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Author Topic: rear brake of death  (Read 1152 times)

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BigRed

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rear brake of death
« on: February 17, 2009, 03:35:29 PM »
1972 cb750

So, I was driving home from work, road is wet from an earlier rain. As I'm slowing down i'm pressing my front and rear brake. I'm barely pressing the rear brake then i hear a click a click and my rear brake locks up for a second then goes back to norman again, almost layed the bike down.

anyone have any idea what the issue is?
« Last Edit: February 17, 2009, 03:55:16 PM by BigRed »
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KingCustomCycles.com

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Re: rear brake of death
« Reply #1 on: February 17, 2009, 03:45:33 PM »
Who's Norman?
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Offline Duke McDukiedook

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Re: rear brake of death
« Reply #2 on: February 17, 2009, 03:47:00 PM »
Drum brake I assume, year, type of bike?
Could be your drum mechanism is a bit sticky (Or return springs might be worn?). Might want to check the wear mark and tear into the drum to see if it needs a cleaning.
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Offline OldSchool_IsCool

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Re: rear brake of death
« Reply #3 on: February 17, 2009, 03:47:07 PM »
Is it the bike in your avatar (i.e drum brake not hydraulic disk)?  The cheeky answer is that the static friction of your brakes overcame the dynamic friction of your tire on the rain slicked road thus causing the tire to also dip into a state of static friction.

The clicks may be your brake pull rod stripping out of the adjuster nut, or the return spring stuck on something or the brake stay bar coming loose and slapping the frame as it rotates with the wheel.  Could be some debris or loose parts in the rear brake cover.

Check the brake rod, stay bar, spring and axle nuts.  Check that you have plenty of pad on the brake shoe and that the parts inside the rear brake are as they should be.

Glad you are OK!
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Offline Alan F.

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Re: rear brake of death
« Reply #4 on: February 17, 2009, 04:08:42 PM »
Another possibility is that the ancient brake shoe's friction material has cracked and seperated from the shoe.... Scary.
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Offline DaytonGuy

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Re: rear brake of death
« Reply #5 on: February 17, 2009, 04:19:48 PM »
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Who's Norman?

OK....nothing important to add, but that was funnier than poopoo.  I about fell out of my chair.

Very well done..... ;D
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Offline Alan F.

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Re: rear brake of death
« Reply #6 on: February 17, 2009, 04:22:30 PM »
+1
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Offline mystic_1

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Re: rear brake of death
« Reply #7 on: February 17, 2009, 04:35:36 PM »
Personally I'd be pulling the wheel off and getting eyes on the brake components before riding agian, unless you find a problem with the actuator rod as suggested above.

mystic_1
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BigRed

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Re: rear brake of death
« Reply #8 on: February 17, 2009, 04:55:30 PM »
Quote from: OldSchool_IsCool on February 17, 2009, 03:47:07 PM
Is it the bike in your avatar (i.e drum brake not hydraulic disk)?  The cheeky answer is that the static friction of your brakes overcame the dynamic friction of your tire on the rain slicked road thus causing the tire to also dip into a state of static friction.

The clicks may be your brake pull rod stripping out of the adjuster nut, or the return spring stuck on something or the brake stay bar coming loose and slapping the frame as it rotates with the wheel.  Could be some debris or loose parts in the rear brake cover.

Check the brake rod, stay bar, spring and axle nuts.  Check that you have plenty of pad on the brake shoe and that the parts inside the rear brake are as they should be.

Glad you are OK!
went down and checked it out, turns out my brake rod, stay bar, and tighters for the the drum where all loose.
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Offline UnCrash

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Re: rear brake of death
« Reply #9 on: February 17, 2009, 06:03:41 PM »
Quote
went down and checked it out, turns out my brake rod, stay bar, and tighters for the the drum where all loose.
  Yikes!

Every week I give my bike a good walkaround testing connections, nuts, ect.  Last summer I hadn't done it for 3 weeks, gave the bike a good walkaround and found 3 nuts missing from my front rotor!

Glad you didn't loose a part on the road -- tightening stuff up to spec has to be one of the easiest fixes on our bikes.
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Offline BobbyR

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Re: rear brake of death
« Reply #10 on: February 17, 2009, 06:13:00 PM »
Loctite
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Offline 754

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Re: rear brake of death
« Reply #11 on: February 17, 2009, 06:22:00 PM »
I am a bit lazy but the no maintainance plan can kill ya.

Dont hurt to look at the brake once in a while, see if the shoes are still in there.. and to check bolts on your bike.

 not even gonna ask how long it was like that..
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Offline Steve F

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Re: rear brake of death
« Reply #12 on: February 17, 2009, 06:27:59 PM »
Quote from: KingCustomCycles.com on February 17, 2009, 03:45:33 PM
Who's Norman?
The "cow" in City Slickers (not really a cow).
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