●Remove the piston by using the compressed air.
A piston removal method is shown below:
○Install a rubber gasket [A] and a wood board [B] with
thickness of more than 10 mm (0.4 in.) in the middle of
the calipers. Fix the rubber gasket and wood board
together with appropriate bolts and nuts as shown in the
figure. Open one of the oil ports [C].
○Slowly inject the compressed air [D] into the oil port
until the piston to
uches the rubber gasket. If the
calipers are in a half-open condition, the hose joint [E]
shall be blocked during operation.
Press the bolt [F] and nut: [G].
In order to avoid serious injury, do not put your
finger or palm in front of the piston! Otherwise,
the piston will crush the hand or finger when the
compressed air is injected into the calipers.
○Pull out the piston with hands.
●Remove the dust seal [A] and oil seal [B].
●Repeat the above steps and remove the piston from
the other side of calipers body.
Remark
○If the compressed air cannot be used, remove the
piston from the two calipers accord
ing to the
following method (the brake hose is connected with
the calipers).
○Prepare a container to hold the brake fluid.
○Remove the brake pad spring and brake pad (see
“Disassembling Front Brake Pad” in the “Brake”
chapter).
○Press the brake rod until the piston is pushed out of
the brake cylinder and then remove the calipers.
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