Maintenance Service In Every 125 Hours Of Operation (Ms-1) - Belarus 1523.5 Operator's Manual

5.4.2 Maintenance service in every 125 hours of operation (MS-1)

5.4.2.1 General instructions
Perform previous operations, and the operations specified in the present subsection
5.4.2.2 Operation 18. Check of threaded joint tightening of wheel fixing
The operation on check of threaded joint tightening of wheel fixing shall be carried out
once during the first MS on a shift basis (in 8-10 hours of operation) carried out by a cus-
tomer and then every 125 hours of operation.
Check the tightening of wheel and hub bolt retaining nuts and if necessary, tighten them
up:
- tightening torque for bolts 4 (figure 5.4.10) of rear wheel conic hubs shall be from 360 to
450 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 2 for front wheel disks mounting on rim brackets shall be from
180 to 240 Nm.
1 – nuts for front wheels mounting on reducing gear flanges of FDA; 2 – nuts for
front wheel disks mounting on rim brackets; 3 – nuts for rear wheels mounting on hubs; 4 –
bolt for fastening rear wheel taper hubs.
Figure 5.4.10 – Check of threaded joint tightening of wheel mounting
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1523.5-0000010 OM