Harbor Freight Tools PITTSBURGH AUTOMOTIVE 63391 Owner's Manual & Safety Instructions page 5

Brake Bleeding
1. Attach a 3" Hose (5) to the
bottom of the Suction Lid (2a).
2. Attach a 23" Hose (4) to the port on
the top of the Suction Lid that does not
have the 3" Hose attached, as shown in
Figure A. Then, attach the other end of
that 23" Hose to the Vacuum Pump (1).
3. Make sure the O-ring (11) is completely
seated into the groove on the top of
the Cup to provide a good seal. Firmly
attach the Suction Lid to the Cup (3).
4. Remove the cap from the vehicle's
master cylinder, and make sure the
master cylinder is full of brake fluid.
If not full, fill the master cylinder
to capacity with clean, new
brake fluid. (Use only the kind
of brake fluid recommended by
the vehicle manufacturer.)
23"
HOSE (4)
3" HOSE (5)
TAPERED
HOSE
ADAPTER
(6)
TO BRAKE CALIPER
BLEED SCREW
Item 63391
SUCTION
LID (2a)
PUMP
SCREW
BRAKE BLEED
SCREW ADAPTER
(9a, 9b, OR 9c)
For technical questions, please call 1-888-866-5797.
Note: Determine the proper brake bleeding
sequence from your vehicle service manual
(i.e., right rear wheel, left rear wheel,
right front wheel, left front wheel).
5. Connect the 23" Hose (4) to the
remaining port on the Suction Lid.
6. Insert the Tapered Hose Adapter (6)
into the 23" Hose. Connect the
other end of the adapter to the
Brake Bleed Screw Adapter (9).
7. Squeeze the Handle of the
Vacuum Pump 10 to 15 times to
create a vacuum in the Cup.
Note: The Gauge on the Vacuum Pump
should read at approximately 10 inHg.
Do not exceed 20 inHg. A greater vacuum
could damage the vehicle's brake system.
8. Open the vehicle's brake caliper
bleed screw, and allow brake
fluid to flow into the Cup until fluid
appears clear and free of bubbles.
Then, retighten the bleed screw.
GAUGE
23" HOSE (4)
O-RING (11)
CUP (3)
VACUUM
RELEASE
VALVE
FIGURE A
VACUUM
PUMP (1)
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