Check And Adjustment Of Preload In Conical Bearing Of Reduction Unit Drive Gear - Belarus 3522.5 Operator's Manual

Both rows of rollers are divided by washer 11. As one roller race serve grinding sur-
face of axis 8, and as another –inner grinding surface of planetary gear 6. The planetary
gears and roller are locked from axial movement with washers 7. The planetary gear axles
are fixed from axial movement in carrier seat with pins 13.
The carrier is attached to casing 34 by bolts 2 with spring washers 12. The carrier is
centered by collar that fall into housing bore. On carrier flange is situated aperture for
conic plug 1, that matches with aperture in casing flange and serves for filling of wheel hub
drive with oil and for its drain. Between carrier 3 and casing 34 is located sealing gasket
36.
The reduction unit casing 34 is centered and attached by pins 16 to a hub 18 rotat-
ing on two conical roller bearings 29, as a support for bearings serve rotary axle swivel 23.
Between casing and hub is fastened sealing gasket with nuts 20 and spring washers 19.
Thus, on bearings 29 rotates follower unit consisting from carrier with planetary gear, of
casing and hub. To the face of axle swivel 23 with bushings 21 and bolts 32 is attached disk
14, which splined part grips crown epycyclic gear and thanks to this prevent its turning.
Between axle swivel face 23 and disk face 14 are situated gaskets 31, serving for
bearing 29 adjustment. The spring ring 15 keeps epycyclic gear from axial moving, this
spring ring is insert in gear 35 ring groove.
The wheel hub drive inner cavity is sealed with cup seals 24 and 28. To prevent dirt
entry to working fringes of cup seals is mounted mud collector 22 and additionally sealing
25.Carrier 3 bore is sealed with rubber rings 9, and to prevent oil leakage along splines of
sun gear 4 in fork of doubled universal joint 41 (figure 3.12.11) is mounted blind plug and
gasket.
3.12.4 Check and Adjustment of Preload in Reduction Unit Drive Gear Conical
Bearing
The axial preload in drive gear conical bearings should be between 0,01and 0,04
mm.
Before preload adjustment it is necessary to make installation of gear 1 (figure
3.12.4) and hold to the dimension "A", that is ensured by means of choosing of one of the
washers 2. Ensure the necessary bearing preload by washer 3 choosing.
It is necessary to control axial preload by turning of gear 1 without sealing installation.
The starting torque should be 0,4 ...1,6Nm. The gear should run without jammings.
Figure 3.12.4 – Drive gear in central reduction unit casing
1 – drive gear; 2 – washer; 3 – washer.
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