Belarus 1822.3, Руководство оператора

Страница: 87 / 358

2022.3-0000010 OM
86
The speed group consists of the primary shaft 48 (figure 3.3.2), on which the driving
gears 56, 59, 66, 71 of the fifth, the sixth, the third and the fourth speed respectively are
mounted on the needle bearings 55, 61, 64, 70. The toothed rim of the shaft 48 is the first
speed, and the gear 62 is the second speed. Single-cone synchronizers that are controlled
through forks, carriers and levers from the tractor cab are mounted on splines of the shaft
48. The synchronizer 58 provides for engagement of the fifth and the sixth speeds, the
synchronizer 37 on the shaft 42 provides for engagement of the first and the second
speeds. The primary shaft is mounted in the block of the roller bearing 74 in the gearbox
case on the one side and the ball bearing 52 in the cage 53 on the other side. The axial
movement of the parts on the shaft is prevented by mounting splined nuts 49, 75 on both
sides of the shaft with their further locking. In the inner bore of the primary shaft 48 the
throttle 2 is mounted, which also intrudes into the bore in the secondary shaft 12 and
serves to supply lubricant over the bores from one shaft to the other.
The driven gears 41, 39, 34, 33 are mounted on the intermediate shaft 42, the gears
38, 35 of the first and the second speeds are mounted on the needle bearings 36. The
shaft is located in the block of the ball bearing 46 on the one side and the spherical bear-
ing 32 on the other side. On the toothed rim of the intermediate shaft 42 the clutch 28 is
mounted, which provides for range “B” engagement through the fork, the carrier and the
lever in the tractor cab (figure 3.3.7). Inside the intermediate shaft 42 (figure 3.3.2) there is
a PTO drive shaft 44, which is linked to splines of the shaft in the coupling clutch with its
one splined end, and on the other side – with the parts of the PTO reduction unit.
On the needle bearings 13 of the secondary shaft 12 the welded gears 6, 8 are
mounted as well as the double-cone synchronizer 14, which provides for engagement of
the higher/lower pass of the gearbox reduction unit “H-L”. Also the driving gear of the FDA
drive is mounted on the shaft splines. The whole set of the shaft parts is tightened with the
nut 31. The secondary shaft 12 is mounted in the bore of the cone bearings 10, 29 that are
adjusted with adjusting washers, and the offset of the tapered toothed head of the shaft
(19,4
-0,13
) mm is assured by matching the adjusting washers 11.
On the splines of the shaft 16 in the gear train the gears 23, 25, the distance bush-
ing 24 are mounted, and the FDA drive gear 22 is mounted on the needle bearings 21.
On the shaft of low speeds and reverse travel 78 the gears 83, 101 of the first and
the second range of the forward and reverse travel are mounted, on the bushing 103 the
clutch 84 is located which is shifted through the system of carrier – fork – lever from the
tractor cab. On the bushing 100 the gear 88 is mounted, which engages the creeper drive
gear 98, which in its turn is connected with the toothed rim of the intermediate shaft 42.
The gear 88 on the bushing 100 is prevented form axial movement by mounting the lock
ring 87. The shaft 78 is mounted in the block of the roller bearings 81, 86, and is secured
by mounting the lock ring 80 in the gearbox case.
In the case 54 the shaft 117 with the half-clutch 118, the bushing 119 and the FDA
friction coupling 110 is mounted.
In the case 54 on the carriers the fork 30 switching the toothed clutch 28, the fork
111 switching the toothed clutch 84 and the fork 3 switching the synchronizer 14 are
mounted. The carriers are secured in the case by means of ball locks. In the fork housing
65 three carriers, the fork 67, the ball lock and parts of the mechanism that locks simulta-
neous engagement of two speeds (a ball, a pin) are mounted. The fork housing 65 is fas-
tened on the gearbox case 54.
The shifting forks are mounted on the carriers 123, 126 and are fixed with adjusting
bolts and further locked with wire.
https://tractormanualz.com/