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Summary of Contents for Avid Technology BBDB
- Page 1 B B A A L L L L B B E E A A R R I I N N G G D D I I S S C C B B R R A A K K E E S S E E R R V V I I C C E E G G U U I I D D E E...
- Page 2 Exploded Views Foot Screw Ball-Bearings Lockring Outboard Pressure Foot Spring Adjuster Plate Upper Cable Drive Cam Seal Boot Spring Torque Arm Fixed Cam Flat Lockring Cable Housing Ferrule Washer Retainer Inboard Adjuster Torque Arm Knob Hex Hole Fixing Nut Washer Outer Caliper Body Seal Outboard Adjuster...
- Page 3 TABLE OF CONTENTS SECTION I - Introduction page 2-3 SECTION II - Disassembly page 4-8 SECTION III - Cleaning & Inspection page 9-10 SECTION IV - Assembly page 11-21...
- Page 4 The most common problem that doesn’t require disassembly: A common BBDB call we get is about a caliper with the outboard pressure foot dislodged. If the outboard adjustment knob is turned too far clockwise without the rotor in the caliper (wheel off or caliper removed), the outboard pressure foot can be pushed out of the drive cam and float free in the caliper body.
- Page 5 Torque Specs: Lockring 140-150 In. Lbs Torque Arm Fixing Nut 55-60 In. Lbs Truss Bolts 50-55 In. Lbs Tools needed: 3/8 drive ratchet, Avid MDT-1 lockring tool, 11mm socket, 11mm box-end wrench, 1.5mm and 5mm hex wrenches, flat-blade screwdriver, torque wrench (50-150 In. Lbs range), small needle-nose pliers or a Schrader-valve tool. Shop supplies: Degreaser or solvent, mild soap, grease (see below for grease recommendations), a small brush, and thread-lock such as Loctite 272.
- Page 6 Disassembly TYPE N TYPE F STEP 1: PREPARE FOR DISASSEMBLY Remove the cable anchor bolt and plate, then pull the cable housing and inner wire free of the caliper. Remove the boots, and, if working on a TYPE F caliper, the separate housing ferrule in the cable stop.
- Page 7 TYPE F TYPE N STEP 3: INSTALL PAD SPACER Turn out the inboard adjuster (counter-clockwise) until there is enough clearance between the pads for a 2mm pad spacer. Insert the spacer, then turn in the inboard knob (clockwise) until it stops. Check the torque arm for movement.
- Page 8 TYPE F TYPE N D. TYPE F - Remove the torque arm, outer body seal, and spring together, then remove the hex-hole washer. E. TYPE F - Tip the bike to allow the spring adjuster plate and lockring retainer to fall into your hand.
- Page 9 TYPE F TYPE N STEP 5: FREE LOCKRING Using the Avid MDT-1 Lockring Tool and a 3/8 drive ratchet, break the lockring free. Now remove the caliper from the bike. STEP 6: REMOVE LOCKRING Using the MDT-1 by hand, completely remove the lockring.
- Page 10 TYPE F TYPE N STEP 9: REMOVE INBOARD PRESSURE FOOT Turn the inboard pressure foot clockwise until it is free, then remove it through the main body bore. STEP 10. REMOVE INNER BODY SEAL There is one split in this seal for installation and removal purposes.
- Page 11 Cleaning&Inspection STEP 1: CLEANING Clean all metal parts in solvent, including the cable anchor bolt and plate, and for TYPE F brakes, the separate cable housing ferrule. Clean the cable seal boots, outer caliper body seal, and inner body seal in mild soap and water. Rinse and dry all parts completely.
- Page 12 STEP 3: SMALL PART INSPECTION Inspect the small parts as follows: -check ball bearings and cam ramps for excessive wear. NOTE: It is normal to see ball tracks in the cam ramps. -check the threads of the drive cam, foot screw, lockring, inner pressure foot, cable anchor bolt, and torque arm fixing nut for damage.
- Page 13 Assembly TYPE F TYPE N STEP 1: INSTALL INNER BODY SEAL Orient the inner body seal with the groove facing down, then insert it into the main body bore. Locate the seal into its recess and seat it completely with your finger. Groove Seal Recess STEP 2: GREASE THE BODY...
- Page 14 TYPE F TYPE N STEP 5. RE-MOUNT CALIPER Re-mount the caliper onto the bike. STEP 6: INSTALL PADS & SPACER Install the pads and spacer into the caliper and turn the inboard adjuster knob clockwise to lock into place. STEP 7. GREASE CAM PARTS Grease here Grease very lightly the following parts in preparation for assembly:...
- Page 15 TYPE F TYPE N STEP 8. INSTALL FOOT SCREW Using small needle-nose pliers or a Schrader valve tool, thread the footscrew into the drive cam completely, but do not tighten. STEP 9. INSTALL OUTBOARD PRES- SURE FOOT Engage the stem-end of the outer pressure foot into the hole in the end of the drive cam and install by firmly pressing it straight in.
- Page 16 TYPE F TYPE N STEP 11: INSTALL CAM ASSEMBLY A. Hold the cam assembly by the drive cam while keeping pressure on the fixed cam with your thumb and index finger. This serves two functions: 1. It keeps the ball-bearings properly positioned in their ramps.
- Page 17 TYPE F TYPE N STEP 14: INSTALL LOCKRING RETAINER TYPE F - Install the lockring retainer, aligning the cut-out in the retainer with the tab on the fixed cam. TYPE N - Install the lockring retainer, aligning the tab on the retainer with the cut-out in the fixed cam.
- Page 18 TYPE F TYPE N STEP 17: INSTALL HEX-HOLE WASHER Place the hex-hole washer over the drive cam shaft, engaging the flats on the shaft. STEP 18: APPLY THREAD-LOCK Apply a high-strength thread-lock such as Loctite 272 to the drive cam threads. Be careful not to allow any thread-lock to enter the area around the footscrew.
- Page 19 TYPE F TYPE N STEP 20: INSTALL OUTER SEAL Place the outer body seal on the spring, engaging the spring tab into the hole in the boot. STEP 21 (TYPE N ONLY): INSTALL SPRING ADJUSTER Turn the spring adjuster screw counter-clockwise until the bottom is flush with the bottom of the adjuster.
- Page 20 TYPE F TYPE N STEP 23: INSTALL TORQUE ARM TYPE F - Install the torque arm by first engaging the spring tab into the hole on the back side of the arm, then pressing the arm onto the flats of the drive cam shaft.
- Page 21 TYPE F TYPE N STEP 24: INSTALL FLAT WASHER Place the flat washer over the drive cam shaft and against the torque arm. STEP 25: INSTALL DETENT WASHER Place the detent washer over the drive cam shaft and against the flat washer with the rounded edge up.
- Page 22 TYPE F TYPE N STEP 27: INSTALL OUTER KNOB Install the outboard adjuster knob by aligning the rectangle tab of the foot screw with the rectangular hole in the knob then pressing it on firmly. STEP 28: INSTALL CABLE SEALS TYPE F - Push the upper cable seal on to the cable ferrule and place it into the cable stop.
- Page 23 STEP 30: REMOVE PAD SPACER Turn both pad adjuster knobs completely counter-clockwise and remove the pad spacer. STEP 31: SET UP Set up the brake by following the procedures in Avid’s BBDB Installation Guidelines.
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