Question about 1976 BMW R 75-7

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Hello...where to get a back plate for points? and why after repeated servicing of front brake caliper,the piston does not retract enough? would appreciate positive info,thankyou!

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You can still order many parts for your bike from a BMW dealer. Look at Max BMW for the online parts fiche for your bike. Looks like the part you want is listed in the diagram at the link above. Kinda spendy. Have your tried Beemerboneyard or Motobins?

Does the piston move back at all? If not, you may have a plugged return port on the master cylinder or partially blocked brake hose. Can you force the piston back into the caliper with a C clamp? Also, check for corrosion around the piston (pull back the dust boot) that may prevent it from returning into the caliper. Probably need to rebuild the caliper, but some more investigation will lead you to the problem.

Posted on Oct 03, 2010

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Posted on Jan 02, 2017

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3 Answers

Is there any other way to get the rear caliper to retract on a 2009 Lincoln MKS other than buying a tool?


if pressure caliper use a c-clamp and old brake pad ---if twist back use a needle nose pair of pliers and insert the tips into the impressions and turn to retract

Apr 27, 2017 | Lincoln Cars & Trucks

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After replacing the front brake pads and rotors on my 2001 mustang the calipers are not releasing enough , you can hardly turn the front wheels by hand and the brakes are running hot . How do I get th


Calipers retract after the brakes are released by the slight wobble and rotation of the rotor. What is probably occurring on your vehicle is that the caliper pistons, having been extended due to the worn pads, may have developed rust ridges that prevent the piston from retracting completely. You may have to carefully extend the caliper piston(s) without dislodging them from the bore, then I would first use a brake cleaner on the piston surface. If that fails to work, very fine emery may work. Be sure to remove all residue to prevent seal damage. Do not use any unrecommended solvents as they can damage o-rings and seals

Oct 17, 2014 | 2001 Ford Mustang

1 Answer

How to retract brake caliper piston?


Hi, if this is a front caliper that is still on the rotor, I pry between the rotor and rear brake pad to push the piston in. I usually have to pull on the caliper a bit to get it retracted enough to get a screwdriver in between. If the caliper is already off the rotor, I leave the old inside pad on the piston and put a large c-clamp over the caliper to push on the pad and retract the piston. If this is a rear disk caliper or if you have any questions, please reply.

Jul 31, 2011 | 2004 Buick LeSabre

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Just doing brae pads on my 07 26 mini bus at the moment and the brake piston has jump forward ..... How do I push it back?


front calipers pistons straight in with c-clamp or piston retracting tool
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in piston face to install tool needed to performed work
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Apr 02, 2011 | Mercedes-Benz R-Class Cars & Trucks

1 Answer

On my 1986 GPZ600 the rear brake siezes up when I use it.


The pistons themselves are generally the problem. The pins and guides just stop the pads from slopping about. Take pads out and caliper off and remove piston and clean out receptable. Check piston seal ring and dust (or packing) ring are not rolled, twisted or damaged. Your pads may even be worn too thin and plunger is having to push piston too far out and ring seals are not sliding on the smoother surface of piston receptable. Hope this helps. Below is a link to a typicall disc brake in exploded view form with part names.
Cheers.

http://www.cmsnl.com/kawasaki-1986-a3-zx550_model12812/partslist/F2294.html

May 14, 2010 | Motorcycles

1 Answer

On my 1986 GPZ600 the rear brake siezes up when I use it.


Sounds like you need to service the caliper. Remove the piston from the caliper by pumping the brake pedal, be warned you will get brake fluid everywhere. Remove piston seals, dust and oil, you'll probably find that the grooves where they usually reside are full of 'crud' thoroughly clean the grooves, clean the seals then inspect seals for damage and replace if necessary, grease seals (high temp grease) and put back into caliper, wipe away excess grease. Inspect piston for corrosion, minor corrosion can be flatted back with 1200 grit sandpaper, if too badly corroded replace. lightly grease piston (high temp grease) and push into caliper. the piston should slide in easily by hand. Finally bleed caliper well, flush new fluid through entire system.

