Has your hydraulic control unit (HCU) been bled?

[Swttrk302]

Thanks for your input, but it is of no use here.

You are posting in the 2nd generation sub forum. Your truck is a 4th generation explorer. You should be in the 4th gen sub forum.

 

[Swttrk302]

My apologies.

 

[Danny c CARLILE]

I have a 1989 Ford ranger, I have replaced the power booster, master cylider, hydraulic module, ab S speed sensor, and have bled the lines 4-5 times. I bought a vacuum bleeder, used it, the hydraulic module does not have a bleeder so I bled the back line on it,lost on what to do. Brakes still spongey, brake an antilock light still on, any suggestions appreceated, thanks

 

[massacre]

 

[410Fortune]

1989 ford ranger has a RABS module on the drivers frame rail back by the rear axle.
It indeed DOES have a bleeder on it, you likely have some air in there
Also a 1989 the soft brake lines are old and should be replaced, these can cause a soft pedal

For the other guys:
In my experience if your brakes were decent before you changed things and now the pedal goes to the floor
You have a bad seal in the master cylinder
master cylinder seals go out often when bleeding from people pushing them when there is no fluid behind it, a master cylinder MUST be bench bled before installed into the booster.......
Also if you get air in your ABS pump, try driving it....drive it and mash those brakes, make the abs activate.
The air will move downstream where it can then be bled out.

 

[Danny c CARLILE]

1989 ford ranger has a RABS module on the drivers frame rail back by the rear axle.
It indeed DOES have a bleeder on it, you likely have some air in there
Also a 1989 the soft brake lines are old and should be replaced, these can cause a soft pedal

For the other guys:
In my experience if your brakes were decent before you changed things and now the pedal goes to the floor
You have a bad seal in the master cylinder
master cylinder seals go out often when bleeding from people pushing them when there is no fluid behind it, a master cylinder MUST be bench bled before installed into the booster.......
Also if you get air in your ABS pump, try driving it....drive it and mash those brakes, make the abs activate.
The air will move downstream where it can then be bled out.

Thank you so much

 

[IronCurtain]

View attachment 164455

What is that

 

[massacre]

What is that

I think that is the tool to bleed the HCU?

 

[CDW6212R]

I think that is the tool to bleed the HCU?

Yes, the one I have looks just about like it.