the-big-e
Registered User
A customer brought his SC in to replace a leaking ABS pump motor.....
Dave and I started the removal process, pulled the master cylinder out, and replaced the pump motor with one I recently had rebuilt....
We put the SC up on 4 jack stands and started to bleed the brakes when Dave noticed that the new pump motor was leaking brake fluid.....
We looked at each other, rolled our eyes, and had the ABS unit out in record time....
We replaced the pump motor with another rebuilt one and re-installed the unit for the second time....
No leaks.....
Started to bleed the brakes.....
When we got to the front, I noticed that the brake and ABS lights would come on when I applied firm pressure to the brake peddle and the pump motor would run as soon as any pressure was applied to the peddle.....
We couldn't give the customer his car back with the brake and ABS lights on....
Dave pulled the accumulator off the car while I pulled one off a spare ABS unit....
Note: A charged accumulator holds a lot of brake fluid
Installed the spare accumulator and guess what....
Still got the brake and ABS lights.....
I asked Dave if he noticed if the brake and ABS lights were on when he pulled the car in....
He said that the customer drove the car into the garage....
Dave called the customer and confirmed that the lights were coming on while the customer was driving and he was meaning to tell us about it....
Sure would have liked to have known that little bit of info before we started the job....
I've swapped out a bunch of accumulators over the years and the ratio of bad to good is running at about 12:1....
I remember reading about accumulator lifetimes being time sensitive, not mileage sensitive....
These accumulators were OEM and had the hex nut on top.....
I dug through my pile of ABS units and found an after market one....
Installed that one and all lights went out.....
Bled the brakes and all is fine....
Dave and I started the removal process, pulled the master cylinder out, and replaced the pump motor with one I recently had rebuilt....
We put the SC up on 4 jack stands and started to bleed the brakes when Dave noticed that the new pump motor was leaking brake fluid.....
We looked at each other, rolled our eyes, and had the ABS unit out in record time....
We replaced the pump motor with another rebuilt one and re-installed the unit for the second time....
No leaks.....
Started to bleed the brakes.....
When we got to the front, I noticed that the brake and ABS lights would come on when I applied firm pressure to the brake peddle and the pump motor would run as soon as any pressure was applied to the peddle.....
We couldn't give the customer his car back with the brake and ABS lights on....
Dave pulled the accumulator off the car while I pulled one off a spare ABS unit....
Note: A charged accumulator holds a lot of brake fluid
Installed the spare accumulator and guess what....
Still got the brake and ABS lights.....
I asked Dave if he noticed if the brake and ABS lights were on when he pulled the car in....
He said that the customer drove the car into the garage....
Dave called the customer and confirmed that the lights were coming on while the customer was driving and he was meaning to tell us about it....
Sure would have liked to have known that little bit of info before we started the job....
I've swapped out a bunch of accumulators over the years and the ratio of bad to good is running at about 12:1....
I remember reading about accumulator lifetimes being time sensitive, not mileage sensitive....
These accumulators were OEM and had the hex nut on top.....
I dug through my pile of ABS units and found an after market one....
Installed that one and all lights went out.....
Bled the brakes and all is fine....
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