Minsk Tractor Works Belarus 1221.2, Руководство по разборке и сборке

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Disassembly-assembly manual for tractor BELARUS-1221.2/1221 В .2/1221.3/1221.4
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4.6.11 Assembly of left-side foot brake and differential interlock clutch
а ) make assembly and installation of the left-side brake in a way similar to assembly and
installation of the right-side foot brake;
b) align, using shaft 1 of final drive driving gear, disks 3, interlock clutches and secure them with
two diametrally located riveted rods 4 (screwdriver type);
с ) pull shaft 1 out of splined section of clutch friction disks;
d) grease with consistent lubricant mounting faces “ А ” of interlock shaft 2 and rings 8 inside
opening of shaft 1 of the final drive gear;
e) install assembled friction clutch in a way to align splines of shaft 2 and differential crossbar 7,
as well as splines of friction disks 3 and shaft 1 of final drive gear In case of splines’ misalignment
repeat operations 2…5;
f) mount housing 9 and secure it with bolts 5.
1 – drive gear shaft; 2 – interlock shaft; 3 – clutch disks; 4 – rod; 5 – bolt; 6 – housing; 7 –
differential crossbar; 8 – sealing ring; 9 – clutch housing
Figure 4.135
4.6.12 Assembly of parking brake
а ) make subassembly of the parking brake similarly to assembly of two-disk foot brakes.
Attention! Size of brake disks (1), (3), pressure disks (2) parking brake disks and housing 9 is
smaller than that of foot brakes. Outside diameter of brake disks 1 parking brake – 180 mm, of main
brakes 4 – 204 mm (Figure 4.136).
Thickness of parking brake disk – 12.2 mm, foot brakes’ disk – 10.5 mm.