Braking News!
09 December 2003, 01:58 PM
#1
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Just found something out on my Impreza!
I can reverse with the handbrake on quite happily - but, cannot drive forward with it on!
Never noticed it before, probably something to do with leading edge and trailing edge shoes or something?
Just thought I would share that with you!
Pete
I can reverse with the handbrake on quite happily - but, cannot drive forward with it on!
Never noticed it before, probably something to do with leading edge and trailing edge shoes or something?
Just thought I would share that with you!
Pete
09 December 2003, 02:00 PM
#2
you are getting too old to drive. maybe you should consider giving up as you are probably a danger to other road users.
next week you will be posting about going up the motorway the wrong way.
next week you will be posting about going up the motorway the wrong way.
so what you are saying is don't park your car on a hill facing upwards 
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09 December 2003, 02:13 PM
#13
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not even in reverse!! coz yer speedo won't register your speed in reverse i believe!!!
and anyway....talkin about *****.....what was the first post on this thread again???!!!
no offence intended
[Edited by smb1 - 12/9/2003 2:16:44 PM]
and anyway....talkin about *****.....what was the first post on this thread again???!!!
no offence intended
[Edited by smb1 - 12/9/2003 2:16:44 PM]
09 December 2003, 02:16 PM
#14
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I you get the heads up display on from Defi you find out how fast you are going in reverse.
Belive me 30mph backwards is a lot faster than it seems going forwards! Obviously I remembered to take the handbrake off before doing it!
Belive me 30mph backwards is a lot faster than it seems going forwards! Obviously I remembered to take the handbrake off before doing it!
09 December 2003, 02:24 PM
#18
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[something to do with trailing edge shoes!!!]
so yours has been retro-fitted with classic drum brakes, eh?
nice.
i take it you are to the engineering world, what lambrusco is to wine....
haha
09 December 2003, 02:26 PM
#19
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I know this thread seems to be turning silly , but how many of us are going to try this over the next few days ?
Dave
Dave
09 December 2003, 03:56 PM
#24
This'll take it into the muppet forum...
It reminds me of the time my motorbike wouldn't seem to pull forwards... I got sudden visions of binding brakes etc then I discovered I could push it backwards quite easily with my feet
I got off to have a look and discovered that I had forgotten about the padlock & chain though the front wheel
Have a niceday now... y'all
Mick
It reminds me of the time my motorbike wouldn't seem to pull forwards... I got sudden visions of binding brakes etc then I discovered I could push it backwards quite easily with my feet
I got off to have a look and discovered that I had forgotten about the padlock & chain though the front wheel
Have a niceday now... y'all
Mick
09 December 2003, 04:17 PM
#25
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Isn't it pads on disc's, shoe's on drums, and trees to stops sled's
09 December 2003, 04:27 PM
#26
& when it gets too much brake dust in there - they squeal like a stuck pig - but its not worth the money taking 'em all to pieces to blow out 
Usually happens when you pull out of a side road in front of a group of young ladies who are looking at the scoob
The only cure is to yank the handbrake up briefly - not to be tried when turning
Usually happens when you pull out of a side road in front of a group of young ladies who are looking at the scoob
The only cure is to yank the handbrake up briefly - not to be tried when turning
09 December 2003, 05:09 PM
#27
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Thread Starter
bobbyh .... I am in Engineering and as I understand it they DO use a drum brake as the handbrake - it would appear that YOU are the thicko here!!
When the handbrake squeals, I just apply the handbrake at 30mph for about 300 yards (or something) as it says in the owners manual
Still, I never thought you could reverse with the handbrake on but then it locks solid when you try to drive forward??
Pete
When the handbrake squeals, I just apply the handbrake at 30mph for about 300 yards (or something) as it says in the owners manual
Still, I never thought you could reverse with the handbrake on but then it locks solid when you try to drive forward??
Pete
09 December 2003, 06:38 PM
#28
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Pete
It's all about wind-ups (you're good at 'em) or mechanical advantage for the techies 
"This article covers the basic workings of the brake drums and shoes. The pressure of the brake shoes against the drum starts with the force applied to the brake pedal.
The shoes are pushed out against the brake drum. One end bears against an anchor point, or heel, the other end is pushed out by the wheel cylinder. When the drum is rotated the friction force between the brake drum and the lining tries to turn the shoe around the anchor point. The shoe is then forced more strongly' against the drum, like a wedge. This is known as self-energization (mechanical advantage).
The wedging action starts at the toe, or the wheel cylinder end, and keeps increasing as it nears the anchor point. If the drum is revolved backwards (reversing) there is no self-energization. Therefore, you have less braking when going backwards.
The rear brakes have one leading shoe and one trailing shoe. Unlike the front brakes that have two leading shoes [you'll remember these, Pete]. When the brakes are applied the wedging action is only on one of the shoes, depending on the direction of rotation of the drum. The reason for this type of brake is so you will have stopping power by always having a leading shoe, and when using the hand brake you will always have a leading shoe which ever way you park on a hill."
This is written for disc / drum cars but the principles still apply...
It might be that you're wearing out your linings and the auto adjustment can't take up the slack in the system...
Apple
[Edited by Apple - 12/9/2003 6:42:25 PM]
It's all about wind-ups (you're good at 'em
) or mechanical advantage for the techies "This article covers the basic workings of the brake drums and shoes. The pressure of the brake shoes against the drum starts with the force applied to the brake pedal.
The shoes are pushed out against the brake drum. One end bears against an anchor point, or heel, the other end is pushed out by the wheel cylinder. When the drum is rotated the friction force between the brake drum and the lining tries to turn the shoe around the anchor point. The shoe is then forced more strongly' against the drum, like a wedge. This is known as self-energization (mechanical advantage).
The wedging action starts at the toe, or the wheel cylinder end, and keeps increasing as it nears the anchor point. If the drum is revolved backwards (reversing) there is no self-energization. Therefore, you have less braking when going backwards.
The rear brakes have one leading shoe and one trailing shoe. Unlike the front brakes that have two leading shoes [you'll remember these, Pete
]. When the brakes are applied the wedging action is only on one of the shoes, depending on the direction of rotation of the drum. The reason for this type of brake is so you will have stopping power by always having a leading shoe, and when using the hand brake you will always have a leading shoe which ever way you park on a hill."This is written for disc / drum cars but the principles still apply...
It might be that you're wearing out your linings and the auto adjustment can't take up the slack in the system...
Apple
[Edited by Apple - 12/9/2003 6:42:25 PM]
09 December 2003, 09:17 PM
#29
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i have a problem with my 98terzo in so much as that after applying the hand brake for any ammount of time, upon relising it i get a whistling noise from the rear, i have had the brakes stripped &cleaned by a freind who is a prodrive mechanic and the car had its 75,000 mile service last week and neither has solved the problem, any ideas????