WORKSHOP MANUAL
PARK
Chapter
EDITION
2020
PAGE
97 /
124
11. Bleed the air that has entered the system by
operating the traction pedal several times in
forward and reverse, and steer several times
in both directions.
12. At the end of this air purging phase and hav-
ing obtained the perfect functionality of the
machine, top up the hydraulic oil tank with
the amount of oil needed to reach the correct
level.
IMPORTANT
The topping up operation may also be necessary during the purging phase; it
is always necessary to avoid that the tank remains empty and the system sucks air. This could
result in damage to the transmission components. Frequently check the oil level and top up
from the cap (1) of the tank (2), whenever it’s necessary to restore the level.
13. Check that there are no leaks from the drain plugs.
8.4 DYNAMIC BALANCING VALVE (Smart by-pass)
8.4.1 Description
In the machines with a four-wheel drive, the hydraulic circuit is equipped with a dynamic balancing
valve for the correct balancing of the circuit.
When the machine is stationary, the dynamic balancing valve is open and allows the hydraulic
steering to rotate smoothly.
When the machine starts to move forward, the dynamic bal-
ancing valve closes automatically, the rear drive axle begins to
transmit motion and then, a few moments later, the front axle
also starts to engage the drive. The rotation of the hydraulic
steering remains fluid.
The time that passes between the engagement of the front axle and the rear axle is not normally
perceived by the user.
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