Pressure Brake Bleeding - Mityvac MV6400 Manual Del Usario

PRESSURE BRAKE BLEEDING

The Mityvac Fluid Dispensing System is appropriate
for use as a pressure bleeder for hydraulic brake and
clutch systems. Additional accessories and adapters
may be required and are available from Mityvac for
performing this function.
WARNING: Hydraulic/brake fluid is hazardous and cor-
rosive. Take precautions to protect painted surfaces
and skin from exposure, and read and follow the fluid
manufacturer's warnings and instructions.
1. Park the car, set the parking brake, and turn off the
engine.
2. Open and secure the hood.
3. Locate the brake or clutch master cylinder and
remove the cap.
4. Extract as much used hydraulic fluid from the
master cylinder reservoir as possible, and refill it
with new fluid.
5. Select the appropriate master cylinder pressure
bleed adapter and install it securely onto the
master cylinder reservoir.
6. Before adding fluid to the Dispenser, connect the
fluid dispensing hose to the female quick-connect
coupler extending from the reservoir. Ensure the
coupler sleeve snaps forward to lock the connec-
tion.
7. Connect the other end of the fluid dispensing hose
to the male quick-connect coupler on the master
cylinder pressure bleed adapter. Ensure the cou-
pler sleeve snaps forward to lock the connection.
8. Ensure the shutoff valve is open, and operate the
manual pump to pressurize the system to 10 psi
(0.7 bar).
9. Watch the pressure gauge to ensure there are no
leaks. If the pressure drops, relieve the remaining
pressure in the system by tilting the pressure relief
knob located on the lid, remove and retighten the
lid from the dispensing reservoir and the adapter
on the master cylinder reservoir, and recheck the
system for leaks.
WARNING: Serious injury and/or equipment
damage can occur if the lid is removed from the
dispensing unit or the adapter from the master cyl-
inder, without first relieving the system pressure.
10. Once you've proven all connections are secure
and the master cylinder adapter does not leak,
Page Number - 6
remove the lid w/ pump from the dispensing unit
and add up to 2 quarts (2 liters) of a manufacturer's
recommended new hydraulic fluid from a sealed
container.
11. Reinstall the lid w/ pump and tighten it securely.
12. Consult a service manual to determine the recom-
mended bleed pressure and the proper bleeding
sequence for the vehicle being serviced.
13. Observing the pressure gauge, operate the pres-
sure pump to achieve the recommended pressure.
14. Connect the bleed reservoir to the bleed screw of
the first cylinder to be bled.
15. Open the bleed screw. Allow fluid to flow out until
only clear new fluid with no visible air bubbles is
streaming from the screw, and then re-tighten the
bleed screw to the manufacturer's recommended
torque.
16. Perform the same procedure on all remaining
bleed screws. Operate the pressure pump as
required to maintain adequate pressure.
Note: Do not allow the dispensing unit and master
cylinder reservoir to run dry. Use the pressure
relief valve to relieve the pressure and add new
fluid if necessary.
17. Once bleeding is complete, relieve the pressure
in the reservoir and master cylinder by tilting
the pressure relief knob located on the lid of the
dispensing unit.
18. Close the fluid dispensing hose shutoff valve, and
carefully remove the adapter from the master
cylinder, being careful not spill any brake fluid.
19. Extract excess fluid or top-off the master cylinder
as required, and replace the cap.
20. Dispose of any hydraulic fluid remaining in the
Dispenser. Do not store hydraulic fluid in the res-
ervoir. Clean the dispensing unit with denatured
alcohol and store it properly.
21. Test the brake or clutch system for leaks before
driving the car.
The Mityvac Fluid Dispensing System is appropriate for
use to refill or top-off sealed automatic transmissions.
Additional accessories and adapters may be required
and are available from Mityvac for performing this
function.
Form 801193