Zetor PROXIMA PLUS 90 2012, Operator'S Manual

Page: 178 / 212

177
ADJUSTMENTS
G735a E757
BLEEDING OF TRACTOR BRAKE
SYSTEM
Carry out bleeding of the brake system
of the tractor always in the following or-
der:
1. Pneumatic brake system for trailers.
2. Foot brakes of rear wheels.
3. Brake system of the front driving axle.
4. Hydraulic brakes of the trailer.
Carry out bleeding of the pneumatic
brake system for trailers and foot brakes
of the rear wheels with disconnected
brake pedals, separately for each wheel.
Carry out bleeding of the brake system
of the front driving axle and hydraulic
brakes of the trailer with coupled brake
pedals.
During bleeding watch level of the fluid in
the expansion tank to prevent suction of
air.
Brake fluid in the entire brake system
should be replaced after two years.
Warning:
With bleeding of a pneumatic
brake systém for trailers abd
brakes of rear wheels it is always
necessary to tread on one pedal
(1) by 7.5
+0.5
mm on the piston
rod of the main brake cylinder,
i.e. 3
+0.2
mm on the adjustment
screw (2) and bleed the system
using the other pedal. Insert a
gauge of the corresponding
thickness, i.e. 3
+0.2
mm, between
the pedal (1) and adjustment
screw (2) to ensure correct dis-
tance.