Method For Checking Looseness And Tightening Track Shoe Bolts - Komatsu D61EX-24 Operation & Maintenance Manual

MAINTENANCE PROCEDURE
METHOD FOR CHECKING LOOSENESS AND TIGHTENING TRACK SHOE
BOLTS
NOTICE
If the machine is used with track shoe bolts loose, they will break. Tighten any loose bolt immediately.
1.
Check for looseness of track shoe bolt (1).
2.
If any bolt is loose, retighten it.
METHOD FOR TIGHTENING TRACK SHOE BOLTS
1.
Tighten the track shoe bolts in the order shown in the fig-
ure.
Tightening torque of shoe bolt: 490 ± 49 Nm {50 ± 5 kgm,
362 ± 36.2 lbft}
2.
Check that the nut and track shoe are in close contact with
the link contact surface.
3.
After checking, retighten by 120 ± 10 °.
METHOD FOR RETIGHTENING MASTER LINK CONNECTING BOLT
1.
Tighten the master link connecting bolts in the order shown
in the figure.
Tightening torque for master link connecting bolt: 343 ±
39 Nm {35 ± 4 kgm, 253 ± 29 lbft}
2.
Check that the link contact surfaces are fitted.
3.
After checking, tighten by 180 ° (Allowable range: 0 ° to
20 °).
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MAINTENANCE