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-   -   Not enough space between brake pads (http://www.gz250bike.com/forum/showthread.php?t=3425)

Pete7874 07-08-2010 10:34 PM

Not enough space between brake pads
 
I am installing new pads. After I place both of them inside the caliper, they are pretty much touching each other and there is absolutely no space to squeeze the disc in-between them. I am guessing the caliper cylinder has contracted. How do I make space for the disc?

The manual says not to touch the brake lever while the pads are out, and I followed that. Do I need to release some brake fluid through the air bleeder valve the make the caliper expand?

Thanks.

BillInGA 07-08-2010 10:48 PM

Re: Not enough space between brake pads
 
The brake caliper piston adjusts to accommodate the decreasing width of the brake pads. I have used a c-clamp to compress the cylinder to make room for the new (and thicker) brake pads. I also put a rag between the clamp and the calipers.

Bill

ncff07 07-09-2010 12:25 AM

Re: Not enough space between brake pads
 
I've used a c-clamp on vehicles but not bikes but its the same principle and works good. Tighten it a little then give it a minutes for the pressure to back off then turn a little more till you get the space you need. I always leave the old pad on the caliper doing that too so it wont go back in at an angle.

Pete7874 07-09-2010 12:50 AM

Re: Not enough space between brake pads
 
Got it done. Had to release brake fluid from the system to be able to squeeze the piston back in. I did complete brake bleed afterwards. However, many times when I come to a stop now, I hear a strange rumbling sound coming from the front brakes. It's not squeak. It's more like a vibration. It even continues after I release the brake lever. Any idea what it could be?

Water Warrior 2 07-09-2010 02:42 AM

Re: Not enough space between brake pads
 
Quote:

Originally Posted by ncff07
I've used a c-clamp on vehicles but not bikes but its the same principle and works good. Tighten it a little then give it a minutes for the pressure to back off then turn a little more till you get the space you need. I always leave the old pad on the caliper doing that too so it wont go back in at an angle.

Excellent hint for the inexperienced(that's me)DIY mechanic. Might actually be doing that next week myself too. I will have the wheels off for new tires and that is a very good time to do an inspection of pads and assorted parts. Thank you so much. :2tup:

alantf 07-09-2010 04:09 AM

Re: Not enough space between brake pads
 
Quote:

Originally Posted by Pete7874
now, I hear a strange rumbling sound coming from the front brakes. It's not squeak. It's more like a vibration. It even continues after I release the brake lever. Any idea what it could be?

Did you lubricate the "pins" that the pads slide in & out on? This MAY be your problem (not lubricating them, that is) :)

bonehead 07-09-2010 07:23 AM

Re: Not enough space between brake pads
 
Just make sure one of the pads did not get installed backwards.

Sarris 07-09-2010 07:32 AM

Re: Not enough space between brake pads
 
Quote:

Originally Posted by Sarris
Re: Front brake pad troubles...
Open the bleeder, push the pistons back by hand (some brake fluid will come out of the bleeder) and close the bleeder. Insert the pads and top off the reservoir.

My previous post from a previous discussion..........

:)

Pete7874 07-09-2010 09:12 AM

Re: Not enough space between brake pads
 
Quote:

Originally Posted by alantf
Did you lubricate the "pins" that the pads slide in & out on? This MAY be your problem (not lubricating them, that is) :)

I did not. The service manual didn't mention anything about that. That is probably my problem. Can I spray some WD40 in there or do I need to take the whole thing apart again?

blaine 07-09-2010 09:29 AM

Re: Not enough space between brake pads
 
Quote:

Originally Posted by Pete7874
Quote:

Originally Posted by alantf
Did you lubricate the "pins" that the pads slide in & out on? This MAY be your problem (not lubricating them, that is) :)

I did not. The service manual didn't mention anything about that. That is probably my problem. Can I spray some WD40 in there or do I need to take the whole thing apart again?

NO! You need to put some Hi-heat grease on the pins and slides.Also make sure every thing is clean & rust free when it is apart. :2tup: :)


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