case of a drum brake). In case of problems with tight assembly, one of the
adapters can be additionally attached to the end of the hose.
h) Make a few movements with the pump handle to check the tightness of
the connection - after a few movements, it should start to create a vacuum
(see the pointer on the pressure gauge).
i)
With the vacuum created (0.5-1 bar), release the brake vent by gently
unscrewing it just far enough to let the brake fluid flow through the hose
into the container. When the fluid stops flowing, tighten the vent and
pump again to create a vacuum. Pumping with a pump replaces pressing
the brake pedal during replacement by a traditional method.
j)
When draining the vent, watch the brake fluid flowing down the hose -
the fresh fluid should be light golden in color and without air bubbles. At
the same time, during fluid change and bleeding, regularly check the brake
fluid level in the expansion tank so that its level does not drop below the
minimum. The full tank can be emptied at that moment by turning off the
brake bleed. Reattach the empty container to the lid, create a vacuum and
continue venting.
k) After bleeding the brake, tighten its vent, remove the hose (be careful so
the remaining fluid from the hose does not leak onto any of the brake
components), then wipe the protruding end of the vent with a cloth and
replace the protective cap (if one exists).
l)
Repeat with each remaining wheel brake. In general, the system is
considered to be vented if only fresh brake fluid flows out of each vent,
without any air bubbles.
By replacing the fluid with the above-described method, you are able to
flush the brake system with fresh fluid, i.e. replace it 100% with a new one.
The brake fluid is hygroscopic (absorbs moisture from the air) and has a
limited thermal resistance (it can be boiled), therefore regular control of
its condition and replacement is crucial for the correct operation and
reliability of the braking system of each vehicle.
3.4.
Cleaning and maintenance
a)
Use only non-corrosive cleaning agents for cleaning the surfaces.
b)
After each cleaning, all the parts should be dried well before the unit is used
again.
c)
Store the unit in a dry and cool place protected from moisture and direct
sunlight.
d)
Do not spray the unit with a stream of water or immerse it in water.
e)
Make sure that no water enters through the ventilation openings in the casing.
f)
Use a soft cloth for cleaning.