Komatsu PC290LC-6K Operation & Maintenance Manual page 182

24. SERVICE PROCEDURE
24.2.3 CHECK AND TIGHTEN TRACK SHOE BOLTS
If the machine is used with track shoe bolts
so tighten any loose bolts immediately.
Method for tightening
1. Tighten first to a tightening torque of 390 ± 40 Nm (40 ± 4 kgm, 290
± 30Ib ft) , then check that the nut and shoe are in close contact with
the link mating surface.
2. After checking, tighten a further 120
Order for tightening
Tighten the bolts in the order shown in the diagram. After tightening,
check that the nut and shoe are in close contact with the link mating sur-
face.
3-36
loose, they will break,
o ± 10 o .