M7 SM-0502, Manual

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20
Vacuum bleed brake lines and wheel brake cylinders
Note:
Prior to bleeding, ensure that the master cylinder is full of new manufacture’s
recommended brake fluid. An automatic refilled kit is included with the unit to maintain
the level of new fluid in the master cylinder during the brake bleeding process. Follow the
instructions included with the kit to prevent air from being sucked into the master cylinder
pistons, brake lines, and wheel cylinders while the hydraulic system is bled.
1. Properly park the vehicle on the level ground and turn the
engine off, then for safe and convenient access to the
brake bleed screw that located on each wheel brake cylinder.
2. Make sure all the bleed screws are clean.
3. Connect compressed air 70 psi (4.8 bar) to 170 psi
(11.6 bar) by the nipple attached to the Air Valve ( I ) ,
located on one end of the Cover Housing ( A ) .
4. Connect the end of the proper adapter of Brake Tube
( F )
to the Fluid Inlet Cover
( G )
located on the top of the
vacuum bleeder unit.
Note: Consult the vehicle manufacturer’s guidelines for the
vacuum bleeding procedure and the proper wheel bleeding sequence.
5. Slip the Rubber Fitting ( J ) located on the opposite end of
the brake tube ( F ) , over the nipple of the bleed screw.
6. Operate the vacuum bleeder by turning the Air Valve
( I )
on, and press the Push Button
( B )
to start the vacuum
(allow a few seconds for vacuum to build in the bleeder
reservoir before suction occurs), and with the box-end
wrench, loosen/open the bleed screw slightly, until fluid is
visibly draining through the bleed hose and into the Tank
( D )
.
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 it is normal and does not think it’s a problem. To
prevent or reduce this kind of air, coat the bleed screw threads
with silicon grease before to bleed.
7.
Keep the bleed screw open until new fluid is visibly flowing
through the Brake Tube
( F )
(typically 20 to 30 seconds).
8. Close the bleed screw firmly, without over tightening, prior to
removing the Rubber Fitting and shutting off the Bleeder.