Brake lines (vacuum?)
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Senior User
Joined: Oct 2005
Posts: 105
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From: Indianapolis
Brake lines (vacuum?)
OK, time to tap the experience of my fellow Super Duty truckers. I have changed disc brakes (pads, rotors and calipers) plenty of times on my cars, but never on my truck (99F250 V10). I've only had it one month, but I knew I needed to change the pads on the front.
Got into it, found that the driver's side caliper had frozen up, requires replacement. No problem. BUT, there is a vacuum line that runs to the back of the wheel assembly that was dry rotted and the long nipple was a bit corroded.
If I could, I'd post a picture in this message but I can't seem to figure out how. If anyone would like to see the pictures, go to http://pg.photos.yahoo.com/ph/terry4...UsW0DBHQtWhOOD
Anyway, is this some sort of vacuum assist?
Got into it, found that the driver's side caliper had frozen up, requires replacement. No problem. BUT, there is a vacuum line that runs to the back of the wheel assembly that was dry rotted and the long nipple was a bit corroded.
If I could, I'd post a picture in this message but I can't seem to figure out how. If anyone would like to see the pictures, go to http://pg.photos.yahoo.com/ph/terry4...UsW0DBHQtWhOOD
Anyway, is this some sort of vacuum assist?
Thread Starter
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Senior User
Joined: Oct 2005
Posts: 105
Likes: 0
From: Indianapolis
Ohhh, that explains the answer to my other post which questioned why I wasn't getting 4-wheel drive when I kicked it in. But, I thought I had to lock my hubs myself. The reason I thought that was because I can turn the center hub a half turn to right or left. How come? What is the purpose of that center turn know in the wheel? Thanks for your responses.
Postmaster
Joined: Jun 2004
Posts: 2,646
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From: Milky Way Galaxy
They're there just for back-up, you know, in case your vacuum lines get so dry rotted that they don't hold vacuum, or something crazy like that.
Seriously though, on normal manual hubs they are usually marked with FREE or LOCK. On our ESOF trucks they're marked with AUTO and LOCK. If everything is working as it should the hubs can be left in AUTO. Some people still prefer to get-out and put them in LOCK, just to be sure. There's nothing wrong with that as long as you remember to put them back in AUTO after you're done with 4wd.
Seriously though, on normal manual hubs they are usually marked with FREE or LOCK. On our ESOF trucks they're marked with AUTO and LOCK. If everything is working as it should the hubs can be left in AUTO. Some people still prefer to get-out and put them in LOCK, just to be sure. There's nothing wrong with that as long as you remember to put them back in AUTO after you're done with 4wd.
