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How to spread the brake calipers to reinstall rear brake on rotor?
I'm reinstalling the rear wheel after having a new tire mounted. I mistakenly pushed down on the brake pedal before the calipers were installed. Now the calipers are too close together to slide over rotor. Before I make a bad situation worse, can anyone tell me how to safely moved the calipers apart enough to mount back on the bike?
Thanks.
2014 RTL Platinum
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Active Member
I had the same problem spreading the rear pads to install the rear wheel and found out that you have to turn the piston to get it to retract. There are two holes in the piston that can be used. I stuck needle nose in the holes and turn the piston, in lew of having an actual tool.
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rear brake caliper
Please don't try and force it with a c-clamp. As stated by LJspydee there are two holes in the face of the caliper piston, it turns, with difficulty, CLOCKWISE using a set of heavy needle nose pliers. Turn clockwise until it will turn no further. Take care about the rubber boot while doing this. Let us know how you make out.
Al in Kazoo
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2018 F3-T
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Or see if you can't create your own Motorcycle Brake Caliper Pad Spreader that would work like the commercially available ones like
OTC Disc Brake Pad Spreader.jpg $22 at Walmart or this Quick Quad Brake Pad Spreader.jpg Probably a professional or local brake shop might have one.
Or maybe a local Autozone or the like would have a loanable tool.
I know I did this very same thing this last spring and I didn't have to use any spreader, but did use some of the squeeze grip type woodworking clamps and a paint stir stick laid across the caliper side pad.
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I thought doing this was just for the parking brake when you are putting new pads on? So what you're saying is that pushing the brake pedal down does the same mechanical function in the caliper as the parking brake.
I just looked at the service manual & you are correct. I always thought the pedal brake & parking brake functions in a caliper were 2 separate things but looking at the service manual shows that they work on the piston in the same way.
Because of the parking brake, the only way to get the piston back is to rotate it using a tool in the 2 holes. Thanks.
Last edited by SteveLaoyster; 09-27-2017 at 07:52 PM.
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How to spread the rear brake caliper
Remove pads and clips, use needle nose pliers to turn the piston back in clockwise until it is flush with the housing. reinstall pads and clips, place caliper and pads over rotor, move into position and replace the caliper bolts using blue lock tight, and the torque is around 70 ft lb on the caliper bolts. Oh and you need to hold your mouth just right....
All the great movements in the world began with a cup of coffee!
2018 F3-T
My mods: Can am Trailer hitch, USB and 12 volt power outlets, Gustason windshield, Bead rider seat cushion, battery harness for electric gear and battery tender, Time out trailer.
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Easy
Pete,
as Al said, needle nose pliers in the divots on the piston. Take a rag, cover caliper. Turn caliper to press against muffler. Push hard with pliers while turning clockwise. It will retract. Call me if you need help. Number below. Joe
Joe Meyer
Dealer for the Outlaw/ROLO laser Alignment system
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Originally Posted by IGETAROUND
Remove pads and clips, use needle nose pliers to turn the piston back in clockwise until it is flush with the housing. reinstall pads and clips
The Brembo brakes don't seem to have 'clips'. There is this one bolt that goes through one end of the pads. The other end of the pads clip into the caliper. The holes on the piston are visible and the needlenose pliers do fit into them as mentioned. Not the easiest thing to work on, but I've got them back together now and got my fingers crossed I don't get a brake failure warning.
Rear caliper 3.jpgRear caliper 4.jpgRear caliper 5.jpgRear caliper 6.jpg
Last edited by UtahPete; 09-29-2017 at 02:54 PM.
2014 RTL Platinum
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Very Active Member
I'd call Capt Joe after that invitation, Joe and Ann are working on Spyders every week I think.
Safe Rides,
David and Sharon Goebel
Both Retired USAF Veterans
2018 Anniversary Edition RT Limited
Baja Ron ultimate swaybar. Vredestein tires, Baja Ron Front Shock Pre-load adjusters, Pedal Box, See my Spyder Garage
IBA 70020 |
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Originally Posted by Joel The Biker
I think I read somewhere also, be sure not to turn the key on until you have reinstalled the caliper and PUMPED UP THE BRAKES UNTIL HARD, or you will get a "brake failure" code the first time you use the brakes. I know when I did the fronts, I was carefull to pump them up hard before starting the bike.
I guess I should have done this. I do have a brake failure warning and the bike is in limp mode. Nuts!
2014 RTL Platinum
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Very Active Member
He tried to warn you!
Not that big a deal.
Turn the key on and wait for it to fully boot up and the then press the mode button.
Press down on the brake pedal hard and hold it there.
Turn off the key and wait for it to fully shut down. Takes about 20 second. Wait 30 just to be sure.
Release the brake pedal.
When you turn the key on again. The fault should be gone.
2018 F3 LIMITED
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Originally Posted by billybovine
He tried to warn you! Not that big a deal. Turn the key on and wait for it to fully boot up and the then press the mode button. Turn off the key and wait for it to fully shut down. Takes about 20 second. Wait 30 just to be sure. Release the brake pedal. When you turn the key on again. The fault should be gone.
Well, it took a few tries before I realized I had not yet hooked up the VSS position sensor. So, did that, lowered it back to the ground, backed it out of the garage and VOILA! No codes or alarms or warning lights!
Thanks all you guys for your advice. I do appreciate it. Would not have tackled this job at all if I didn't think I had some recourse if I ran into trouble.
2014 RTL Platinum
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How to spread the brake calipers to reinstall rear brake on rotor?
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