Minsk Tractor Works Belarus 1221.2, Disassembly-Assembly Manual

Page: 181 / 302

Disassembly-assembly manual for tractor BELARUS-1221.2/1221 В .2/1221.3/1221.4
180
e) mount differential 5 with conical roller bearing ами 6 inside body 3 of FDA, (Figure 5.35).
f) put set pf spacers 2 with total thickness 2.0…2.5 mm on the right side between FDA body 3 and
sleeve 9.
g) check and, if necessary, adjust dimension 40.7±0.15 mm from final drive axle to surface “ А ” of
differential.
To adjust dimension change the stack of spacers 2 on the right side. After adjusting the dimension
pull differential out of body 3 and put on it gear 4, torque nut 8 to 125…155 N m. To lock nut 8, put
its tendril in the differential box groove.
h) put differential inside body 3 and adjust pretension in bearings 6, which should not exceed 0.10
mm.
To adjust tension change stack of spacers 2 on the left side.
When tightening bolts for fastening sleeves 1, 9 to body of FDA 3 turn through differential body 5
so that rollers of bearings occupied correct position in shells of bearings.
When adjustment was made correctly moment fifferential turning should be in the range from 0.6
to 60 N m.
1,9 – cover (sleeve); 2 – adjusting shims; 3 – body of FDA; 4 – driven gear; 5 – differential as an
assembly; 6 – conical roller bearing; 7 –driving gear of final drive; 8 – nut
Figure 5.35
i) install gear box of final drive 2 inside body 6 of FDA, (Figure 5.36).
j) put required stack of spacers 3 to adjust lateral clearance in the engaged gears of final
drive 4, 5.
Clearance should be within 0.18 – 0.46 mm, which corresponds to angular movement of flange 1
(for diameter of bolts position), correspondingly 0.3 – 0.65 mm.
When measuring lateral clearance, lock driven gear 5 against rotation using rod or another tool
and opening for filler plug 7 in body 6 of FDA.