How to Undo a Steel Line to Brake Hose Connection

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Removing a Brake Hose Hydraulic Fitting....5

How to remove a car's retaining clip and steel hose. Learn how to remove and replace worn brake hoses in this free video on car maintenance.

Part of the Video Series: How to Replace a Brake Hose
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Video Transcript

In this clip, we're going to talk about the proper way to remove and replace worn front brake hoses on a 1991 Ford Explorer. In this step, we're going to talk about moving the retaining clip out of the way and undoing the steel line to brake hose connection. As you can see, you can't really film in here at all, any way shape or form. I'll demo it for you on my new parts here shortly. What you're going to do is unscrew the line, once you get the clip out of the way. A lot of times the fitting will actually seize to the steel brake line. If that's the case on your vehicle, what you're going to have to do is apply some heat to that fitting in order to the break the rust loose from the line. If you were to just take a slip your wrench down and start leveraging on it, that'll twist your brake line, and if you twist it enough it'll actually break, and then you'll have to replace the whole section of line back to the master cylinder. So, make sure to pay attention that the line is not turning while your turn the fitting. You can purchase a small torch set at your local parts store in order to apply heat to it. If you have to heat up your connection, you're going to want to take and cut this brake hose, or open your bleeder. What will happen is you're applying heat to that. The fluid inside is going to start expanding at a pretty rapid rate. It'll eventually exceed the pressure that the hose is rated for, and it will blow up in your face. I've seen it happen to other mechanics who didn't know better. So, like I said, if you have to apply heat to your fittings, either opens the bleeder, or, in this case, since we're replacing the brake hose, you can go ahead and cut it off. They explode extremely loudly and spray very hot brake fluid all over you. Like I said, just to be sure, if you have to apply heat to it. Going to take an--we've got a finger tight here. Unscrew it, and pull out my hose. As you can see here, you can get a really good at why we're replacing it. And, let me show you this clip I'm talking about here. On most vehicles you can just pop the clip off, however on this particular vehicle, the clip is put on before the brake line is screwed in, like so. You can see how it's solid around there and around here. That means you just can't pop the clip off. You have to actually undo the line to get the clip off. You can replace these. I'm going to take and hammer mine back into shape before re-installation.


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