Equus 3660 - Hand Vacuum Pump & Brake Bleeding Kit - Manual (Page 21)

3660 19
Air in the brake system hydraulic lines can result in a "low" or "soft"
brake pedal. To remedy this problem, the air must be bled from the
hydraulic lines. The vacuum pump provides a simple and effective
method of bleeding air from the brake system.
Use the following procedure to bleed air from automobile brake lines.
NOTES:
• Make sure all brake-bleeding nuts are clean prior to beginning the
brake bleeding procedure.
• Bleed the brake system in the following order (for most vehicles):
a) Master cylinder: If the master cylinder needs to be bled, consult
the vehicle’s service manual and follow the manufacturer’s
instructions for procedures.
b) Combination valve bleeder screws: (if equipped);
c) Wheel cylinders and calipers: Procedures and sequences for
bleeding wheel cylinders and calipers very widely from one
manufacturer to the next. Always consult the vehicle's service
manual and follow the manufacturer's recommendations for
the proper procedure or sequence to follow when bleeding wheel
cylinders and calipers.
• Check the fluid level in the master cylinder frequently during brake
system bleeding, and top off as needed with fresh, clean brake fluid.
1. Assemble the fluid evacuation/brake bleeding kit as described on
page 16.
2. Select the appropriate bleed screw tapered adapter:
• Tapered adapters fit inside the brake-bleeder screw, and
should be inserted tightly into the bleeder screw with a
pushing, twisting motion.
NOTE: On some bleeder screws, the clear tubing can be used
directly on the bleeder screw without an adapter. Push the tube over
the top portion of the bleeder screw, ensuring that a sealed condition
exists. If unable to achieve a sealed condition, use a tapered adapter
as described above.
3. Attach the selected adapter (if used) to the open end of the 24-inch
(61cm) piece of tubing.
4. Remove the bleeder screw. Temporarily plug the bleeder screw hole
(use the plug supplied with the accessory kit, or similar) to prevent
the leaking of brake fluid onto the brake assembly.
5. Wrap teflon tape on bleeder screw threads, re-install and tighten
bleeder screw on brake assembly. Take precaution not to cover the
bleed hole on the side of the bleeder screw when wrapping it with
Teflon tape.