Honda TRX450R Service Manual page 423

HYDRAULIC BRAKE
Remove the caliper pin bolt.
Pivot the caliper body up and remove it from the
bracket.
Remove the brake pads.
Remove the pad spring and caliper piston.
CALIPER BODY M CALIPER BRACKET
PAD SPRING
Be careful not to
damage the piston
sliding surface.
Push the dust and piston seals in and lift them out.
PISTON SEAL
Remove the O-ring.
Clean the seal grooves, caliper cylinder and piston
with clean brake fluid.
DUST SEAL
O-RING
19-23