Brake Master Cylinder - Yamaha MM700A Manual

Projection
WARNING
Never reuse a piston seal after removing.
The seal may leak due to damage or age de-
terioration.
10. Carefully install the new piston seals into the caliper
grooves. Make sure the seals seat evenly all the way
around the groove.
11. Coat the piston with DOT 4 brake fluid.
12. Position the piston with the caliper bore so the open
end faces out. Push the piston evenly into the caliper bore.
Make sure the piston does not cock to one side during in-
stallation; push the piston in until it bottoms.
13. Install the brake caliper assembly as described in this
chapter.

BRAKE MASTER CYLINDER

Refer to Figure 14.
1. Position the vehicle on level ground and set the park-
ing brake.
2. Disconnect the parking brake cable from the control
lever (A, Figure 15).
3. Unscrew the brake lever pivot bolt nut (A, Figure 16)
and washer. Remove the brake switch (B). Then reinstall
the washer and nut to prevent loss.
CAUTION
Cover the area around the master c-ylinder
with a heavy cloth or plastic tarp to protect
it from accidental brake fluid spills. Brake
fluid will damage painted or plastic sur-
faces. Immediately wash the surface using
soapy water and rinse completely.
4. Clean the top of the master cylinder of all dirt and de-
bris.
5. Remove the screws securing the cover (B, Figure 15).
Remove the cover and the diaphragm.
I f using a cooking baster for this purpose,
DO NOT reuse it for cooking purposes be-
cause there will be brake fluid residue
within it.
6. Using a shop syringe, draw all the brake fluid out of the
master cylinder reservoir.
7. Place a shop cloth under the brake hose fitting to catch
any spilled brake fluid that leaks out.
8. Unscrew the fitting (Figure 17) securing the brake
hose to the master cylinder. Do not lose the sealing
washer. Tie the loose end of the hose up to the handlebar
and cover the end to prevent the entry of moisture and for-
eign matter. Cover the loose end with a reclosable plastic
bag.
NOTE
The parking brake control lever components
will be loose when the clamp i s removed in
the following step.
9. Remove the clamp bolts and washers securing the
master cylinder (C, Figure 15) to the handlebar and re-
move the master cylinder.
10. Install by reversing the preceding removal steps
while noting the following:
a. Install a sealing washer on the brake hose fitting be-
fore installation.
Install the brake hose into the master cylinder so the
paint mark on the hose fitting is up.
c. Tighten the brake hose fitting to 30 N*m (22 ft.-lb.)
and the jam nut to 14 N*m (89 in.-lb.).
d. Bleed the hydraulic brake system as described in
this chapter.