Suzuki AN650 2002 Service Manual page 362

9-90 CHASSIS
OVER-ADJUST PREVENTION MECHANISM
When rapid braking [ 1], the automatic brake-lock adjuster operation works too fast [ 2].
The caliper piston/adjust-nut is forced to stop [ 3] as soon as the brake pad contacts with brake disk, but the
adjust-bolt turns by inertia force [ 4] after that. The adjust-bolt stops after the adjust-bolt/nut clearance
becomes zero. On this account, the caliper piston/adjust-nut can not return back [ 5] using the elasticity
transform of piston seal when releasing the brake lever. It is the over-adjust condition.
Rapid rotation
Adjust-bolt
Adjust-nut
The spring is equipped between the caliper piston and the adjust-nut for preventing the over-adjust, serves
damper interm of rapid caliper piston movement.
The spring compress [ 2] as soon as the caliper piston moves exponentially [ 1], the adjust-nut moves [ 3],
[ 4] behind time. Here with, it is possible to make correct clearance of the adjust-bolt/nut because the inertia
force with rapid movement does not work the adjust-bolt.
Spring compresses
Hydraulic pressure
Rapid braking
Spring
Rapid braking
Caliper piston
Piston seal
Turn by inertia
Sudden stop
Impossible to return
Rotate
Spring tensions/
Adjuster-nut moves