Range Shifting Reduction Unit - Belarus 3522.5 Operator's Manual

Driving disks 13 are mounted in drum grooves, and in between there are metal-
ceramic driven disks 12 with inner splines. The disk packs are completed with bearing
disks 11, fixed by lock rings 2.
Arrangement of the friction clutch 25 is identical with the arrangement of the friction
clutch 21.
1, 7 – sealing ring; 2, 6 – lock ring; 3 – centrifugal ball piston; 4 – piston; 5 – guide pin; 8 –
spring; 9 – drum; 10 – spring bolster; 11 – bearing disk; 12 – driven disk; 13 – driving disk.

3.4.3 Range shifting reduction unit

Range shifting reduction unit is a body 7 (figure 3.4.3) where the following shafts
are mounted:
- input shaft 12;
- layshaft 19;
- reverse shaft 6 (figure 3.4.4);
- creeper shaft 24 (figure 3.4.3);
- PTO drive shaft 11;
- FDA drive shaft 30.
The input shaft 12 is mounted in the body 7 on bearings 4 and 14. It is made with
two toothed rims A and B. The toothed rim A provides for forward motion, the toothed rim
B provides for reverse of the tractor. A gearwheel unit 9 is mounted on the input shaft on
roller bearings 8 and 10.
A layshaft 19 is mounted in the body 7 on bearings 2 and 18. Toothed clutches 28
and 32, gearwheel unit 29, gears 3, 17, 20, 27 and 31 are mounted on the shaft. The
gears 3, 17, 27, 31 as well as the gearwheel unit 29 are mounted on needle bearings. The
gear 20 is mounted on the splines.
Any range is engaged by moving the toothed clutch either forward along tractor
movement or backwards, providing splined connection of the toothed clutch with the corre-
sponding gears.
Figure 3.4.2 – Friction clutch
108
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