Maintenance Service In Every 125 Hours Of Operation (Ms-1) - Belarus 2022.6 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.
5.4.2.2 Operation 21. 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
customer 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 5.4.15) of rear wheel conic hubs shall be from
550 to 600 Nm;
- tightening torque of nuts 3 for rear wheels mounting on hubs shall be from 700 to
750 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 5.4.15 – Check of threaded joint tightening of wheel mounting
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2022.6-0000010 OM