Mar 24, 2010 | 1987 kawasaki GPZ 500 S - GPX 500 R

1 Answer

How do i change the front brakes on a 1991 oldsmobile cutlass ciera. i already have the brake paids


Hello, open the hood locate your brake fluid take the top off, than you want to losen the lug nuts one the wheel enough so they turn by hand. Jack up the car high enough to get a jack stand under it and the wheel is off the ground. Once the car is supported securely remove the lug nuts and wheel. Once the wheel is removed remove the screw on the bottom of the brake caliper, remove the old pads. Rotate the caliper upward, using a C-clamp and a old brake pad push the piston back in the caliper. Position the old brake pad to cover the piston and the C-clamp in the center of the old brake pad and slowly turn till the piston is fully retracted in the caliper. Install the new pads, put the caliper back in position, put the caliper screw back in double check work. Once every thing looks ok put the wheel back on, only hand tighten the lug nuts, make sure the wheel is tighten evenly. Remove jack stand, lower the car tighten the lug nuts using a crossing pattern once that is done pump the brakes, till they get firm, after they get firm start the car pump the brakes a few more times. The fun part take it for a test ride but allow your self more than normal distance to stop.

Feb 14, 2010 | 1991 Oldsmobile Cutlass Ciera

1 Answer

Want to replace my own front brakes on 2003 outlander. cannot find detailed repair instructions anywhere. any ideas? thanks!


Hello, to replace the front pads first open the hood and remove the brake fluid cover (will make retracting the piston easier). Next losen the lug nuts till you can turn them by hand than jack up the vehicle and use a jack support stand. Once the vehicle is supported remove the lug nuts and wheel, remove the lower caliper screw and rotate the caliper upward. Remove the old pads, use one of the old pads and place it so it centers the caliper, using a large C-clamp position it with the solid end on the back side of the caliper and rotating handle contact the pad in the center or close as possible. Slowly rotate until the piston is fully retracted into the caliper, your brake fluid may run over but its ok. Install the new pads return the caliper to the normal position over the pads reinstall the lower caliper screw. Put the wheel back on tighten the lug nuts till the wheel is evely and firmly in its normal position. Remove the jack stand lower the vehicle, put the brake fluid cover back on and pump the brakes until they are firm and check the fluid, add some if needed. Tighten the lug nuts, check for leakes. After starting the vehicle pump the brakes a few times, now the fun part the test drive :) allow you self more than normal distance to stop. Tips, I always set the parking brake when working on the front brakes, some people use a 2x4 instead of a brake pad to retract the piston into the caliper, double check your work, i always do and take your time.

Nov 25, 2009 | 2003 Mitsubishi Outlander

1 Answer

Brakes


If its the front brakes you are working on and the piston won't retract into the caliper then you need a new caliper, or both actually. Calipers need to be replaced in pairs. If you are working on the rear then you need a special tool to turn the piston back into the caliper. you can get the rear disc brake tool at any auto parts store. Turn the piston clockwise to retract it, and pay attention to the little spots cut out of the piston that the tool grabs to turn it. They need to be at the top and bottom of the piston once you fully retract it or the little pin at the bottom of the inside brake pad wont sit against the piston. And once again if it still wont retract then you need to replace both calipers. Once you are finished you need to pump up the brake pedal and then pull up the parking brake lever and release it 10 to 20 times to adjust the piston.

Oct 22, 2008 | 1996 Saturn SL

2 Answers

Front Brake Pads locked up on Rotor


Have the brake pads been so very work they are down to the metal? This could cause the caliper piston to extend too far and not be able to retract properly.
Calipers Fail mostly from a cut in the rubber boot around the pistion dirt and debris get in there and rust the piston and it cannot retract properly Do they retract after they cool Down? if so the brake fluid has "boiled" if brake fluid is not changed about every 24,000 miles condensation builds up and lowers the boiling point of the brake fluid causing this problem.
Tell me does it happen after a long drive or siting a long time in heavy bumper to bumper traffic in hot summer weather? I recommend a complete brake fluid flush an change the calipers with NEW ones ot rebuilt and use dielectric grease on all points of metal to metal contact between the caliper an the mount bracket and thee ends of thee pada n the slide points they ride on and the pins that go through thecaliper and thread into the mount only dielectric not regular grease it will cause sticking and a worse problem than you have now.

Aug 25, 2008 | 2001 Dodge Caravan

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