AVANT 528 - Drive Release and Anti-Slip Valve Options; Parking Brake Operation

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500 Series Operating instructions
Drive release valve (option)
The switch with the text LOCK
controls a valve, which is used to
divert the oil ow between left and
right side hydraulic motors. This
affects the pulling force.
LOCK OFF: In this mode, the hydraulic oil ows in series
from motor to motor. The wheels will roll more freely and
the loader leaves less tire marks on soft surfaces.
LOCK ON: In this mode the hydraulic oil ows in parallel
between the hydraulic motors in each side, similar to a
differential lock in operation. This improves the towing
capability of the loader.
Parking brake handle
Avant 520/528 is equipped with a
mechanical parking brake. The
parking brake is operated with
handel under the steering wheel.
• Locking: pull the handle and
turn down into locking position
• Releasing: turn up and let the
handle go down
Parking brake locks mechanically - spring-loaded pins
go into the holes of the parking brake drum on the front
wheels. Make sure that the brake locks properly by driving
a bit forward or backward.
Risk of sudden stop - Do not
engage the parking brake when
the machine is moving unless in
emergency. Using the brake while
moving may cause the locking of
wheels and sudden stopping of the
machine.
Anti slip valve (option)
The anti slip valve positively
diverts oil ow between the right
and left side hydraulic motors and
improves traction on slippery and
uneven surfaces. It is engaged by
switch in dashboard. As soon as
the switch is released, anti slip valve is released.
The function of the anti slip valve depends also on the
position of the drive release switch.
LOCK ON: Anti slip valve diverts oil ow between all four
hydraulic motors - all four wheels have best possible
traction. Use sufcient engine revs and press properly on
the drive pedal.
LOCK OFF: Drive released – the anti slip valve diverts
the oil ow between the front left and right hydraulic motor
only, not the rear hydraulic motors.