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If oil adheres to the brake pads after oil is added, or
if the brake pads are worn down to a thickness of 0.5
mm, or if the brake pad presser springs are interfering
with the rotor, replace the brake pads.
1.
Remove the wheel from the frame, and remove the
brake pads as shown in the illustration.
2.
Clean the pistons and
surrounding area.
3.
Place the bicycle so that the
reservoir tank is parallel to the
ground, and then remove the
reservoir tank cover.
4.
Push the piston back in as far as it will go, while
being careful not to twist it. (Note that some oil
may overflow from the reservoir tank at this time.)
5.
Install the new brake pads, and then install the pad
spacers.
Pad spacer
3 mm Allen key
Brake pads
3 mm
Allen key
Piston
Tightening torque:
2 - 4 N·m {18 - 35 in. lbs.}
6.
Depress the brake lever several times to check that
the operation becomes stiff.
7.
Check that the rotor and the brake pads do not
touch each other, and then check the oil level
(adding more oil if required). After doing this,
replace the reservoir tank cover.
Give the pad spacers to the customer also.
Adjustment when the pistons
are not operating correctly
If these pistons do not operate properly or if they
protrude unevenly, or if the brake pads remain in
contact with the rotor, adjust the pistons by the
following procedure.
1.
Remove the wheel and the brake pads.
Clean the pistons and surrounding area, and
remove the reservoir tank cover.
2.
Push the pistons back in straight, without bending
them. Note that some oil may overflow from the
reservoir tank at this time.
3.
Install the brake pads and the pad spacers.
4.
Depress the brake lever as far as it will go, and
then operate it several more times so that the
pistons all move to their initial positions.
5.
Remove the pad spacers, install the wheel, and
then check that there is no interference between
the rotor and the calipers. If they are touching,
adjust using shims.
6.
After checking the oil level, replace the reservoir
tank cover.
Brake fluid replacement
Attach a tube with a bag to the bleed nipple, and
then open the bleed nipple and drain out the oil. You
can operate the brake lever at this time to help the
oil to drain out. After draining the fluid, pour in fresh
brake fluid while referring to "Adding the brake fluid
and bleeding air". Use only genuine Shimano mineral
oil as the brake fluid.
Dispose of the waste oil according to proper country
and/or state disposal regulations.
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