Anti-Lock Brake Control Assembly (ABCA): Disassembly
- Remove six-gear cover-to-modulator Torx head screws and separate gear cover from modulator. If modulator is only unit being replaced, mark modulator drive gears before removal so that they can be installed onto new modulator in same location. Remove three modulator drive gear-to-modulator drive shaft retaining nuts and remove gears from modulator.
- Remove four motor pack-to-modulator Torx head screws and separate motor pack from modulator. Remove two modulator-to-master cylinder through-bolts and separate modulator from master cylinder. Reomove two transfer tubes with O-rings from master cylinder or modulator. Remove through-bolt O-rings from master cylinder and modulator.
CAUTION:
While removing retaining nut, DO NOT
allow the gears to turn, since the modulator piston can hit top of modulator bore, damaging the piston. Place a screwdriver through the holes in the gears (not between the gears) into the recessed hole in the modulator base. See Fig 1
.