Valtra 900 - K 2.5. Steering System

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K. Extra equipment
The trailer brakes do not operate, if only one of the
brake pedals is pressed. When the locking of the bra-
ke pedals is disconnected, the tractor brakes can be
used as steering brake.
NOTE: The trailer brakes do not work when using the
parking brake.
NOTE: When the engine is not running, the power bra-
ke of the trailer does not work.
3.
Changing and bleeding of the brake fluid
When changing the tractor brake fluid, to empty the pipes,
open the bleed nipples of the trailer brake release valve
(4) (both brake pedal circuits have their own bleed nipple
4A), and the bleed nipple (6A) of the brake valve (6).
The release valve (4) and brake valve (6) are situated on
the right hand side under the cab.The release --- and bra-
ke valves are situated lower down than the brake cylinder
of the tractor.Therefore they have to be bled before blee-
ding the brake cylinder. First bleed the valves (4A) of the
release valve, at the same way as when bleeding the bra-
ke cylinders, see page 88.
Then bleed the valve (6A) of the brake valve, the pedals
must be locked together.
4.
Specifications
--- Function with the pressure of the tractor hydraulics,
controlled by the braking valve
--- The control pressure of the brake valve will be led from
the brake pedal circles through the release valve.
--- Trailer brake connection to the tractor with quick---action
coupling
--- Pressure ratio 1:7,11 (the braking power)
K 2.5. Steering system