Honda CRF450R 2009 Service Manual page 512

HYDRAULIC BRAKE
DISASSEMBLY
Remove the bolls and brake disc cover,
Remove the caliper bracket from the caliper.
Remove the brake pad spring from the caliper.
Remove the brake pad retainer from the caliper
bracket.
Remove the caliper pin boot and bracket pin
boot.
Place a shop towel under the caliper to cushion the
piston when
it
is expelled.
Do
not
Dring the air
Apply
short bursts of air pressure to the fluid inlet to
nozzlflloo close to remove the pistons.
the inlel or the
piston may
be
forced
out
with
excessive force that
couki
cause injury.
Be
carsful 1101
to
damage
the pistOfl
sliding
surface.
16-26
Push the dust seal and piston seal in and lift them out.
Clean the seal grooves, caliper piston and caliper
piston sliding surface with clean brake fluid .
'09 shown:
DISC COVER
PAD SPRING
SEAL