NO BRAKES!!!

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NO BRAKES!!!

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NO BRAKES!!! - 2/13/2007 3:08:11 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

Ok well got the truck on the road today..got the new (used rear) but when I went to ake it for a drive I notcied my brakes are horrible..the pedal goes straight to the floor..I didnt disconnect any brake lines in the process of changin the rear so i dont need to bleed the system...but when i did drive the truck to my shop in school the axles walked out on me and the drum separated from the brake assembely and i hit the brake when i saw that..could my wheel cylinder have jus blown up??but there was no brake fluid leaking from the cylinders or anything so im lost...

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

Post #: 1

RE: NO BRAKES!!! - 2/13/2007 3:25:58 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

Do any rear end work lately? Sounds like a C clip went awol. The drum may fall off if there is no wheel on, and no lugs installed. Where the shoes installed correctly?

I can't fathom what else could casue this.

(in reply to Chevyguy032)

Post #: 2

RE: NO BRAKES!!! - 2/13/2007 3:33:50 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

the axles walked out on the odl rear when i blew it not the new (used rear)

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to 4lowlife)

Post #: 3

RE: NO BRAKES!!! - 2/13/2007 3:39:08 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

ok, the old rear end, I see. Is there vaccum? (brake boost)

(in reply to Chevyguy032)

Post #: 4

RE: NO BRAKES!!! - 2/13/2007 3:45:31 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

ill have tocheck..i didnt disconnect any lines in the process of swapping the rears..but when a wheel cylinde blows will there be brake fluid leaking everywhere?? becuase i think thats what the problem might be the i dont got any fluid leaking anywhere so i dont actualy know if the cylinders went or not..

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to 4lowlife)

Post #: 5

RE: NO BRAKES!!! - 2/13/2007 3:54:36 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

yes there would be brake fluid if they go.

(in reply to Chevyguy032)

Post #: 6

RE: NO BRAKES!!! - 2/13/2007 4:05:41 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

yea i think the brakes need adjusting then..cause the left rear self adjuster is jammed up so i am just going to replace that and see if it helps any..

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to 4lowlife)

Post #: 7

RE: NO BRAKES!!! - 2/13/2007 4:48:40 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

All nice n rusty? always common. Might as well get a whole new hardware kit. Goods luck this weekend.

(in reply to Chevyguy032)

Post #: 8

RE: NO BRAKES!!! - 2/13/2007 7:32:55 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

great now my parking brake dosent work...

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to 4lowlife)

Post #: 9

RE: NO BRAKES!!! - 2/15/2007 2:36:20 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

just off the top of anyone's head do i have to take all the springs off the rear breaks to get out the self adjusters or could i take them off without taking all of it apart..

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to Chevyguy032)

Post #: 10

RE: NO BRAKES!!! - 2/15/2007 2:53:21 PM

swartlkk

Posts: 14499
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

I believe that you can remove them without pulling the springs, but I can't remember ever removing them without the springs... LOL

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Kyle-

04 Rainier
My Restoration Projects
Please Do Not PM for Tech Help

(in reply to Chevyguy032)

Post #: 11

RE: NO BRAKES!!! - 2/15/2007 3:40:25 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

would the brakes needing adjusted cause the parking break to not work?

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to swartlkk)

Post #: 12

RE: NO BRAKES!!! - 2/15/2007 4:56:22 PM

JustBlaze!

Posts: 74
Joined: 5/5/2006
Status: offline

It depends on the condition of your shoes and drum. From what I understand, your rear brakes and parking brake are activated by 2 separate systems. Regular brakes (ie. via brake pedal) are hydrolic, whereas your parking brakes utilize a mechanical cable. However, both operate the same shoes on the same drum. So I guess if your brake shoes or drum was really worn neither brakes would work. Also, if your shoes were also not adjusted (you said your self adjusters were siezed up), then the shoes might not be expanding far enough to cause the necessary amount of friction with the drum for your brakes to work.

I have found that the easiest way to test if your brake shoes are expanding far enough to have good contact with the drum would be to raise the back of your truck so that both rear tires are above the ground. Put the truck in neutral and try to spin the back tires with your hand, they should spin freely. Then apply the parking brake and try to spin them again with your hand. You should have a much more difficult time turning them, if you can even turn them at all. If you can still spin them easily, then your shoes are not expanding far enough and may need adjustment / replacement.

Hope this helps. Let us know what you find out.

_____________________________

1996 Blazer 4Dr 4WD 4.3L

(in reply to Chevyguy032)

Post #: 13

RE: NO BRAKES!!! - 2/15/2007 6:03:07 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

yea the shoes still have alot of life left on them..so im guessing it just needs adjustment..ill let you know when i bring it to my shop class and change the adjusters

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to JustBlaze!)

Post #: 14

RE: NO BRAKES!!! - 2/16/2007 1:13:39 AM

FieroGuy9890

Posts: 17
Joined: 2/14/2007
Status: offline

Yeah I'm also in an automotive class at school, if your adjusters are not working then that could easily be the cause for your rear brakes and parking brakes not to work. But your front brakes should still work okay and still slow the truck fairly well. Although you won't have as good of braking as you would will all 4 wheels working properly. Try changing the adjusters and getting everything adjusted correctly. hopefully that fixes your problem, if not you may have to consider bleeding your brakes anyway just incase some air found a way into your system. Have you checked the fluid level in the master cylinder?

(in reply to Chevyguy032)

Post #: 15

RE: NO BRAKES!!! - 2/16/2007 2:17:18 AM

20Blazer00

Posts: 862
Joined: 9/16/2005
Status: offline

Well check all the usual suspects fluid level in master cylinder. Also even though you did not remove anything from the lines it is always a good safety measure to bleed the brakes any time you do something related to them, especially R&R a rear differential. It is also possible that whether realizing it or not there might be a kink in the metal lines running across the differential if they were not carefully removed and supported while the diff's were swapped.

_____________________________

Mark

2000 Blazer LS 4dr 4.3L Auto
1999 Grand Am 3.4L 4dr SE2 - Traded
2000 Honda Odyssey 3.5L 5dr Mini-Van

(in reply to FieroGuy9890)

Post #: 16

RE: NO BRAKES!!! - 2/20/2007 9:41:11 PM

Chevyguy032

Posts: 170
Joined: 10/21/2006
Status: offline

Ok changed the adjuster..now brakes woerk like they did before and got the parking break back..so i am happy

_____________________________

1987 K5 Blazer
Motor: 350 TBI
Trans: 4 Speed Manual 4wd
Stance: 32x 11.5x15(stock)

(in reply to 20Blazer00)

Post #: 17