164
PR258
5. Secure the brake calipers to the knuckle with two
new “patch-lock” cap screws tightened to 20 ft-lb.
PR377B
6. 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.
7. Remove the vehicle from the support stand.
Hydraulic Brake Caliper
REMOVING/DISASSEMBLING
1. Secure the vehicle on a support stand to elevate the
wheel; then remove the wheel.
2. Drain the brake fluid from the caliper, hose, and
master cylinder through the bleed screw by pumping
the brake pedal.
PR235
NOTE: Whenever brake components are removed,
disassembled, or repaired where brake fluid is
exposed to air, drain all fluid and replace with new
DOT 4 brake fluid from an unopened container. Brake
fluid readily absorbs moisture from the air signifi-
cantly lowering the boiling point. This increases the
chance of vapor lock reducing braking power and
increasing stopping distance.
3. Remove the brake hose from the caliper and close
the bleed screw; then remove the caliper.
4. Compress the caliper holder against the caliper
(opposite the O-ring side) and remove the outer
brake pad; then remove the inner brake pad.
NOTE: If brake pads are to be returned to service,
do not allow brake fluid to contaminate them.
PR237A
Steel Wheel 54 N-m (40 ft-lb)
Aluminum Wheel (Black Nuts) 80 N-m (60 ft-lb)
Aluminum Wheel (Chrome Nuts) 108 N-m (80 ft-lb)
! WARNING
Toro recommends only authorized Toro ROV dealers
perform hydraulic brake service. Failure to properly
repair brake systems can result in loss of control caus-
ing severe injury or death.
! WARNING
Make sure the vehicle is solidly supported on the sup-
port stand to avoid injury.
! WARNING
Never let brake fluid contact the eyes. Damage to the
eyes will occur. Always wear appropriate protective
safety goggles and latex gloves when handling brake
fluid.
CAUTION
Brake fluid is highly corrosive. Do not spill brake fluid
on any surface of the vehicle and do not reuse brake
fluid.
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