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There may be a parking brake adjuster, loosen it off, see if it helps? Next, get at the rear brake assembly, if there is a star adjuster loosen it off, hopefully, that will loosen the brake pads? At the rear brake assembly, maybe you can get at the parking brake cable?
I can't see anything from here.
Safety is your responsibility, if you get brakes released, you need to make sure brakes work properly before driving, again.
1)To replace the brakes in your car you
need to turn the lug nuts for all the wheels. 2)You will have to turn it one-quarter
counter clockwise with the help of tire wrench tool. 3)For this procedure the car needs to
be lifted to a height. So Turn off the key, raise the car and support it with
jack stands. Lift both the front and the rear of the car. 4)After that remove the lug nuts and
wheels carefully. 5)Now above the brake assembly you will
see the bolts holding caliper mounting. Remove the bolts. This will loosen the
brake pads .so remove the brake pads carefully. 6)Insert the new brake pads and
reassemble the brake caliper assembly. Assembly is the reverse of dis-assembly. 7)Refit all the parts properly which
you removed while removing the old brake out. 8)Fit all the bolts carefully to their
respective positions. 9)Fix the wheels and lug nuts. Tighten
the bolts properly. 10)Then Lower the Mercedes to the ground
from jack stands carefully. 11)Then turn the car ON and check the
pressure on the brake system by applying the brakes.
Place bike on center stand.
Jack the front of the bike to raise the front wheel off the ground. Be careful!!!
Remove the front wheel.
Remove the front fender and cross brace.
Disconnect the brake calipers from the forks.
Remove the air connections from the fork tops.
Loosen the fork leg clamp bolts on the triple tree.
Slide each leg out of the bike. Twisting while pulling often helps.
This can also be done without removing the front wheel but you will have to elevate the front of the bike another foot or so - just disconnect the air fittings and brake calipers, loosen the clamp bolts and drop the whole front assembly.
I generally use a pair of side cuts to loosen tension on the spring and it will come out of the socket. If it doesn't NEED to come off, leave it. Sometimes it can stay attached with little to no problems.
what kinda brakes are they? disc? or regular? if they're regular, flip the bike upside down, and use a wrench to loosen the nut holding the brake pad in place. should be easy to find near the rim. after you've loosened the nut, just slide the brake pads away from the rim to give it some space.
The wound steel cable that connects your brake lever to the brake pads can be adjusted via a screw or nut at the top of the brake pad assembly. Simply loosen the assembly and gently tug the wire end toward the front of the bike tire to tighten brake grip; tug it backward to loosen. Tighten the screw partially to hold the cable in place, test the brakes with the brake lever, and adjust again if necessary before fully tightening. It may help to put the bike on a stand or hold it so that you can spin the wheel, check that the brakes are adjusted so that the pads do not rub the wheel. You can do the same thing with the rear brakes. You will need a small tool to loosen and tighten the brake pad assembly; your household toolbox should have something :)
While you are adjusting the brake tension you should also check the brake pads for signs of wear. If your bicycle brakes squeal, show uneven wear or are perfectly smooth, go to a shop and get a new set! Regular brake maintenance is very important for bike safety.
Sounds like you have brake chatter. You need to "toe in" your pads on the front brake. Most new brake assemblies have a wedge shaped washer between the pad holder and where it mounts. If you loosen the nut that that holds the pad holder to the assembly and turn the washer you can see the relationship betwween the pad and the rim change. Turn the washer so the pad is toed in slightly(the end towards the front of the bike). If your brakes don't have the shaped washer you can put a crescent wrench on the brake arm and CAREFULLY tweak the toe in. Be gentle and good luck!
I found you a full color pictorial that will show you step by step how to remove the front brake assembly. Also, I would recommend changing the rotors while you have it apart, to prevent and brake pulsing after you replace the pads. I am not sure but I don't think you can machine Porsche rotors as the metal is too soft. if the rotors are lipped and you have a hard time removing the assembly after you remove the bolts, use a good screwdriver to wedge the pads away from the rotor, this will loosen the pad and allow you to remove the assembly.
Pictorial
LIFT FRONT OF VEHICLE,REMOVE FRONT WHEELS,OPEN BONNET,SEE MASTER CYLINDER.REMOVE CAP,PUT RAG AROUND TO CATCH SPILLAGE,LOOSEN BOTTOM BOLT OF CALIPER PULL PUL TOWARDS YOU,USE TOOL TO PUSH PISTON BACK,FIT NEW PADS AND RE-ASSEMBLE
Front brakes are simple, back brakes are a little harder. What you need is a C-clamp and some metric open ended wrenches. Lift the car and the hood, remove the tire, and open the cover on the brake fluid reservoir. Disengage the parking brake if back brakes are hydrolic. Loosen the 2 bolts that hold the caliper on and remove both pads. Compress piston with C-Clamp. If 2 piston, use a piece of wood or something that you can apply even pressure to both pistons. Be careful not to fracture the piston or rubber seal. Just be extra cautious when collapsing piston. Use a towel or anything to absorb the metal to metal force. Insert the new brake pads applying a small amount of blue grease to the back of the pad first. Install assembled caliper. Repeat for second front. The back brakes, if drum, require more parts to pull apart. My suggestion is to lift the whole back of the car. Remove both drums, might be tough, loosen adjuster gear and pull both brake pads off. Assemble compare to other side.
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