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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!att-out!cbnewsh!fwk
- From: fwk@cbnewsh.cb.att.com (f.w.kerfoot..iii)
- Subject: Re: Recommendations for one-man brake bleeding tools?
- Organization: AT&T
- Date: Wed, 11 Nov 1992 19:57:55 GMT
- Message-ID: <1992Nov11.195755.12301@cbnewsh.cb.att.com>
- References: <1992Nov11.163853.10343@infonode.ingr.com>
- Lines: 38
-
- From article <1992Nov11.163853.10343@infonode.ingr.com>, by lester@naomi.b23b.ingr.com (Les Bartel):
- > In article <5889@airs.com>, andrew@airs.com (Andrew Evans) writes:
- > |> I need a tool that will allow me to bleed my brakes without an
- > |> assistant to pump the brake pedal. In my car's Haynes manual they
- >
- > I've had good luck using plain ole gravity. Remove the filler cap, and
- > open the nipples. I do one at a time. This can take a while. If you
- > have the brakes apart, squeeze the calipers/pistons all the way in to
- > force most of the fluid out of the cylinder. Make sure that the resevoir
- > is never allowed to empty. After all the brakes are bled, pump the
- > brake pedal to refill the cylinders after installing the pads/shoes and
- > drums/rotors (again make sure that the resevoir doesn't empty).
-
- A variation on this that works faster and in some cases makes the
- difference between working and not working is to apply some additional
- air pressure to the top of the reservoir. In my case I obtained an
- extra cap for the brake reservoir, and installed a tire valve in it
- (I used the "mag wheel" type, to make installation easy). I then
- bought a "clamp on" type air chuck which holds itself to the tire
- valve. I apply about 20 PSI (using my shop air compressor)
- to the top of the reservoir. Then just go to each valve and open it,
- one at a time. The only danger, as Les mentions, is draining the
- reservoir of fluid, which can happen relatively quickly.
-
- Many variations are possible. If you can't get a spare reservoir cap,
- you could fabricate a sheet metal plate and a rubber gasket (old
- inner tube) with a tire valve in it, and clamp it to the top of the
- reservoir. If you don't have an air compressor, some people have
- used the spare tire as an air supply (there is no air flow other
- than leakage). Refill the spare at the gas station after you are
- done. You could use other ways to hook your air supply up to the
- reservoir cap other than a tire valve. DON'T use more than 20-30 psi
- or you will make a big mess.
-
- Have fun-
-
- Frank Kerfoot
- fwk@hogpa.att.com
-