Parking brake problem, handle popping back UP. - Defender Source
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  #1  
Old December 28th, 2009, 12:19 PM
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Parking brake problem, handle popping back UP.

Why can't I have the NORMAL problems with this truck?

Having an oddball issue with the parking brake the past week or so, and it appears to be related to the cable somehow. Symptoms are that when I try to disengage the parking brake, it wants to pop back UP about 2-3 clicks on its own. When it does this, you can hear that it's slightly scraping the brake shoes inside the drum. After tearing the whole brake drum apart, I can't say for sure I know where the problem is coming from.

After I took the boot off of the handing, it appears it's trying to push the cable back down when I disengage the brake, but it doesn't want to go that way on its own. This causes it to bend around in a loop right at the base of the handle. It's trying to spring back up when the cable is straightening itself again. The cable isn't seized at all, if I guide it with my fingers it will go the way it's supposed to and it moves freely.

Now, are the springs inside the drum supposed to be pulling the cable taught again? While I have it all apart, I'm going to give the whole expander assembly a good cleaning and re-lubrication. There isn't anything that I can find to be broken or out of place under the drum at all. Not sure what else to look for though

-Hans
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  #2  
Old December 28th, 2009, 08:23 PM
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When I first bought mine, it was leaking there for some time from neglect. My brake was doing something similar as well as not gripping at all. I replaced the seal and shoes, springs, everything. Havent had any trouble any more. I kinda want the disc conversion though. Seems a bit pricy, but zero movement of the truck when engaged would be cool.
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Old December 28th, 2009, 10:21 PM
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Well, not seeing anything obviously wrong, I just scrubbed it all down, greased it all up, and put it back together. Working fine now, and some odd clicking noise that had been driving me nuts for a year and a half is also gone.

-Hans
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  #4  
Old December 28th, 2009, 10:25 PM
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good deal man.
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Old December 29th, 2009, 06:20 PM
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Quote:
Originally Posted by huck1974
When I first bought mine, it was leaking there for some time from neglect. My brake was doing something similar as well as not gripping at all. I replaced the seal and shoes, springs, everything. Havent had any trouble any more. I kinda want the disc conversion though. Seems a bit pricy, but zero movement of the truck when engaged would be cool.
You mean one of those Xbrake disc brakes?
They're cool
http://www.x-eng.co.uk/X-Brake.asp?MID=31
and very well engineered
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Old December 29th, 2009, 08:32 PM
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yep, thats the one. It just seems about twice as much as it should be.
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Old December 30th, 2009, 04:04 AM
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Quote:
Originally Posted by huck1974
yep, thats the one. It just seems about twice as much as it should be.
You get what you pay for in this world.
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Old December 30th, 2009, 06:41 AM
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I always wondered why nobody offered a conversion to a more practical set of rear calipers, to make it a functional emergency brake as well as just a parking brake. There's got to be SOME set of rear calipers that bolt in there which have a parking brake feature built in.

-Hans
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Old January 7th, 2010, 06:11 PM
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I had a problem similar to Hans' last night.

After sitting for a month, the parking brake would not release. Pushing down on the handle it feels like cable is binding; and the handle wants to creep back up on its own. I climbed underneath and backed off the park brake adjustment bolt so I could move the truck, but the binding cable problem remains.

What is the general consensus? Take everything apart and clean/lubricate, and/or is there hardware in the brake drum assembly that should be replaced as a periodic service/maintenance item?
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Old January 7th, 2010, 06:35 PM
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Pull the driveshaft and drum and lube everything. Throw away the big retaining screw on the drum. Rebuilding is never a bad idea. I'm thinking it a ten year thing on mine as well as the seal back there that leaks all over everything.
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Old January 7th, 2010, 07:27 PM
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Quote:
Originally Posted by GYM View Post
I had a problem similar to Hans' last night.

After sitting for a month, the parking brake would not release. Pushing down on the handle it feels like cable is binding; and the handle wants to creep back up on its own. I climbed underneath and backed off the park brake adjustment bolt so I could move the truck, but the binding cable problem remains.

What is the general consensus? Take everything apart and clean/lubricate, and/or is there hardware in the brake drum assembly that should be replaced as a periodic service/maintenance item?
Once I got in there, it's a very simple mechanism and not much to actually break or wear out. A good clean and re-grease should be all it needs. The expander, from what I can tell, is the problem area that needs the most attention as far as cleaning goes. The parts all pop out nice and easy, and an old toothbrush can get into the whole bore of it.

If that doesn't solve it, the cable and external linkage are the only other moving parts to worry about.

-Hans
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  #12  
Old January 9th, 2010, 04:04 AM
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I always found it was the expander that gave trouble on the old style cable and rod system.
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Old January 19th, 2010, 12:29 PM
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I pulled park brake apart, cleaned, lubed and put back together. My cable binding problem remains. Cable does not fully retract back in to sheath. Cable insulation has worn by the heat shield where it passes over exhaust. Looks like it has gotten hot and I think that is what is causing cable to bind slightly.

What kind of a chore is it to replace cable? Looks straightforward...
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Old January 19th, 2010, 02:31 PM
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If you've pulled the brake apart the cable replacement is no big deal.
A pin secured with a split pin holds the cable to the hand brake lever in the cab
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Old January 19th, 2010, 02:34 PM
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LOL you would think that, but I couldn't get the pin out of there. Rusted in solid. I can always cut out the cross-pin if needed, but it require it this time.

-Hans
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