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5. Make sure the function knob on top of the cover is pushed inward (suction mode). And the discharge valve at
the back of the unit is pushed upward (suction mode).
6. For “Manual Operation”, raise the pump handle on top of the cover until it reaches its highest limit. Start
pumping the handle and the unit will begin to extract oil from the engine crankcase.
NOTE: The vacuum level will drop when the fluid level begins to reach the top.
7. For “Pneumatic Operation”, connect the shop air to the unit. Switch on the air and the unit will begin to extract
oil from the engine crankcase.
NOTE: Prior to bleeding, ensure the master cylinder is full of new manufacture’s recommended brake fluid. It is
recommended to use an automatic master cylinder refill kit with the vacuum bleeder to maintain the level of new
fluid in the master cylinder during the brake bleeding process. If using a manual refill kit, pump the unit until the
desired pressure is achieved.
Follow the instructions included to prevent air from being sucked into the master cylinder pistons, brake lines, and
wheel cylinders while bleeding the brakes.
1. Properly position the vehicle for safe convenient access to the brake bleed screw located on each wheel
brake cylinder.
2. Make sure that all bleed screws are clean.
3. Connect clean, regulated compressed air to the male quick change nipple extending from the vacuum bleeder
handle. If using a manual unit, pump the unit until the desired pressure is achieved.
NOTE: Refer to the vehicle manufacturer’s guidelines for the proper wheel bleeding sequence and vacuum
bleeding steps.
4. Slip the bleed screw adapter on the end of the bleed tube assembly, over the nipple of the bleed screw.
5. Operate the vacuum bleeder by squeezing the handle (allow a few seconds for the vacuum to build up in the
bleeder reservoir before suction occurs). Using an appropriate wrench, loosen/open the bleed screw slightly,
until the fluid is draining visibly through the bleed hose and into the reservoir.
NOTE: During the bleeding process, as brake fluid is being vacuumed through the bleed screw, air will also be
sucked into the bleed tube from around the bleed screw threads. This can give the misconception that air is
bleeding from the lines. However, this is normal. To prevent or reduce this introduction of air, you may coat the
bleed screw threads with silicon grease prior to bleeding.
6. Keep the bleed screw open until new fluid is visibly flowing through the bleed tube. This normally takes about
20 to 30 seconds).
7. Being careful not to over-tighten, close the bleed screw firmly prior to removing the bleed screw adapter or
shutting off the bleeder.
NOTE: It is important to ensure that the bleed screw adapter remains connected to the bleed screw, and that the
bleeder is still pulling a vacuum while the bleed screw is closed. This will help to prevent air from being sucked
back into the wheel cylinder from around the bleed screw threads before the bleed screw is tightened
and sealed.
NOTE: If a master cylinder auto-refill system is not used, be sure to periodically check the level and top off the
brake fluid in the master cylinder.
INSTRUCTIONS FOR BLEEDING HYDRAULIC BRAKE SYSTEM
