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
