Buell 2009 XB Series Service Manual page 120

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5. Inspect the outlet port that mates with the fluid line banjo
fitting. Replace the housing if any scratches, dents or other
damage is present.
6. Clean the reservoir diaphragm, stiffener and cover.
7. Clean the pressure relief channels (2) in the cover.
sm05442
Figure 2-39. Piston Bore and Fluid Passages
2-42 2009 XB Service: Chassis
sm05440
2
1. Drilled passages
2. Pressure relief channels
Figure 2-40. Fluid Passages and Relief Channels
Assembly
1. Lubricate master cylinder bore, piston and piston seals
with D.O.T. 4 brake fluid.
2. Push the rubber seal onto the piston of a master cylinder
piston set.
3. Fit the rubber cap to the small end of the spring.
Be sure circlip snaps in place. An unsecured circlip can
cause brake failure, which could result in death or serious
injury. (00513b)
4. See Figure 2-41. Insert the spring (1) with cap (2) into
master cylinder bore.
5. Insert the piston (3) with seal (4).
6. Secure the piston with circlip (5).
7. Fit rubber boot (6) over the piston and work the top ridge
on the rubber boot into the groove in the piston.
1
1
2