Burnishing Brake Pads - Toro 500 EFI Service Manual

CHECKING/REPLACING PADS
The clearance between the brake pads and brake discs is
adjusted automatically as the brake pads wear. The only
maintenance that is required is replacement of the brake
pads when they show excessive wear. Check the thick-
ness of each of the brake pads as follows.
1. Remove the wheel corresponding to the brake being
checked.
2. Measure the thickness of each brake pad.
3. If thickness of either brake pad is less than 1.0 mm
(0.039 in.), the brake pads must be replaced.

NOTE: The brake pads should be replaced as a set.
4. To replace the brake pads, use the following procedure.
A. Remove the cap screws securing the caliper holder to
the knuckle; then remove the pads from the caliper.
B. Install the new brake pads.
C. Secure the caliper holder to the knuckle with new
" patch-lock " cap screws. Tighten to 20 ft-lb.
16
5. Install the wheel; then using a crisscross pattern,
tighten the wheel nuts in 27 N-m (20 ft-lb) incre-
ments to the final torque shown in the table below.
Steel Wheel
Aluminum Wheel (Black Nuts)
Aluminum Wheel (Chrome Nuts)
PR376A
Using an impact wrench could result in incorrect torque
which could damage the wheel or hub studs.
6. Burnish the brake pads.
BRAKE DISC
Using a micrometer, measure the thickness of the brake
disc in the contact surface. If thickness is 0.125 in. or
less, the disc must be replaced. To replace the brake disc,
see Drive System – Hub.
PR237

Burnishing Brake Pads

Brake pads must be burnished to achieve full braking
effectiveness. Braking distance will be extended until
brake pads are properly burnished. To properly burnish
the brake pads, use the following procedure.
Failure to properly burnish the brake pads could lead to
premature brake pad wear or brake loss. Brake loss can
result in severe injury.
54 N-m (40 ft-lb)
80 N-m (60 ft-lb)
108 N-m (80 ft-lb)
CAUTION
! WARNING
PR377B
PR941A