3522.5-0000010 РЭ
148
3.12 Front Driving Axle (FDA)
3.12.1 General information
1 –wheel hub drive; 2 –shim washer; 3 –spring washer; 4 – bolt; 5 – cap; 6 –oiler; 7 –
ring; 8 – fixture; 9 – bearing; 10 – spacer; 11 – bearing; 12 – semiaxle shaft; 13 – FDA hous-
ing; 14 – ventilation valve; 15 – central reduction unit; 16 – plug;17 – oiler; 18 – clip; 19, 20 –
bushing; 21 – bolt; 22 – spring washer; 23 – clip; 24 – bushing, 25 – lock pin; 26 – ring; 27 –
plug; 28 –washer; 29 – bushing; 30 – locking ring; 31 – blind plug; 32 – gasket; 33 – sealing;
34, 41 – hinged fork; 35 – doubled fork; 36 – bearing; 37 – axle; 38 – ring; 39 – body; 40 –
spider and bearing assembly; 42 – locking nut; 43 – screw; 44 – adjusting bolt; 45 – locking
nut.
Figure 3.12.1 – Front driving axle
The front driving axle (FDA) is intended for torque transfer to front tractor wheels.
The front driving axle consists of one-piece cast axle beam (of FDA housing) (figure
3.12.1), central reduction unit 15, doubled universal joints, semiaxle shafts 12 and plane-
tary wheel hub drives 1. The central reduction unit 15 is mounted on FDA housing 13 with
a help of two lock pins 25 and is fixed to housing by bolts 21. To seal joint between hous-
ing and central reduction unit is used rubber ring 26. The drive torque from central reduc-
tion unit to the wheel hub drives is transferred by semiaxle shafts 12 and by doubled uni-
versal joints. The doubled universal joint consists of forks 34 and 41; connected by fork 35,
by two spiders 40 with nail bearings. The joint is mounted on front axle housing on two ball
bearings 9 and 11 between which is mounted bearing spacer 10.
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