177
ADJUSTMENT
G735a C756
BLEEDING OF TRACTOR BRAKE
SYSTEM
Bleeding of the tractor brake system
always do in the following order:
1. pressure air brake system for trailers
2. rear wheel service brakes
3. hydraulic brakes of trailer
Bleed the pressure air system for trailers
and the rear wheel service brakes at
unlatched brake pedals, separately for
each wheel.
Bleed the hydraulic brakes of trailer at
latched brake pedals.
During bleeding observe brake fluid level
in the equalizing tank to avoid suction of
air into the system.
After each two years it is necessary to
replace brake fluid in the entire brake
circuit.
Important:
When bleeding the pressure air
system for trailers and the rear
wheel brakes, one pedal (1) must
be always depressed by 7,5
+0,5
mm -
measured to the main brake valve piston
rod i.e. 3
+0,2
mm at the 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
+0,2
mm, between the
pedal (1) and the adjusting screw (2).
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