Mityvac MV6840 fluid dispensing system - Manual (Page 6)

Page Number - 6 Form 801193
The Mityvac Fluid Dispensing System is appropri-
ate 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
corrosive. 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 pres-
sure 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 connection.
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 coupler 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 res-
ervoir 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 cylinder, without first relieving the
system pressure.
10. Once you’ve proven all connections are secure
and the master cylinder adapter does not leak,
remove the lid w/ pump from the dispens-
ing 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 se-
curely.
12. Consult a service manual to determine the
recommended bleed pressure and the proper
bleeding sequence for the vehicle being ser-
viced.
13. Observing the pressure gauge, operate the
pressure 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 manufac-
turer’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 pres-
sure 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 cylin-
der as required, and replace the cap.
20. Dispose of any hydraulic fluid remaining in
the Dispenser. Do not store hydraulic fluid in
the reservoir. Clean the dispensing unit with
denatured alcohol and store it properly.
21. Test the brake or clutch system for leaks
before driving the car.
pressure BraKe Bleeding