Adjustment; Cogged Belt Tension; Bleeding Of Tractor Brake System - Zetor PROXIMA HS Series Operator's Manual

Almost all the following works require certain experience and more exacting service and
diagnostic equipment. That's why we recommend to do the works at specialized or authorized
workshops.

Cogged belt tension

With proper cogged belt tension the bending of belt must
be 5.5 mm with force effect of 25 N on a single belt.
Perform cogged belt tension to prescribed value after
releasing tightening screws (1, 2).
* Cogged belt tension of air-condition compressor
With proper cogged belt tension, bending of belt must be
7.5 mm with force effect of 25 N on a belt.
Perform cogged belt tension to prescribed value after
releasing tightening screws of air-condition compressor.

Bleeding of tractor brake system

Carry out bleeding of the brake system of the tractor
always in the following order:
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.
When bleeding the pressure air system for
trailers and the rear wheel brakes, one pedal (1) must
be always depressed by 7,5
main brake valve piston rod i.e. 3
adjusting screw (2) and the second pedal is used for
bleeding. For keeping the right distance, insert the flat
gauge of corresponding thickness, i.e. 3
between the pedal (1) and the adjusting screw (2).

ADJUSTMENT

+0,5
mm -measured to the
+0,2
mm at the
+0,2
mm,
185
FH12N085
G735a
E757