Check And Tighten Track Shoe Bolts - Komatsu D155A-6 Operation & Maintenance Manual

SERVICE PROCEDURE
WHEN REMOVING TRACK
The situation can be extremely dangerous when removing the track.
When following the adjustment procedure above in "WHEN LOOSENING TENSION (PAGE 4-29)", if the track does not become
loose, contact your Komatsu distributor for repairs.

CHECK AND TIGHTEN TRACK SHOE BOLTS

Track shoes may be broken, if they are used with loosened shoe
bolts (1). Hence whenever a loosened bolt is found, be sure to
retighten it.
METHOD OF TIGHTENING SHOE BOLT
1. First, tighten to a tightening torque of 590 ± 60 Nm (60 ± 6 kgm , 434.0 ± 43.4 lbft), then check that the nut and
shoe are in tight contact with the link mounting face.
2. After checking, tighten a further. 120° ± 10°.
METHOD OF TIGHTENING MASTER LINK CONNECTING BOLT
1. First, tighten to a tightening torque of 590 ± 60 Nm (60 ± 6 kgm , 434.0 ± 43.4 lbft), then check that the link
mounting face is in tight contact.
2. After checking, tighten a further 180° ± 10°.
ORDER FOR TIGHTENING
Tighten the bolts in the order shown in the diagram on the right.
4 - 30
WARNING
MAINTENANCE