Operation 48. Check / Adjustment Of Service Brake Control - Belarus 2022.6 Operator's Manual

5.4.3.4 Operation 48. 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 UNDER
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 – counter nut; 8, 9
– pedal; 10 – pipeline connecting two main brake cylinders.
Figure 5.4.26 – Adjustment of pedal free travel and position of pedals for 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 5.4.26) in the same plane by means of adjust-
able 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 8 mm. 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 rods;
- unscrew counter nuts 7 by 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, mount pins 6 and splint them. Free travel of pedals within 4 to 8 mm cor-
responds to the clearance from 0.6 to 1.3 mm between the pusher and the piston of each main
brake cylinder;
- the pedals shall not contact with the cab elements. The arrangement of pedal cradles
according to the height shall be adjusted by means of bolts 5 and the length of main brake cyl-
inder rods if necessary, ensuring the pedal free travel from 4 to 8 mm.
3. Check the length of operating brake cylinder 8 (figure 5.4.27) of the left brake. The
operating brake cylinder length shall be within 205-213 mm, measured from the cylinder at-
taching point to the axis of pin 4 which connects lever 5 with yoke 3, with the operating brake
cylinder rod pushed inside to the extreme position, as shown in figure 5.4.27. At this, pin 4
travel shall be within 10-12 mm when applying force from 350 to 400 N to lever 5 at the arm 60
mm. In case this condition is not observed, carry out adjustment.
Adjustment shall be carried by means of performing the following operations:
disconnect rod 7 of the parking brake drive from lever 5, for which it is required
-
to unlock and remove the pin attaching rod 7 to the lever;
unscrew counter nut 2 on the cylinder shaft for several revolutions;
-
rotating shaft 1 of the operating brake cylinder by flattened surface, adjust the
-
cylinder length and travel of the operating cylinder yoke pin within the required limits;
lock counter nut 2, connect rod 7 of the parking brake drive to lever 5, lock the
-
pin.
mm
169
2022.6-0000010 OM
mm
mm