Bleeding The Hydraulic Brake System (ABS)

CHASSIS

EAS22780

BLEEDING THE HYDRAULIC BRAKE                                    A
SYSTEM (ABS)
EWA14000                                                                                              1
       WARNING
Always bleed the brake system when the
brake related parts are removed.
EC3P61012

CAUTION:
• Bleed the brake system in the following or-
  der.                                                          B
• 1st step: Front brake calipers
• 2nd step: Right front brake caliper (unified                       1
  brake system)
• 3rd step: Rear brake caliper
EW3P61010

       WARNING
Bleed the ABS whenever:
• the system is disassembled.
• a brake hose is loosened, disconnected, or                    C                   2
  replaced.
• the brake fluid level is very low.
• brake operation is faulty.
NOTE:
• Be careful not to spill any brake fluid or allow
  the brake master cylinder reservoir or brake
  fluid reservoir to overflow.
• When bleeding the ABS, make sure that there
  is always enough brake fluid before applying                   A. Front brake caliper
  the brake. Ignoring this precaution could allow                B. Right front brake caliper (unified brake
  air to enter the ABS, considerably lengthening                    system)
  the bleeding procedure.                                        C. Rear brake caliper
• If bleeding is difficult, it may be necessary to let          d. Place the other end of the hose into a con-
  the brake fluid settle for a few hours.                          tainer.
• Repeat the bleeding procedure when the tiny                   e. Slowly apply the brake several times.
  bubbles in the hose have disappeared.                         f. Fully squeeze the brake lever or fully depress
1. Remove:                                                         the brake pedal and hold it in position.
 • Right side cover                                             g. Loosen the bleed screw.
   Refer to “GENERAL CHASSIS” on page 4-1.                  NOTE:
2. Bleed:                                                       Loosening the bleed screw will release the pres-
 • ABS                                                          sure and cause the brake lever to contact the
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼                                throttle grip or the brake pedal to fully extend.
a. Fill the brake master cylinder reservoir or
   brake fluid reservoir to the proper level with               h. Tighten the bleed screw, and then release
   the recommended brake fluid.                                    the brake lever or brake pedal.
b. Install the diaphragm (brake master cylinder                 i. Repeat steps (e) to (h) until all of the air bub-
   reservoir or brake fluid reservoir).                            bles have disappeared from the brake fluid in
c. Connect a clear plastic hose “1” tightly to the                 the plastic hose.
   bleed screw “2”.                                             j. Check the operation of the hydraulic unit.
                                                                   Refer to “HYDRAULIC UNIT OPERATION
                                                                   TESTS” on page 4-60.

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