Check And Adjustment Of Backlash (Preload) In Conical Bearings Of Hub; Check And Adjustment Of Axial Preload In Conical Bearings Of The Pivot - Belarus 3522.5 Operator's Manual

3.12.7 Check and Adjustment of Backlash (Preload) in Hub Conical Bearings
The axial backlash or preload in hub bearing should not exceed 0,05 mm.
Please adjust with a help of shim washers 2 (figure 3.12.6). At bolts 3 tightening
turn over hub 1, so that bearing rollers have taken correct position in race.
It is necessary to control axial backlash at moving of hub 1 in axial direction with
force between 500 and 600N. The moment of hub rotating resistance should not exceed
60 Nm at tension.
Figure 3.12.6 – Hub with swivel of wheel hub drive

3.12.8 Check and adjustment of axial preload in conical bearings of the pivot

Before adjustment it is necessary to do the following preparatory works:
- clear out FDA;
- put tractor on level ground, brake it and exclude possible moving;
- jack front part of tractor and put supports under FDA according to jacking points
shown on the tractor;
- loose wheel retaining nut and remove wheels, observing safety measures;
- disconnect steering rod from left and right wheel hub drives and remove it from
FDA;
- disconnect hydraulic cylinder mounting pins from eyes of wheel reduction gears;
- with a help of dynamometer with a scale factor of 300N define force of wheel hub
drive turning in one direction and than in other direction. .
1 – hub; 2 – shim washer; 3 – bolt.
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