Zetor Proxima GP 80, Operator'S Manual

Page: 153 / 176

Adjustment of free travel of brake pedals
Adjustment of free travel of clutch pedal
Bleeding of hydraulic clutch circuit
Correct play between the piston rod of brake pedal and
the piston of main brake valve is 0.5 - 1.0 mm (3 - 6 mm
when measured at the edge of the brake pedals at
unlatched pedals). Adjust the play at unlatched pedals and
after releasing of the adjusting nut (1), in which the piston
rod is screwed.
C754
Correct play between pedal piston rod and main cylinder
piston is not adjusted -play is adjusted by the producer.
Mutual position between the piston rod and piston rod eye
(1) is adjusted so that the piston rod might be maximally
pulled out from the cylinder and simultaneously the play
between the pedal and the upper stop screw (2) might be
0,1 - 0,2 mm. Subsequently the piston rod is fixed with the
nut (3) to piston rod eye. Check eventual deformation of
dust cap after adjustment, in case of deformation correct it
by hand.
C765
Bleed the clutch hydraulic circuit in the same way as rear
brake system bleeding. The vent screw of clutch hydraulic
circuit is located at the clutch control cylinder (1).
Add only fresh brake fluid into the brake fluid
tank, which is common for both brake and clutch
circuits.
Brake fluid must be replaced in the entire brake circuit
including the clutch hydraulic circuit after each two
years of operation.
C767
ADJUSTMENTS
152