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Tractor Talk Discussion Forum

'97 Dodge 1-ton Van Brakes

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in-too-deep

11-29-2007 11:03:57




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I could use a little advice. The brakes have been kinda squishy recently. It stops fine, but it takes more pedal travel to get it done, and the several different people that drive don't like that at all. I assumed I just needed to bleed out the brake lines and cylinders and all would be well. I started at the LF (lot's of air came out), did RF, and then tried driving it, no improvement. Moved to the back, did LR, then RR(no air came out). No improvement. I took atleat 3 or 4 ounces out of each wheel, and the reservoir is still plenty full. My helper said the pedal was much stiffer when bleeding the back than in the front. Did I mess up the order? I couldn't remember if it was closest first or farthest first. Since it seems like the fronts are weaker, could the front segment of the master be leaking? Can wheel cylinders leak pressure without spilling fluid on the ground? There's no external leaks anywhere. Thanks for any advice, and I've got a couple tractor questions bouncing around upstairs to make up for this question.

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glennster

11-29-2007 13:02:52




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 Re: '97 Dodge 1-ton Van Brakes in reply to in-too-deep, 11-29-2007 11:03:57  
wheel cylinder will weep fluid when they are bad. i am betting the master is bad. probably the seal between the front and rear chamber is leaking.



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in-too-deep

11-29-2007 13:16:38




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 Re: '97 Dodge 1-ton Van Brakes in reply to glennster, 11-29-2007 13:02:52  
10-4. I'll get one tomorrow morning and slap her in. Thank you. Oh, didja take a look at that box of LP's you told me about?



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glennster

11-29-2007 16:52:15




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 Re: '97 Dodge 1-ton Van Brakes in reply to in-too-deep, 11-29-2007 13:16:38  
gotta go dig in the garage this weekend, pretty sure they are under a workbench, i'll post ya next week when i dig em out!!



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glennster

11-29-2007 11:16:13




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 Re: '97 Dodge 1-ton Van Brakes in reply to in-too-deep, 11-29-2007 11:03:57  
mike, its best to start at the wheel furthest from the master cyl and work your way up to the closest one last. you can also try and gravity bleed them, it works good to. to gravity bleed, open the master, fill it up, then open all the bleeders and let them drip for about an hour, keep the master filled. when done, just close all the bleeders. if you dont get a good pedal then, it is more than likely the master cylinder. if the rear seal goes on the master, it can suck fluid into the power brake booster chamber. you can pull the vacuum line off the booster and check the fitting for signs of brake fluid, if its there, replace the master .

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in-too-deep

11-29-2007 11:21:12




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 Re: '97 Dodge 1-ton Van Brakes in reply to glennster, 11-29-2007 11:16:13  
Hey Glenn thanks for the help. My name's Chris, though. I've got a brother named Mike, so you're close. I think I'll do the gravity bleed, 'cause I've got some other stuff I need to attend to. Can that master cyl. be rebuilt at all? A reman. unit at Napper is $40, which is do-able, but I'm just wonderin. Thanks friend.



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glennster

11-29-2007 12:14:45




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 Re: '97 Dodge 1-ton Van Brakes in reply to in-too-deep, 11-29-2007 11:21:12  
wow dint know he had a brother!!! some are rebuildable, but not worth it. by the time you buy the kit, dismantle, clean and hone it, its just cheaper to swap it out. bench bleed the master before you put it on, it makes bleeding quicker, clamp master in vice, install rubber lines back into master (the new master may come with the little hoses), and then cycle the fluid thru the master till all the air comes out.

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in-too-deep

11-29-2007 12:48:38




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 Re: '97 Dodge 1-ton Van Brakes in reply to glennster, 11-29-2007 12:14:45  
Alright, gravity bled the front a ton, probably got close to a cup out of each side. I also pulled the master off the booster, and I don't see any fluid, nor was there any in the vac line. I tightened the bleeder screws back up and I still don't have much pedal. It builds pressure, but I can push through it all the way to the floor. I know I've got a bad cylinder, but is it for certain the front side of the master? Or can a wheel cylinder show these symptoms without leaking externally?

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JGarner

11-29-2007 13:20:52




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 Re: '97 Dodge 1-ton Van Brakes in reply to in-too-deep, 11-29-2007 12:48:38  
If a wheel cylinder is leaking that badly the garage floor or driveway will tell you. I just replaced the rear wheel cylinders on my 99 D1500 pick up (my driveway told me which one was leaking). Should have done it when I replaced the brake shoes but got lazy.
Its probably your master cylinder. Try pushing the pedal down as it is slowly moving down and you know seals somewhere are leaking let it up quick and them jamb down on it hard. If it holds then there's about a 99% chance its its your matster cylinder seals. Sometimes a quick hard jab will flare them out and make them seal off for a driveway test. Can't do this when you are driving!! Get rebuilt master cylinder. By the time you figure out all your labor for disassembly, honing (buying a hone if you don't have one) and reassembly the price of the rebuilt looks pretty good.

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in-too-deep

11-29-2007 15:36:34




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 Re: '97 Dodge 1-ton Van Brakes in reply to JGarner, 11-29-2007 13:20:52  
Yup. Couldn't find a rebuild kit for the master anyway. Thanks for replying. I've got my morning figured out already.



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