXM/ref=sr_1_7?s=automotive&ie=UTF8&qid=1524170482&sr=1-7&keywords=mityvac

Ken Shaffer
73 Canyonlands
73 Glacier

> Does anyone know where to buy one of the power bleeders?
> Oliver
> 73 Kinsley
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Oliver,

Yep:

http://www.gmcmotorhomemarketplace.com/jhupy/

BTW this is an old photo; Jim now uses cables instead of chains.

I have used it many times on different coaches and it work better than any other bleeder.

To flush the out old fluid:

1) service the pressure bleeder with three quarts of DOT 4 brake fluid
2) remove the top of the master cylinder
3) use a turkey baster with a short plastic line on the end to suck the old fluid out of the M/C
4) attach the pressure bleeder to the M/C
5) pump up the pressure to 10 psi
6) open the bleeder on the passenger side rear wheel and watch the color of the fluid
7) when the color changes close the bleeder
8) pump the pressure bleeder up to 10 psi
9) open the bleeder on the passenger side middle wheel and watch the color of the fluid
10) repeat step 7)

Repeat steps 5 to 10 on the:

Rear driver side wheel
Middle driver side wheel
Front passenger side wheel
Front driver side wheel

Disconnect the pressure bleeder plate from the M/C
Top up the M/C
Re attach the M/C cover
Empty the fluid in the pressure bleeder back into the can(s) it came in.

I've done this in around 20 minutes.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Oliver Moore
Sent: Thursday, April 19, 2018 3:28 PM
To: gmclist
Subject: [GMCnet] Brake bleeder

Does anyone know where to buy one of the power bleeders?
Oliver
73 Kinsley
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I understand the pressure bleeder is fantastic, but I bought the Harbor Freight pneumatic brake bleeder and have had very good results. Hook it up to your compressor and it sucks the fluid from the brake side.

https://www.harborfreight.com/brake-fluid-bleeder-92924.html

It includes a bottle that you can fill with fluid to keep the master cylinder full, but I've never tried it on the coach.

Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach

>
>
> Does anyone know where to buy one of the power bleeders?
> Oliver
> 73 Kinsley
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Oliver,

However you bleed your brakes - Please.....
Remove each bleed screw and wrap the threaded section with a turn and an half of teflon tape.
Why a turn and an half, because you need the over lap to hold it on and two full turns often makes the screw too tight in the cylinder.
Why Teflon Tape, because no matter how you bleed, fluid that is hydroscopic will get into the threads and induces corrosion so the next time you need
to bleed the brakes you are sure to break a bleed screw.

Do not forget the caps for the bleeders to keep as much water out as you can.

I don't pressure bleed because it is not compatible with most of out vehicles. So I have been vacuum bleeding for decades. I used to have a neat rig
to hang a fluid can so the master cylinder was always at level, but I have to make a new one because some dufus that was working on my car on my lift
left it where a lift arm could come down and crush it. I was really pissed with the guy.
I don't let anybody else work on my car.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
 
https://www.harborfreight.com/brake-bleeder-and-vacuum-pump-kit-63391.html

https://www.harborfreight.com/mityvac-vacuum-pump-39522.html

I use about 10 feet of clear tubing between the and pump / tank and the bleeder valve at the wheels. I temporarily run the tube vertical up the side
of the coach and back down a bit. Now I can see what is coming out of the wheel cylinder / caliper as I pump. I am looking for air and dirty fluid.
When it comes out clean and air free I'm finished.

I also do what Matt suggests and remove, clean, (sometimes with a wire brush or bead blaster) and wrap the bleeder valves with teflon tape before
starting. I have two new / rebuilt calipers that arrived today. I will wrap those bleeder valves prior to installing them.

When the system has been open for caliper, hose, line, or master cylinder work, I like gravity bleeding followed by vacuum bleeding. It is slow but
almost all air is carried to the caliper / wheel cylinder and exhausted and all I have to do is watch and have some coffee. You can also do more than
one wheel at the same time while watching that the master cylinder does not run dry.

There is nothing wrong with pressure bleeding. I have done it that way too.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
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