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Brake Assist Lines

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Old Dec 12, 2025 | 11:08 PM
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Default Brake Assist Lines

Anyone have a brarkebooster(or the hydroboost?) similar to the image below that can show me how the lines run. Mines disconnected and I'm not sure where the hook ups go.

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Old Dec 13, 2025 | 09:00 AM
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What lines? Electrical? Just put the plug back in. The vacuum line from the manifold goes to the nipple on the side of the supplemental brake assist motor and the motor mounts to the vacuum booster into the grommet. And hydroboost is the wrong question for you to ask. They are not even similar.
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Old Dec 13, 2025 | 10:45 PM
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Sorry should have added clarity, yes the vacuum lines. Electrically its hooked up, but no vacuum lines at all and i haven't seen anything that can run one too...must be missing something.

Yea reading through the various forums and old notes, I am getting confused between this booster and a hydro
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Old Dec 14, 2025 | 09:05 PM
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Originally Posted by mizzac
... no vacuum lines at all and i haven't seen anything...
Does it look different than your diagram and my picture?
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Old Dec 15, 2025 | 12:52 PM
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Same style unit, but no hoses and its just tucked into the corner against the firewall not mounted to anything. Looks like two bolts to mount it to the Booster, but not sure where to run the vacuum lines i guess.

Apprecaite it!
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Old Dec 15, 2025 | 02:02 PM
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Looks like it has ONE vacuum line, not "lines". That ONE would be large, like 3/8", and would go to an appropriately sized port on the intake manifold that goes straight into the plenum; probably on the back, or on the top near the back. Not sure if it needs a check valve or a filter in that line, or if the pump has one inside it. Looks also like it has a fitting on the back that just plugs into the port on the booster.
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Old Dec 19, 2025 | 09:15 PM
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Originally Posted by MikeGyver
What lines? Electrical? Just put the plug back in. The vacuum line from the manifold goes to the nipple on the side of the supplemental brake assist motor and the motor mounts to the vacuum booster into the grommet. And hydroboost is the wrong question for you to ask. They are not even similar.
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@MikeGyver Do you happen to have a photo of where those rubber hoses go?

Originally Posted by RB04Av
Looks like it has ONE vacuum line, not "lines". That ONE would be large, like 3/8", and would go to an appropriately sized port on the intake manifold that goes straight into the plenum; probably on the back, or on the top near the back. Not sure if it needs a check valve or a filter in that line, or if the pump has one inside it. Looks also like it has a fitting on the back that just plugs into the port on the booster.
IMG_0579.jpgIMG_0580.jpg
IMG_0578.jpg
Ya i def have two ports, looks like the mounting spot was used for the fuel reg .
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Old Dec 20, 2025 | 08:29 AM
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Old Dec 20, 2025 | 08:31 AM
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Maybe you should post pictures of your engine bay. It seems like you have something going on that you don't realize that you should tell us
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Old Dec 20, 2025 | 03:10 PM
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