Section B. Specifications
Belarus-510/512 Operating manual
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Fig. 2. Gearbox of BELARUS-510/512 tractor (9F/2R)
1 — forks housing; 2 — housing; 3 — adjustment shims; 4 — engine start lock sensor; 5
— axle of frame; 6 — ball bearing; 7 — frame; 8 — spring; 9 — bolt; 10 — lever; 11 —
ball; 12 — lock strips; 13 — fork of 4th and 5th gears; 14 — range reducer rod; 15 — cov-
er; 16 — check plug; 17 — drain plug; 18 — cover; 19 — oil dipstick; 20 — fork of 1st gear
and reverse gears; 21 — fork of 3rd and 6th gears; 22 — GB cover; 23 — driven pinion of
hill-climbing gears and reverse gears; 24 — pinion of hill-climbing gears and reverse
gears; 25 — shaft of 1th gear and reverse; 26 — FDA drive pinion axle; 27 — reverse in-
termediate gear; 28 — FDA drive pinion axle; 29 — FDA drive pinion
Gearbox
The gearbox (GB) is an element of the tractor transmission serving to change the
transmission gear ratios and reverse the tractor movement, thus achieving the required
speed range of the tractor (see Table 1), as well as for long-term disengagement of the
engine and the tractor propeller.
Besides, the GB design provides driving the front drive axle (FDA) of the tractor
and synchronous rear power take-off shaft (PTO).
The BELARUS-50/52 tractors and their modifications have a mechanical fixed-ratio
dual-range 9F/2R GB with a central position of the GB control lever, the design and opera-
tion of which are described below.
