Brake bleeding issue
07-21-2018, 12:41 PM
#1
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Brake bleeding issue
We are having an issue bleeding the right front caliper which we just replaced. All other brakes have been bled but the right front won’t allow any fluid to pass through. The thought is the Bosch ABS pump may be bad. I read elsewhere that using a scan tool it cycles the abs unit to bleed. I read that works on second generation AbS systems. I know that my 1988 is a first generation abs system so not sure if that would apply. Any thoughts as to why fluid will not bleed out?
07-21-2018, 02:04 PM
#2
Burning Brakes
We are having an issue bleeding the right front caliper which we just replaced. All other brakes have been bled but the right front won’t allow any fluid to pass through. The thought is the Bosch ABS pump may be bad. I read elsewhere that using a scan tool it cycles the abs unit to bleed. I read that works on second generation AbS systems. I know that my 1988 is a first generation abs system so not sure if that would apply. Any thoughts as to why fluid will not bleed out?
07-21-2018, 08:38 PM
#4
Burning Brakes
Know what size thread we need?
07-21-2018, 10:29 PM
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The rubber brake line may have internally collapsed. You can disconnect it at the frame rail to confirm this.
07-21-2018, 10:51 PM
#6
Melting Slicks
It's also fairly common for the ABS pump to have a stuck solenoid blocking fluid flow. If it's not the hose and you don't get fluid flow, there's where I would look next.
07-22-2018, 04:25 PM
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I am guessing if it is the pump the only thing I can do is buy a used one at this point correct? They aren’t rebuildable?
07-22-2018, 06:58 PM
#8
Melting Slicks
Are you referring to something like this?:
https://www.amazon.com/Russell-63956...ustomerReviews
Know what size thread we need?
https://www.amazon.com/Russell-63956...ustomerReviews
Know what size thread we need?
07-22-2018, 11:01 PM
#9
Melting Slicks
Yes, finding a good used one or bypassing it are the only reliable options. You can try removing it, using penetrating oil and working the solenoids if you're handy and lucky. They rust-up from years of moisture saturated brake fluid.
