Remember that the MC has two sections (front and back brakes). Sounds like one of them isn't working.
> -----Original Message----- > From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of > Kaleb Striplin via Mercedes > Sent: Friday, May 24, 2019 4:42 PM > To: Mercedes Discussion List <mercedes@okiebenz.com> > Cc: Kaleb Striplin <ka...@striplin.net> > Subject: Re: [MBZ] Chebby brakes > > The braking effort seems fine. This has the hydro boost brakes rather than the > vacuum booster. I’m still suspecting the MC is weak. It’s not expensive or > hard > to replace so I will probably replace it. > > Sent from my iPhone > > > On May 24, 2019, at 3:06 PM, G Mann via Mercedes > <mercedes@okiebenz.com> wrote: > > > > I'm glad you mentioned that leading wheel cylinder issue. > > Which leads me to this: > > If the brake fluid is rank, which it was, and the wheel cylinder is > > leaking, it's likely the master cylinder rubber cups are also leaking, > > just a bit. When master cylinder leaks on Chebbys with brake vacuum > > booster behind it, the brake fluid eats the diaphragm in the vac brake > > booster, which means, you do not get "full brake assist" from the brake > booster. > > Eventually, the leak will get so bad you can hear vacuum leak sucking > > when you press the brakes, which are not doing their job. > > > > Could you have a failed or failing vac brake booster? If you do, > > ALWAYS replace booster and master cylinder as a pair. > > It's a Chebby falt point. might just be why brakes have been crap and > > still are. > > > > On Fri, May 24, 2019 at 12:55 PM Kaleb Striplin via Mercedes < > > mercedes@okiebenz.com> wrote: > > > >> The rear wheel cylinders were leaking and contaminated the shoes so > >> that is why o replaced all that. I’m going to adjust the shoes either > >> today or tomorrow then see what happens. It’s either that or I > >> somehow still have air on the lines, which I can’t see how. Or air on > >> master cylinder or it’s bad, it if it was bad I would think it would start > sinking to the floor. > >> > >> > >> > >> Sent from my iPhone > >> > >>> On May 24, 2019, at 2:41 PM, G Mann via Mercedes > >>> <mercedes@okiebenz.com> > >> wrote: > >>> > >>> In the interest of time and effort, try adjusting them, wheels on. > >>> If > >> they > >>> don't adjust out enough to lock up the wheel, then it's time to pull > >>> the drums and take them to FLAPS to be measured for ID. Could be why > >>> you > >> never > >>> had good brakes to start with, some dip wit did a brake job and took > >>> the drums beyond limit, so even though they "look fresh" they > >>> should, since > >> the > >>> shoes weren't rubbing on them, ha. > >>> > >>> That truck should be able to lock up the wheels when you stomp the > >>> brake, so something is not where it should be. > >>> > >>> On Fri, May 24, 2019 at 12:26 PM Kaleb Striplin via Mercedes < > >>> mercedes@okiebenz.com> wrote: > >>> > >>>> I will probably pull the wheels back off and adjust the shoes, or I > >> guess > >>>> I could do it with the wheels on. I did not measure the drums, they > >> still > >>>> looked good with very little wear, at least they did not have a > >>>> ridge at the edge. I hate drum brakes. > >>>> > >>>> Sent from my iPhone > >>>> > >>>>> On May 24, 2019, at 2:19 PM, G Mann via Mercedes < > >> mercedes@okiebenz.com> > >>>> wrote: > >>>>> > >>>>> If you want bad brakes, rely on the automatic adjusters. > >>>>> If you want good full pedal, adjust the shoes till they lock up > >>>>> the > >>>> wheel, > >>>>> then back the adjuster off until you just can feel a very light drag. > >>>> First > >>>>> couple of hard stops will "wear in" the shoes and you will turn > >>>>> free > >> with > >>>>> no drag. > >>>>> OR, > >>>>> Find a clear area and back up, hit the brakes while backing up, > >> multiple > >>>>> times ie pump, pump, pump.. pull forward and do it again and again. > >>>>> The only time automatic adjusters engage is when you are backing > >>>>> up, [clever huh?] My personal preference is to manually adjust > >>>>> them so I can actually > >> feel > >>>>> that I have full contact, then back the adj off a touch. > >>>>> > >>>>> You will much improve pedal travel and brake contact. > >>>>> > >>>>> Question: Did you measure the rear drums when you had them off? > >>>>> It's possible they were turned to the limit at last brake job and > >>>>> are now > >> out > >>>> of > >>>>> limit large, so even new shoes won't fill the space? > >>>>> > >>>>> On