Toro 500 EFI Service Manual page 167

5. Remove the caliper holder from the caliper and dis-
card the O-ring.

NOTE: The O-ring is used for shipping purposes
and provides no function in operation.
6. Cover the piston end of the housing with a shop
towel; then keeping fingers clear of piston travel,
apply compressed air to the fluid port to blow the
piston free of the housing. Account for two seal rings
in the housing.
PR238
Make sure to hold the towel firmly in place or the piston
could be ejected from the housing causing injury.
7. Using an appropriate seal removal tool, carefully
remove the seals from the brake caliper housing; then
remove four O-rings from the brake caliper housing
noting the location of the different sized O-rings. Dis-
card all seals, O-rings, and crush washers.
CLEANING AND INSPECTING
1. Clean all caliper components (except the brake pads)
with DOT 4 brake fluid. Do not wipe dry.
2. Inspect the brake pads for damage and excessive
wear.
PR239B

NOTE: For measuring brake pads, see the Periodic
Maintenance - Hydraulic Brake System.
3. Inspect the brake caliper housings for scoring in the
piston bores, chipped seal ring grooves, or signs of
corrosion or discoloration.
4. Inspect the piston surface for scoring, discoloration,
or evidence of binding or galling.
5. Inspect the caliper holder for wear or bending.
ASSEMBLING/INSTALLING
1. Install new seals into the brake caliper housing and
apply a liberal amount of DOT 4 brake fluid to the
cylinder bore of the housing, seals, and brake piston.
Make sure the seals are properly in place and did not
twist or roll during installation.
PR713A
! WARNING
CAUTION
PR715
PR715
165