Bleeding Front Brake - Buell 2003XB9S Service Manual

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Bleeding Front Brake

NOTE
Hydraulic brake fluid bladder-type pressure equipment can be
used to fill the brake master cylinder through the bleeder
valve if master cylinder reservoir cover is removed to prevent
pressurization.
1. See Figure 1-7. With motorcycle in upright position,
install end of plastic tubing over front caliper bleeder
valve; place other end in a clean container.
CAUTION
Cover molded-in-color surfaces and right handlebar
switches and use care when removing brake reservoir
cover and adding D.O.T. 4 brake fluid. Spilling D.O.T. 4
brake fluid on molded-in-color surfaces will result in cos-
metic damage. Spilling brake fluid on switches may ren-
der them inoperative.
2. Cover body surfaces, right handlebar switches and
instrument panel to protect from spillage.
3. See Figure 1-8. Remove two fasteners from front master
cylinder cover.
4. Add D.O.T. 4 BRAKE FLUID to master cylinder reser-
voir. Bring fluid level to within 1/8 in. (3.2 mm) of molded
boss inside front master cylinder.
NOTE
Do not reuse brake fluid.
5. Slowly depress and release hand lever several times to
build up hydraulic pressure, then hold brake hand lever in
the depressed position.
6. While holding brake hand lever in the depressed posi-
tion, open bleeder valve about 1/2-turn counterclockwise.
Brake fluid will flow from bleeder valve and through tub-
ing into clean container. When brake lever has moved 1/2
to 3/4 of its full range of travel, close bleeder valve (clock-
wise). Allow brake lever to return slowly to its released
position.
7. Repeat steps 5-6 until all air bubbles are purged.
8. Tighten front caliper bleeder valve (metric) to 36-60 in-
lbs (4-7 Nm).
9. Verify master cylinder fluid level as described in step 4.
10. Attach cover to front master cylinder reservoir and
tighten fastener to 9-13 in-lbs (1.0-1.5 Nm).
11. Remove cover from molded-in-color surfaces, right han-
dlebar switches and instrument panel.
1-16 2003 Buell XB9S: Maintenance
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Figure 1-7. Front Caliper Bleeder Valve
8359
Figure 1-8. Front Master Cylinder Reservoir