Fri, May 24, 2019 at 11:53 AM Kaleb C. Striplin via Mercedes < > >>>>> mercedes@okiebenz.com> wrote: > >>>>> > >>>>>> If the master cylinder has air in it, will bleeding at the wheels > >> remove > >>>>>> that air, or does it need to be bled in a separate procedure? > >>>>>> > >>>>>>> On 5/24/2019 1:21 PM, Kaleb C. Striplin via Mercedes wrote: > >>>>>>> Yea I guess I could try that. I had planned on just letting > >>>>>>> them adjust out on their own. > >>>>>>> > >>>>>>>> On 5/24/2019 1:18 PM, Meade Dillon via Mercedes wrote: > >>>>>>>> So have you adjusted out the rear brake drums? If not, that > >>>>>>>> would > >> be > >>>> my > >>>>>>>> next move. > >>>>>>>> ------------- > >>>>>>>> Max > >>>>>>>> Charleston SC > >>>>>>>> > >>>>>>>> > >>>>>>>> On Fri, May 24, 2019 at 2:15 PM Kaleb C. Striplin via Mercedes > >>>>>>>> < mercedes@okiebenz.com> wrote: > >>>>>>>> > >>>>>>>>> Ok, I a bled the crap out of it. I did the bleeder at the abs > >> unit, > >>>>>>>>> then did all the wheels again started and RR, the LR, RF, LF. > >>>>>>>>> I ran about 3qts of fluid thru it. At all wheels I have clean > >>>>>>>>> fluid and > >> no > >>>>>>>>> bubbles coming out. Took it out and it still has very little > >>>> braking. > >>>>>>>>> Pedal goes probably 3/4 of the way to the floor till any sort > >>>>>>>>> of braking action happens. It will stop, but not very fast > >>>>>>>>> and would not stop pulling a trailer. Even if the back brakes > >>>>>>>>> were not fully adjusted > >>>> out > >>>>>>>>> yet it would be better than this. When I pump the pedal it > >>>>>>>>> does > >>>> return > >>>>>>>>> but its not an instant return as soon as you left off the pedal. > >>>> Also, > >>>>>>>>> when just holding steady pressure at about the half pedal > >>>>>>>>> travel or oven > >>>>>>>>> 3/4 travel pedal does not sink it seems to stay steady. Also, > >>>>>>>>> the > >>>> red > >>>>>>>>> brake lite is on that would come on if the parking brake is > >>>>>>>>> on, the manual says this indicates a brake problem. No joke. > >>>>>>>>> I really do > >>>> not > >>>>>>>>> see how I could still have air in the lines. Brakes are worse > >>>>>>>>> than they were before I replaced the rear wheel cylinders but > >>>>>>>>> they were never very good in the first place. The front > >>>>>>>>> calipers and hoses are fairly new also. > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >>>>>>>> _______________________________________ > >>>>>>>> http://www.okiebenz.com > >>>>>>>> > >>>>>>>> To search list archives http://www.okiebenz.com/archive/ > >>>>>>>> > >>>>>>>> To Unsubscribe or change delivery options go to: > >>>>>>>> > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>>>>>>> > >>>>>>> > >>>>>>> --- > >>>>>>> This email has been checked for viruses by AVG. > >>>>>>> https://www.avg.com > >>>>>>> > >>>>>>> > >>>>>>> _______________________________________ > >>>>>>> http://www.okiebenz.com > >>>>>>> > >>>>>>> To search list archives http://www.okiebenz.com/archive/ > >>>>>>> > >>>>>>> To Unsubscribe or change delivery options go to: > >>>>>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>>>>>> > >>>>>> > >>>>>> _______________________________________ > >>>>>> http://www.okiebenz.com > >>>>>> > >>>>>> To search list archives http://www.okiebenz.com/archive/ > >>>>>> > >>>>>> To Unsubscribe or change delivery options go to: > >>>>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>>>>> > >>>>>> > >>>>> _______________________________________ > >>>>> http://www.okiebenz.com > >>>>> > >>>>> To search list archives http://www.okiebenz.com/archive/ > >>>>> > >>>>> To Unsubscribe or change delivery options go to: > >>>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>>>> > >>>> > >>>> > >>>> _______________________________________ > >>>> http://www.okiebenz.com > >>>> > >>>> To search list archives http://www.okiebenz.com/archive/ > >>>> > >>>> To Unsubscribe or change delivery options go to: > >>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>>> > >>>> > >>> _______________________________________ > >>> http://www.okiebenz.com > >>> > >>> To search list archives http://www.okiebenz.com/archive/ > >>> > >>> To Unsubscribe or change delivery options go to: > >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>> > >> > >> > >> _______________________________________ > >> http://www.okiebenz.com > >> > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >> > >> > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
