Maintenance Service In Every 125 Hours Of Operation (Ms-1) - Belarus 922.6 Operator's Manual

5.4.2 Maintenance services in every 125 hours of operation (MS-1)
5.4.2.1 General guidelines
Perform the following operations and the operations, listed in this subsection 5.4.2.
5.4.2.2 Operation 20. Check of threaded joint torqueing of wheels mounting
Check threaded joint torqueing of wheels mounting shall be carried out one time
along with first MS on a shift basis (in 8-10 hours of operation), which is carried out by a
customer and then in every 125 hours of operation.
Check the torqueing of torqueing wheel nuts and hub bolts, and, if necessary, tighten
them up:
- tightening torque for bolts 2 (Figure 5.4.13) of the rear wheel terminal hubs shall
make 300 to 400 Nm (four bolts for each hub). If taper hubs are mounted, then the tighten-
ing torque for bolts 2 of the taper hubs shall be 360 to 400 Nm;
- tightening torque of nuts 3 for rear wheels mounting on hubs shall be from 300 to
350 Nm;
- tightening torque of nuts 1 for front wheels mounting on reducing gear flanges of
FDA shall be from 200 to 250 Nm;
- tightening torque of nuts 5 for front wheels disks mounting on the rim brackets shall
be from 180 to 240 Nm.
1 – nuts for front wheels mounting on reducing gear flanges of FDA; 2 – bolt for fas-
tening rear wheel terminal hubs; 3 – nuts for rear wheels mounting on hubs; 4 – bolt for fas-
tening rear wheel taper hubs; 5 – nuts for front wheels disks mounting on the rim brackets.
Figure 5.4.13– Check of threaded joint torqueing of wheels mounting
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922.6-0000010 OM