Rfl Gear Unit Brake Start-Up; Rfd Gear Unit Brake Start-Up; Cwd And Rx Gear Unit Brake Start-Up - brevini RDF159 Manual De Instalación Y Mantenimiento

operation.
NOTE: for this operation it is recommended, after
having remove the rubber grommet from the bleeder
valve "X", to insert a piece of rubber hose with a
length of about 20 cm into that valve to collect the oil
with air bled off from the system into a can so that it
can be used again (do not dump this highly polluting
substance into the environment).
- Back off the bleeder valve one turn, fully depress the
brake pedal until only oil without any air flows from
the valve; immediately close the valve and release
the brake pedal.
NOTE: if oil does not flow out the first time the pedal
is depressed, close the bleeder valve and release
the pedal: then open the valve again and depress
the pedal and continue in this manner until oil flows
from the valve.
- Repeat this operation for all the wheel gear units
with these features installed on the vehicle. Top up
the oil in the braking system and make sure the brake
pedal remains high when it is depressed.
- Instead, if the pedal moves slowly down while it is
being depressed, this means that there is still some
air in the braking system and the brakes must be
bled again.
Parking brake
- Make sure that the terminal sleeve "C" of the
cable-brake sheath is inserted correctly into its seat
on the brake body.
- Insert the other terminal sleeve "D" in its seat on the
vehicle braking device, after having removed the nut
and counternut of the cable brake register.
- Tighten the nut and counternut until they contact the
cable-brake hook of the braking device, then tighten
the nut and counternut between them.
- Finally, check that the brake sheathes do not have
any sharp bends which might prevent the cable
from sliding smoothly inside them (thus reducing the
efficiency of the brake).
- Make sure the sheathes have extended protection
so they will not be damaged when operating on
rough ground.

6.3 RFL gear unit brake start-up:

Wheel gear unit equipped with negative multi-disc
hydraulic parking brake:
- Connect the
fittings of the
vehicle bra-
king system
to the brake
control hole
"A" (see fig.
No. 2) of all
t h e w h e e l
g e a r u n i t s
w i t h t h e s e
features that
are installed
on the vehi-
c l e . T h e n
b l e e d t h e
brakes and the braking hydraulic circuit.
Multi-disc brake bleeding operation
- Put the hydraulic circuit under pressure and bleed
all the brakes. Slightly unscrew the fitting of the
brake control while maintaining pressure until all the
air has been eliminated and only oil flows out. Then
re-tighten the fitting.

6.4 RFD gear unit brake start-up:

Wheel gear unit equipped with 2 types of hydraulic
brakes: negative multi-disc located at the input of
the gear unit for the parking brake and disc brake
with 2 brake clamps for service braking located on
the gear unit output.
Service brake
- Connect the fittings of the vehicle braking system
to the brake control hole "B" (see fig. No. 2) of the
2 brake clamps on each gear unit, for all the wheel
gear units with these features that are installed on
the vehicle. Once this operation has been comple-
ted, bleed the brakes (remove air from the braking
system), after adding oil to the vehicle braking system
(Brevini recommends oil DOT 3 - 4. SAE J 17.0 3).
Bleeding operation - See paragraph 6.2.
Parking brake - See paragraph 6.3.

6.5 CWD and RX gear unit brake start-up:

See paragraph 6.4.
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Fig. n. 2
X
A
B