Fluid Change and Brake Bleeding
Beliebte Fragen im Forum
Eine Frage stellenEs gibt noch keine Fragen. Stelle du die erste!
Design and Maintenance Schedule
Avid® caliper brakes are designed for direct mounting post mounts on fork or frame. Adaptor brackets are used when mounting to IS mountings. The caliper will mount directly to post mounts.
Brake pads should be replaced when less than 3 mm or if the pads become contaminated with oils or brake fluid. To replace pads, remove wheel. Use piston press such as the Park Tool PP-1.2. Push the pads open to set the pistons back into caliper body. Squeeze tabs at end of pad together and pull pads outward and away from caliper. If pad return spring remains in caliper, push spring out from the top using a hex wrench. Place new pads over pad return spring. Spring should be sandwiched between new pads.
Avid® hydraulic disc brake calipers use DOT 4 or DOT 5.1 fluids. Do not use a mineral oil in this system. All models share the same concept and procedure for bleeding. The Avid brakes are bled from the caliper up to the lever. It's best to use the Avid® bleed kit with their hydraulic brakes. It includes two syringes with special threaded fittings, a bottle of DOT fluid, and an 8 mm crow's foot in 3/8 inch drive. Store syringes with tubing clamps open. One syringe is used to push fluid, and the second is used to catch fluid at the lever.
Before beginning the bleeding procedure, prepare the two Avid® syringes. Open tubing clamp on the syringe and fill about 1/2 full with only Avid® DOT 5.1 fluid. Never substitute mineral oil. Clamp tubing clip shut. Fill the second syringe only 1/4 full and close tubing clip. Hold syringe vertically with tip upwared and pull gently back on the plunger this reduces pressure in the syringe and will cause any air bubbles to appear in the fluid.
Allow these to rise to the top and tap the side gently to help dislodge then. Unclamp the tubing and push bubbles out the top. Close clamp and repeat process until fluid appears mostly clear on clamp. repeat process until fluid appears mostly clear on bubbles. This is called degassing the fluid. Some very small bubbles will always be present and will not be a problem in the system.
Avid® has several models of hydraulic brakes that share the same bleed kit and will be bled with a similar process. The Avid® kit is needed to effectively bleed their system. Do not use other syringes and tubing.