So why would the parking brake start having issues

Tiny
ONLY CHEVY
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  • 3 POSTS
  • CHEVROLET SILVERADO
I engaged the parking brake at work and when I went to release it, the cable broke but the brake is still engaged. Is there anyway to dis-engage the brake.

Thanks
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Monday, February 22nd, 2021 AT 5:54 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Which cable broke? Front, middle, or a rear? Drum or disc brakes?
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Monday, February 22nd, 2021 AT 5:54 PM (Merged)
Tiny
ONLY CHEVY
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It is the release cable inside that cab that you pull to release the brake. It is disc all the way around.
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Monday, February 22nd, 2021 AT 5:54 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
On the same release lever there should be a small arm that points to the firewall, push it down and it will release, or if not get a screw driver and pull in the spot the cable attached to!
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Monday, February 22nd, 2021 AT 5:54 PM (Merged)
Tiny
ONLY CHEVY
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That worked. Thanks
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Monday, February 22nd, 2021 AT 5:54 PM (Merged)
Tiny
WILLIAMROBERTS1991
  • MEMBER
  • 2 POSTS
  • 2000 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
I know how to adjust the parking brake. My question is how do I know when it has proper tension? I've heard that when you spin your wheel and tire while elevated on a jack or stands that it should spin one revolution. Reason I'm asking is gas mileage. Thanks for reading. I don't have a problem donating, I have a problem giving out my card info. Sorry dudes.
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Tuesday, February 23rd, 2021 AT 9:42 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Depends on whether you have rear disc or drum brakes. With disc brakes with the parking brake built into the calipers, those do not self-adjust like front ones do. They adjust by working the parking brake multiple times until the pistons come out and the pads contact the rotors. If the cables are rusted tight, you have to work each caliper's parking brake lever by hand, usually with a large pliers. Once adjusted that way, the calipers will continue to self-adjust from there.

If you have drum brakes or the parking brake is a drum brake inside a rotor, the adjustment is very forgiving. The goal is to reach good pedal pressure with the pedal about halfway to the floor. The initial shoe adjustment is done by observing how much you can shift the rotor left and right as you slide it over the shoes. There's no need to have a little drag on it like you start out with on regular drum brakes because there's more than enough pedal travel to achieve good pressure. Even 1/8" of clearance is not exactly excessive. If the pedal goes further than halfway down after the shoes are adjusted, readjust the main cable to make it tighter.
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Tuesday, February 23rd, 2021 AT 9:43 AM (Merged)
Tiny
WILLIAMROBERTS1991
  • MEMBER
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Hey thank for the reply, I have disc brakes front and rear, the parking brake pads are behind the rear rotors as you
Know, there is a circular knob I guess you could call it the when you tighten will expand the parking break rotor/pads. I just want to know when enough is enough and not too much.
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Tuesday, February 23rd, 2021 AT 9:43 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
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When the pedal travels less than halfway to the floor. That will provide some allowance for the cables to stretch. Lining wear isn't a concern as it is with regular drum brakes because parking brake shoes don't wear from use. They typically last the life of the truck unless they rust off the shoe frames.
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Tuesday, February 23rd, 2021 AT 9:43 AM (Merged)
Tiny
TREBOR1
  • MEMBER
  • 2 POSTS
  • 1990 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
I read a post with same problem but answer didn't help, very short and not detailed. I replaced shoes and drums and had to adjust star wheel all the way in to get drum over shoes. I though star wheels self adjusted when backed up each time you hit brakes, true or false. As a side note I never have understood how a star wheel moves since it's anchored at each end. Anyway I also thought you could move star wheel manually thru drum but no way on these drums no access. Pedal movement not bad, what is spec on how far it should depress before braking? Mine probably an inch and a half. But e brake goes to floor, with no braking. So to recap main issue, how to adjust star wheel manually once drums on and will they auto adjust in reverse? One more note/question, if one side E brake is disconnected will other side still engage? I ask because a friend has a year older Silverado and he accidentally took e brake cable off and well one more question, how do you get it back on with the spring? I tried to help him. Very difficult to compress spring and slide back on plate. Thinking maybe napa sold some sort of small spring compressor but they had no idea. I realize that maybe too much to answer sorry for multiple questions.
Thanks if you can help
Bob
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Tuesday, February 23rd, 2021 AT 9:50 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Rear braeks shold adjust by them selves after initial installation and adjustment. The star wheel has to go down to properly adjust it as well as all items on shoes installed correctly. A lot of times the parking brake strut or one of the other parts isnt' put in correctly and you end up with no parking brake. To get eh spring on the cable back I use a pair of dykes to pull it back an dhold it while putting cable back to adjuster leg. It' s not easy. On a Chevrolet or GM product because they use an equalizer the one parking brake will not work as they are pulled at the same time. The tool that was sold to you is for the pakring brake adjustment at the equalizer not to compress springs. But autoparts guys don't know what they are doing anyhow when it comes to actually working on a car as most have never done it. Brake shoes shold be adjusted to.010-.020 from drums with a gauge most mechanics go by feel so that parking brakes will work an d as far as pedal travel fluid in master due to disc brakes will determine how far your pedal goes. Or pad wear as well. See pics
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Tuesday, February 23rd, 2021 AT 9:50 AM (Merged)
Tiny
TREBOR1
  • MEMBER
  • 2 POSTS
Thanks. Actually just realized I never lubed starwheel. Lithemn grease best just like caliper bolts? And how do you get a gauge inside a drum for measurement? Move Starwheel down to move shoes out is that correct? And pretty sure these new drums had no knockout spot to knockout to get to starwheel, is that possible? Will try the dykes. Now if I read correctly, pedal movement is only affected by front brakes? So by pedal movement alone my rear shoes may not even be engaging at all? I always thought if rear not engaging pedal would continue to the floor? Where is the equalizer for E brake and what kind of adjusting does it need? Thanks again. Great site. Will defiantly donate to the cause with my next issue, and being I drive a 1990 year, Silverado there will be more issues!
Bob
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Tuesday, February 23rd, 2021 AT 9:50 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The gauge is a specialized one that measure out side diameter of drum an dbrake at same time just adjust them to get a slight drag on them. The parkingbrake adjust was sent in last reply in pic. There are no pics just look about in middle of truck along parking brake cable you'll see it. The front brakes are par tof pedal movement but most braking is done by discs so if fluid is low it can effect pedal height as well as improperly adjusted rear brakes.
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Tuesday, February 23rd, 2021 AT 9:50 AM (Merged)

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