Operation 49. Check / Adjustment Of Parking Brake Control - Belarus 2022.6 Operator's Manual

5. Check the value of the unlocked pedals full travel separately, applying force of
(300±30) N which shall be within 100 to 120mm. The difference between the full travel of the
right and left pedals shall not exceed 10 mm.
In case the value of one of the pedals full travel exceeds the specified limits, it is re-
quired to make adjustments of the corresponding pedal full travel, doing the following opera-
tions:
unscrew counter nut 2 (figure 5.4.27) on shaft 1 of operating brake cylinder 8 for
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several revolutions;
rotating shaft 1 of the operating brake cylinder by flattened surface, adjust the
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cylinder length and travel of the operating cylinder yoke pin 4 within the required limits;
lock counter nut 2.
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If the value of both pedals full travel exceeds the required limits, it is necessary to carry
out adjustment of both pedals full travel.
6. Check the efficiency of service brakes operability during tractor movement along dry
road with hard surface with the clutch off. When the interlocked brake pedals are depressed
with the force of 590 to 600 N, the length of braking path shall not exceed 6.4 m with the trac-
tor travel speed of 20 km/h. Unevenness of tractor movement in the process of braking shall
not exceed 0.5 m. If necessary, adjust the simultaneity of braking start by means of changing
the length of one of operating brake cylinders, as specified above.

5.4.3.5 Operation 49. Check / adjustment of parking brake control

ATTENTION: CHECKS AND ADJUSTMENTS OF THE PARKING BRAKE AS WELL
AS TROUBLESHOOTING SHALL BE PERFORMED WITH THE ENGINE OFF AND THE
TRACTOR BEING FIXED IN HORIZONTAL POSITION WITH STOPS UNDER THE WHEELS
WHICH EXCLUDE SPONTANEOUS TRACTOR MOVEMENT! ONLY DEALERS ARE AL-
LOWED TO PERFORM ADJUSTMENTS AS WELL AS TROUBLESHOOTING OF THE
PARKING BRAKE!
Check of the efficiency of parking brake operability consists in tractor being able to hold
itself at a slope at least 18% when applying the force of not more than 400 N to the parking
brake control lever. In case this requirement is not observed, it is necessary to carry out ad-
justment of parking brake control.
ATTENTION: ADJUSTMENT OF PARKING BRAKE CONTROL SHALL BE CARRIED
OUT AFTER PERFORMING THE OPERATION ON ADJUSTMENT OF SERVICE BRAKES
CONTROL!
Adjustment of parking brake control shall be carried out in the following order:
shift handle 9 (figure 5.4.30) with rod 3 to the extreme lower position;
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adjust the length of the left brake rod 16 and the length of the right brake rod 13
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so that the clearance between pin 21 and yoke 22 of the left brake is within 3 to 4 mm, and pin
23 touches the oval groove butt end of the right brake yoke 24 when mounting handle 9 of the
brake to the extreme lower position;
to adjust the length of rod 13, it is required to unlock pin 23 and loosen tighten-
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ing of yoke 24 counter nut. Changing of rod 13 length of is carried out by rotating yoke 24;
to adjust the length of rod 16, it is required to unlock pin 21 and loosen tighten-
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ing of yoke 22 counter nut. Changing of rod 16 length is carried out by rotating yoke 22;
all pins shall rotate easily in junctions "yoke-lever head" and move along yokes
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grooves without jamming;
after adjustment, lock pins 21 and 23 and also tighten counter nuts of yokes 22
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and 24 for rods 16 and 13 with the torque from 40 to 45 N•m.
Final check and adjustment of the parking brake shall be carried out on the assembled
tractor. The tractor shall be able to hold itself at a slope at least 18% when applying the force
of not more than 400 N to the control handle. In case of necessity, make an adjustment by
changing the length of rods 13 and 16.
ATTENTION: WHEN ADJUSTING THE LENGTH OF RODS 13 AND 16, AVOID DECREASING
THE LENGTH OF THE ROD SCREW-IN PART INTO THE YOKE LESS THAN 12 MM.
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2022.6-0000010 OM