MAINTENANCE PROCEDURES
193
4.8.1.h
BLEEDING THE BRAKING CIRCUIT
WARNING
q
Oil spilled on the floor may cause the floor to become slip-
pery; immediately clean any dirty area.
q
The braking system must be bled with the machine posi-
tioned on level ground, the loader arm completely lowered,
the backhoe boom in transport position and the parking
brake applied.
q
Oils, filters, the coolant and the battery are considered spe-
cial waste and must be collected and disposed of accord-
ing to the regulations in force.
This operation is important, since it ensures the braking efficiency
and power of the machine.
Proceed as follows:
1 - Disconnect the brake pedals, so that they are independent of
each other.
2 - Apply a small pipe for the collection of the oil to the drain
screws (1).
3 - Remove the front guard (2) and the cap (3) from the reservoir
(4).
4 - Make sure that the oil in the braking system reaches the
maximum level.
5 - Press the left brake pedal thoroughly and, keeping it pressed,
loosen the drain screw (1) of the corresponding brake until
the pedal reaches the end of stroke.
Use a 13 mm wrench.
6 - While keeping the pedal completely pressed, tighten the
drain screw (1).
7 - Release the brake pedal, wait a few seconds and repeat the
operations described above until no air bubbles can be no-
ticed in the oil that flows out of the drain screw (1).
8 - Carry out the same operations for the right pedal.
9 - After bleeding the circuit, start the machine and check the
braking efficiency; if necessary, bleed the circuit again.
10 - Put back the front guard (2).
IMPORTANT
q
When bleeding the system, apply a small pipe to the
screws (1), in order to collect the oil.
q
The bleeding procedure must be carried out for both brak-
ing units, disconnecting the pedals from each other.
q
Frequently check the oil level in the braking system and
top up whenever the oil is near the minimum level.
q
To top up, use only new oil of the prescribed type.
RKAB3760
1
RKAB3770
2
RKAB3750
4
3
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Содержание WB93R-5
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