WHMac59
New Member
Not sure this is the right thread to be under, however, I have to start somewhere. LOL!
Had to replace the rear wheel cylinders on my '95 GMC Suburban. Son had been driving when he said the ABS and Brake-light came on. I knew one wheel cylinder was leaking, but added fluid as needed. I suspect son did not check fluid level the days he was driving it and the fluid was too low.
Anyway, I replaced both wheel cylinders, brake shoes and pads, and because I saw what may be a leak from the master cylinder (MC) replaced it. I replaced the wheel cylinders around 10 years or so ago and the MC. Brakes bleed out just fine, then.
Now, however I have yet to get a steady stream of fluid from either rear wheel cylinder.
I get air out on the first pull, a stream on the second pull and then barely a dribble on the third and subsequent pulls. (Have used 2.5 quarts of fluid thus far).
While the motor is off pedal is about where it should be, until I crank it, then the brake pedal goes almost to the firewall.
I do not have access to an analyzer or scan tool for an OBD1 system to active the ABS to pump air out of it. At least I suspect it is air in the ABS, but have no sure way of knowing for sure.
Can anyone give me guidance or advice on how to bleed/burp the ABS manually? I checked with local shop in my small town and his old analyzer does not have the ability to active the ABS.
I saw a video where there is a plunger on the top of the ABS you can mash after someone holds the brake down to bleed air. Did this, but never did get brake fluid out of it as the man on the video showed. I didn't know until later there was a second valve on the bottom of the K-H ABS box. I am going to try that but am not holding my breath.
This truck is a daily driver and has put a crimp in me getting to work while waiting on the wife's vehicle to become available.
I have done many, many brake jobs in my life while putting myself through college and graduate school, (graduated in 1984). I have never had one I could not get a steady stream of brake fluid. Nor have I dealt with ABS systems or had to. However, the day of reckoning has came upon me and I am pulling my hair out for not having bought a "gizmo" scanner for this truck in 1999 when I bought it.
I have no pedal, that is, no brakes to even leave my yard to try and get the truck on the road to see if stabbing the pedal hard will activate the ABS. I have read this works at time, and the mechanic friend I talked to said that has worked for him and he could bleed the brakes after that and get all the air off. He did say, he could at least stop the vehicle, do not get no the road if I have no stopping function at all, which I do not.
Any thoughts and ideas on how to alleviate this situation, would be most appreciated.
I go by WHMac and my direct email address is: [email protected].
Thank everyone in advance that shares,
WHM
Had to replace the rear wheel cylinders on my '95 GMC Suburban. Son had been driving when he said the ABS and Brake-light came on. I knew one wheel cylinder was leaking, but added fluid as needed. I suspect son did not check fluid level the days he was driving it and the fluid was too low.
Anyway, I replaced both wheel cylinders, brake shoes and pads, and because I saw what may be a leak from the master cylinder (MC) replaced it. I replaced the wheel cylinders around 10 years or so ago and the MC. Brakes bleed out just fine, then.
Now, however I have yet to get a steady stream of fluid from either rear wheel cylinder.
I get air out on the first pull, a stream on the second pull and then barely a dribble on the third and subsequent pulls. (Have used 2.5 quarts of fluid thus far).
While the motor is off pedal is about where it should be, until I crank it, then the brake pedal goes almost to the firewall.
I do not have access to an analyzer or scan tool for an OBD1 system to active the ABS to pump air out of it. At least I suspect it is air in the ABS, but have no sure way of knowing for sure.
Can anyone give me guidance or advice on how to bleed/burp the ABS manually? I checked with local shop in my small town and his old analyzer does not have the ability to active the ABS.
I saw a video where there is a plunger on the top of the ABS you can mash after someone holds the brake down to bleed air. Did this, but never did get brake fluid out of it as the man on the video showed. I didn't know until later there was a second valve on the bottom of the K-H ABS box. I am going to try that but am not holding my breath.
This truck is a daily driver and has put a crimp in me getting to work while waiting on the wife's vehicle to become available.
I have done many, many brake jobs in my life while putting myself through college and graduate school, (graduated in 1984). I have never had one I could not get a steady stream of brake fluid. Nor have I dealt with ABS systems or had to. However, the day of reckoning has came upon me and I am pulling my hair out for not having bought a "gizmo" scanner for this truck in 1999 when I bought it.
I have no pedal, that is, no brakes to even leave my yard to try and get the truck on the road to see if stabbing the pedal hard will activate the ABS. I have read this works at time, and the mechanic friend I talked to said that has worked for him and he could bleed the brakes after that and get all the air off. He did say, he could at least stop the vehicle, do not get no the road if I have no stopping function at all, which I do not.
Any thoughts and ideas on how to alleviate this situation, would be most appreciated.
I go by WHMac and my direct email address is: [email protected].
Thank everyone in advance that shares,
WHM
