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| Emergency/parking brake kits (Page 1/1) |
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Timantt2
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NOV 11, 06:26 AM
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theogre
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NOV 11, 03:03 PM
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Some links don't work... trips security, too long for tinyurl, etc.
Fiero P-brakes do work where you follow directions from Owners book.
Doesn't work then follow data from Factory Service Manual and my Cave Rear Brakes etc.
"Can't Balance" means exactly what?
Could be bad cable(s), cable(s) installed wrong, Bad caliper(s), or all, or Nothing because you think both will apply at same time as you watch. That often doesn't happen on Fiero or most any other vehicle no matter how cables are attach.
Cable tension to apply Only matters in last few mm or less movement on the caliper's arms to load the brake pads to hold car when Parked. Calipers and cables can move faster/easier on one side until then. After Need proper cable tension from 2 large springs on the caliper to make Hand lever to work right when you release the P-brake. Release often have one side moves faster/easier then other side too until the caliper arms are at the stops.
Example: Main cable Must Move freely as wheel cables move to apply and release the brakes. That Movement Is Part of the system's Equalizer. Problem is many people bend the main cable wrong and doesn't move right or frame/exhaust cut binds or melts the cable.
Related thread for Failing EU Inspection, MOT TUV etc. inspection, likely applies to you includes how to apply them.
http://www.fiero.nl/forum/Forum2/HTML/143201.html
Parts from Ebay are often counterfeit, crap or worse.
Mod'ing brakes w/ whatever "upgrades" often have problems. "Electric" P-brakes for old cars may not be legal and won't Pass inspections. Even if ignore that, very likely won't solve your problem.
Many other cars have "3 cable system" but equalize in another spot. Example: Many have cables to wheels attach to each other somewhere and passing thru a floating U piece that pull by cable/rod attach to lever/pedal you use to operate. Many of these have problems because no-one clean and lube w/ Brake grease and cable thru the U rust and grinds the U. Simple view how they work...
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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Timantt2
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NOV 12, 09:42 AM
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OK, great to see there was a long discussion of that topic, I just did not find it.
It is really is big pain in the ass to get parking brake work once a year for one one day for inspection.
Anyway, in order to adjust bot sides, it would make more sense to have two parking brake cables, one for each side, all the way from brake lever to both brake calibers. And then adjust both sides separately.
Something like this:
https://www.acedux.com/asse...ages/440487/1500.jpg
Now they are never balanced, other side may not engage at all, while the other side drags as much as fully engaged, and if you try to balance,, they most likely just switch the roles, and other side starts to drag etc.
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theogre
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NOV 12, 02:01 PM
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| quote | Originally posted by Timantt2:
OK, great to see there was a long discussion of that topic, I just did not find it.
It is really is big pain in the ass to get parking brake work once a year for one one day for inspection.
Anyway, in order to adjust bot sides, it would make more sense to have two parking brake cables, one for each side, all the way from brake lever to both brake calibers. And then adjust both sides separately.
Something like this:
https://www.acedux.com/asse...ages/440487/1500.jpg
Now they are never balanced, other side may not engage at all, while the other side drags as much as fully engaged, and if you try to balance,, they most likely just switch the roles, and other side starts to drag etc. |
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"It is really is big pain in the ass to get parking brake work once a year for one one day for inspection."
Very likely because you have bad rear calipers, cables or both and never replace them. See cave.
Just having to adjust every year screams you have bad parts and limping along to drive 30+ year old car. IOW Won't Pass Inspection is likely not only problem and brakes can Fail completely and without more warning.
Fiero and other GM cars w/ same Rear brakes, pistons problems can have "minor" issues that can "Warp" a rotor to Boil the Brake or cause a Fire. Too much rear pad clearance is just Early sign of piston problem. Piston can fail completely after that and Hard drag the pads close enough you keep your foot on the pedal.
P-brake cables are adjusted when installed and very rarely ever touch again. That's true for Fiero and 99+% of cars for North America, EU and some other markets.
"3 cable systems" are "dumb things" but work very well and why used on millions of vehicles.
Above cable example is used on millions of vehicle w/ rear Drum brakes for 50+ years. Even many New models use some version of same.
When P-brake doesn't work most problems are Maintenance or Service Brake Problems. (Service Brakes is Main/Hydro Brakes)
Example: Rear Drum brakes w/ both Service and Parking functions have auto adjust jack screws. 1 typical problem is the screws get frozen w/ rust. When the screw won't self-adjust the Service Brake can and often will still work but can have a low pedal problem while the P-brake often won't work the same as "Fiero Type" rear disk brakes.
Wheel cables are very well known for problems on every vehicle type with them... (Main cable to whatever can have these same problems but rarer then wheel cables for most cars.)
Freeze in winter. Often get crap on the cables driving work thru the jacket then freeze overnight.
Freeze/Binding from "rust."
Broken Jackets. Example: Jackets break often at crimp ends and easy to hind but can bind to apply, release or both.
Example: Many have P-brake release problems and Many blame "weak" springs at the caliper but often is cable binding. Only sometimes the spring are weaker the spec because can rust and thin out or break.
Fiero Main cable will have problems when installed wrong and bind the whole system. see Parking brake cable hooks (84-87) http://www.fiero.nl/forum/Forum2/HTML/143724.html Many install this so cable bends over shape frame etc. like some goes before left wheel cable. Nope.
Your "good idea" pic above is illegal in many places because it does not have any method of equalizing the cable loads. (Plus above likely won't work without major mod's to the car.)
IF you try to adjust Fiero P-brake by adjusting cables then very likely you prevent the caliper lever(s) returning to their stops on the calipers. This needs to be avoided at all times.
No equalizer then one rear will apply sooner then other at best. You can't drive without wearing pads and pads don't wear 100% the same. This is why Service Brakes need auto adjust on a wheels and P-brake cables have the Equalizer.
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Timantt2
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NOV 26, 02:02 PM
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^ Well, actually I have changed all brake parts except lever.
I have changed rear brake calibers already 4 or 5 times, most of the times because of the handbrake. Three years ago changed all cables, connectors and calibers, still it was a problem to get through inspection.
I have a big pile of rear brake calibers, since returning the core pays much more than importing new here. Finnish post is extremely expensive if you want to send something abroad, it is much cheaper to order something to here, I don't know why.
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wgpierce
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NOV 27, 08:27 PM
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That's strange that you've changed rear calipers 5 times (in how many years)?
Do you use the car much? Do you change the brake fluid? Do you use the e-brake?
I put rebuilt ones on the rear of mine 4 years ago and all still works fine. I do change brake fluid every 2 years though.
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