Section B. Technical data
Belarus – 90/92 Operating manual
20
Picture.
а
,
б
Gear box:
1 — screw of countershaft; 2 - countershaft; 3 — main
drive shaft; 4 — driven gear of back gear; 5 — gear
box casing; 6 — cup of main drive shaft; 7 — sliding
gear wheel of 4-5-th gears; 8 — sliding gear wheel of
3-th gear; 9 — crutch flute; 10 — main shaft; 11 —
ball; 12 — deck of gear box; 13 — filler plug; 14 —
trunnion ball; 15 — gear-change lever; 16 — rubber
boot; 17 — pin; 18 — frame; 19 — roller of frame; 20
— ball switch; 21 — switch
ВК
12 - 51; 22, 23 —
adjusting shims; 24 — screw of main shaft; 25 — axle
drive gear; 26 — driven gear of II gearing pass; 27,
28 — conical rolling bearing; 29 — impeller; 30 —
cluster of internal shafting; 31 — bronze plug; 32 —
shafting; 33 — roller bearing; 34 — bronze plug; 35 —
axle drive gear of II gearing pass; 36 — axle drive
gear of I gearing pass; 37 — idler gear.; 38 — roller
bearing; 39 — driven gear of 3 gearing pass; 40 —
driven gear of 4 gearing pass; 41 — idler gear of
reverse; 42 — axis of idler gear; 43 — driven gear of
5 gearing and reverse pass; 44 — bearing; 45 — front
cluster of internal shafting; 46 — idler gear of back
gear; 47 — switching roller of reduction gear; 48 —
lever; 49 – idler gear; 50 — plug; 51 — thrust ring; 52
— cover gasket; 53 — left cover of side door; 54 —
spring ring; 55 — driven gear of speed reducer
switcher; 56 — driven gear of 5 gearing and reverse
pass; 57 — sliding gear of 1 gearing and reverse
pass; 58 — shafting of 1 gearing and reverse pass;
а
— trust collar.
Back gear
Back gear of tractor is destined for additional
speed line required for work with agricultural
machinery.
Back gear is disposed between clutch and
gear box. On the force shafting of clutch is
splint mounted movable coupling gear clutch.
When the gear clutch engages by means of
shift mechanism with drive reduction gear,
placed on force shafting, it means, that the
back gear is switched on. When the gear
clutch engages with driven gear 4 (pic. a),
mounted on
splines of main draft shaft of gear
box, it means, that back gear is switched off.
Both gears are in constant mesh with idler
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