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Bleeding brake system

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Old Feb 27, 2023 | 02:09 PM
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Bleeding brake system
I have a 88 f-150. It has rear ABS. And I was seeing a thread recently posted about a RABS bleeder tool. I need to replace the brake booster and master cylinder. Am I gonna have to separately bleed the RABS module? I’m gonna flush the system too. Will it work going Right rear, left rear, right front, left front to bleed it?
 
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Old Feb 27, 2023 | 02:14 PM
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I never have.
 
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Old Feb 27, 2023 | 02:36 PM
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Your sequence is correct.
 
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Old Feb 27, 2023 | 02:39 PM
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Bleed the electric module? No

The order is : right rear, left rear, hydraulic control unit, right front and last bleed the left front brake.
 
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Old Feb 27, 2023 | 03:35 PM
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hydraulic control unit, ^^^^^^From post above^^^^^
Can you elaborate on that? What is the Hydraulic control unit?
 
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Old Feb 27, 2023 | 03:54 PM
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Originally Posted by yeet
hydraulic control unit, ^^^^^^From post above^^^^^
Can you elaborate on that? What is the Hydraulic control unit?
The part on the frame rail by the fuel filter.



 
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Old Feb 27, 2023 | 05:09 PM
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Ahhhh...OK. I'm a recovering GM/Chevy addict. We called that the proportioning valve over on the dark side.
 
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Old Feb 27, 2023 | 05:42 PM
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Originally Posted by yeet
Ahhhh...OK. I'm a recovering GM/Chevy addict. We called that the proportioning valve over on the dark side.
That is not a proportioning valve. Only the rear brake lines run through it. There is a solenoid inside that is electrically controlled by the RABS module.
 
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Old Mar 28, 2023 | 08:44 PM
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AMSOIL sells 12oz bottles, how many will I need to completely flush the system?
 
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Old Mar 29, 2023 | 12:48 AM
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I go through a quart (32oz) pretty quickly bleeding brakes.
 
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Old Mar 29, 2023 | 11:09 AM
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I removed my rabs module. It wasn't working and I don't really like abs, so I tossed it. Easy brake bleeding and less to worry about.
 
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Old Mar 29, 2023 | 02:46 PM
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Originally Posted by IsaacCarlson
I removed my rabs module. It wasn't working and I don't really like abs, so I tossed it. Easy brake bleeding and less to worry about.
I did the same thing just made a break line to route around it. Breaks work just fine without it
 
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