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Old 01-12-2012, 08:38 PM   #1
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Default pumping the parking brake?

ok. i dont know if this is normal or not. when i park my truck i usually just leave it in first. but on a hill if i want to let it warm up or anything i obviously need to use the parking brake. when i push it it goes almost all the way to the floor and will hold the truck on a small hill, but if i release it and pump it again it gets firm a lot quicker and holds the truck a lot better. is this normal or bad or is something broken?
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Old 01-14-2012, 11:42 PM   #2
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Any ideas
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Old 01-14-2012, 11:59 PM   #3
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I would guess that the cables are not moving freely inside the casing. Get a friend to help by stepping on the parking brake while you look for any signs of seizing.
Good luck,

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Old 01-17-2012, 03:30 PM   #4
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This is a weirdness that is understandable if you know how things really work.

The rear drum brakes on rangers are what are known as "servo actuated brakes"

Yes, the rear hydraulic cylinders move the brakes into engagement, but the primary braking force comes from a rotational "Wedging effect"

Rolling forward the front shoe contacts the drum and the rotational drag drives the show downwards away from the single anchor point at the top.

This wedges the longer rear show firmly into the brake drum and that is what provides most of the actual stopping force.

Because of the difference in spring rates and the longer show being in back
the brakes are not as effective when backing up.

The parking brake is mechanically actuated but the principle remains the same.

The fact is that after the brakes are applied parts inside move, in some cases
a suprising amount, and after they've moved they often move in a way that
offers you more mechanical advantage so you can get another click or so
and get better holding as a result.

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Old 01-17-2012, 03:41 PM   #5
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Ahhh, that makes sense. Thanks for explaining.

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Old 01-17-2012, 05:24 PM   #6
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The 93-98 rangers have an "in-service-able parking break" gotta replace the cables. Mine rolls with the parking break on. you can get a new cable at o'reillys or napa.

What it is, there's a self adjusting thingy under there and it'll stretch to where it wont self adjust, so you gotta get a new cable.

I figured that out, and then confirmed that was the problem with Lima Bean. its the front cable that's probably loose, it's just like a 2'-3'ft cable like on a bicycle.
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Old 01-17-2012, 06:12 PM   #7
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Originally Posted by Ak907Girl View Post
The 93-98 rangers have an "in-service-able parking break" gotta replace the cables. Mine rolls with the parking break on. you can get a new cable at o'reillys or napa.

What it is, there's a self adjusting thingy under there and it'll stretch to where it wont self adjust, so you gotta get a new cable.

I figured that out, and then confirmed that was the problem with Lima Bean. its the front cable that's probably loose, it's just like a 2'-3'ft cable like on a bicycle.
You didn't read a thing that Allan said.
If he can apply and release the parking brake the cable is not the problem, and there is nothing in the cable system for the parking brake that will stretch and wear out. That would be a dumb idea on the engineers part as the brake could be applied and that part stretch out and allow the vehicle to roll away
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Old 01-17-2012, 06:28 PM   #8
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You didn't read a thing that Allan said.
If he can apply and release the parking brake the cable is not the problem, and there is nothing in the cable system for the parking brake that will stretch and wear out. That would be a dumb idea on the engineers part as the brake could be applied and that part stretch out and allow the vehicle to roll away
Well SORRY I was just putting in something I've experience. geez, chill. That's what went wrong with my parking break, and I have searched it, and got under and looked at my own parking break.

I can apply and release my parking break and it'll hold, unless it's on a slope or a slick spot. And it says in my book that I can't service the parking break.
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Old 01-17-2012, 09:31 PM   #9
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Well SORRY I was just putting in something I've experience. geez, chill.
Take your own advice!

You posted something that made no absolute sense at all. You stated that there was/is a part in your parking brake system that stretched and gave you no hold from your parking brake. There is nothing from the parking brake pedal to the drums that can stretch. The cables will stretch and then break when enough pressure is applied. If they do break it is because of rust and not stretching. The should be a part by your front spring hanger on the rear drivers side that has an adjustment and connects the rear cables to the front, that won't stretch either. Like Allan said the only part of your rear brakes that actually hold anything is the front shoe. If the rear brake shoes are out of adjustment then yeah the pedal may be pumped to hold better.
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Old 01-17-2012, 10:39 PM   #10
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Quote:
Originally Posted by Explorin94 View Post
Take your own advice!

You posted something that made no absolute sense at all. You stated that there was/is a part in your parking brake system that stretched and gave you no hold from your parking brake. There is nothing from the parking brake pedal to the drums that can stretch. The cables will stretch and then break when enough pressure is applied. If they do break it is because of rust and not stretching. The should be a part by your front spring hanger on the rear drivers side that has an adjustment and connects the rear cables to the front, that won't stretch either. Like Allan said the only part of your rear brakes that actually hold anything is the front shoe. If the rear brake shoes are out of adjustment then yeah the pedal may be pumped to hold better.
Wait what!? There is nothing between the the parking brake pedal and the drums that can stretch, yet the cables WILL stretch and break. Im sorry but if you stretch a cable hard enough and enough times to or beyond its yield point it will fatigue and grow in length, especially cheap ass little 10-12 strand cable made in China. Even my high dollar cables i use as an ironworker to lift untold tons of steel beams ect... stretch and over time grow in lengh hence why they are inspected and certified regularly. My stuff is usually proof loaded to around 60% load of the minimum breaking strength, Consider constructional and elastic stretch beyond yield but before failure through a few 1000 cycles and your E-brake cables WILL grow in length. Feel free to correct me if im blowing smoke, i dont mind some learnin.
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