Operation 44. Check / Adjustment Of Service Brake Control - Belarus 1523.5 Operator's Manual

1523.5-0000010 OM

5.4.3.4 Operation 44. Check / adjustment of service brake control

ATTENTION: IT IS REQUIRED TO CHECK AND ADJUST THE BRAKE SYSTEM AS
WELL AS ELIMINATE ANY FAILURES IN IT ONLY WITH THE ENGINE OFF AND THE
TRACTOR BEING FIXED IN THE HORIZONTAL POSITION BY MEANS OF STOPS UN-
DER THE WHEELS WHICH EXCLUDE THE TRACTOR SPONTANEOUS MOVEMENT!
ONLY DEALERS ARE ALLOWED TO MAKE ADJUSTMENTS OF THE BRAKE SYSTEM
AND ELIMINATE ANY FAILURES!
1, 2 – main brake cylinder; 3 – yoke; 4 – nut; 5 – adjustable stop bolt; 6 – pin; 7 – counternut; 8, 9 –
pedal; 10 – pipeline connecting two main brake cylinders.
Figure 5.4.21 – Adjustment of pedal free travel of service brake control
Adjustment of the tractor service brake control shall be performed in the following order:
1. Set cradles of pedals 8 and 9 (figure 5.4.21) in the same plane by means of adjustable stop
bolts 5 by screwing them to the depth of (203) mm. Lock nuts 4.
2. Check the pedals free travel. Free travel of pedals 8, 9 shall be within 4 to 8mm. If this condition
is not observed, adjust the pedals free travel doing the following operations:
- unsplint and remove pins 6 and disconnect yokes 3 from pedals 8 and 9 cores;
- unscrew counternuts 7 for several resolutions, then by screwing or unscrewing yokes 3 shorten or
lengthen the rods of main brake cylinders 1 and 2 to get the required pedal free movement;
- lock nuts 7, set pins 6 and splint them. Free travel of pedals within 4 to 8mm corresponds to the
clearance between the pusher and the piston of each main brake cylinder from 0,6 to 1,3mm;
- the pedals shall not contact with the cab elements. The arrangement of pedal cradles along the
height shall be adjusted by means of bolts 5 and the length of main brake cylinders rods if neces-
sary, ensuring the pedal free travel from 4 to 8mm.
3. Check the length of operating brake cylinders 1 and 14 (figure 5.4.22). The operating cylinders
length shall be (2072) mm while measuring from the cylinder fixing point to the pin axis which
connects levers 5 and 9 with yokes 3 and 12 correspondingly, with the operating brake cylinder rod
pushed inside into the extreme position, as shown in figure 5.4.22. In case this condition is not ob-
served, set the length for operating brake cylinders 1 and 14 into the size (2072) mm.
Setting of length for operating brake cylinders shall be performed by means of yokes 3 and 12,
bolts-links 6 and 10, doing the following operations:
unscrew counternuts 2 and 13 for several resolutions;
unsplint and remove pins 4 and 11 after disconnecting yokes 3 and 12 from levers 5 and 9 of the
right and left operating cylinders correspondingly;
by screwing and unscrewing yokes 3 and 12 from the rods of operating brake cylinders 1 and 14,
set the size (207 2) mm;
lock counternuts 2 and 13, set and splint pins 4 and 11.
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