Komatsu D375A-8, Operation & Maintenance Manual

Page: 335 / 466

METHOD FOR CHECKING LOOSENESS AND TIGHTENING TRACK SHOE
BOLTS
If shoe bolts (1) are used while they are loose, they are broken.
Tighten them immediately whenever you find they are loose.
METHOD FOR RETIGHTENING SHOE BOLT
1.
Tighten the shoe bolts in the order shown in the figure.
Tightening torque for shoe bolt: 1235 to 1509 Nm {126 to
154 kgm}
2.
Check that the nut and shoe are in close contact with the
link contact surface.
3.
After checking, retighten by 110 to 130 °.
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: 617 to
755 Nm {63 to 77 kgm}
2.
Check that the link contact surfaces are fitted.
3.
After checking, retighten by 170 to 190 °.
METHOD FOR INVERTING AND REPLACING CUTTING EDGE AND END BIT
k k
WARNING
It is dangerous if the work equipment moves by mistake when the cutting edge or end bit is being inver-
ted or replaced.
Set the work equipment in a stable condition, set the work equipment lock lever to LOCK position, and
stop the engine.
Invert or replace the cutting edge and end bit before they are worn to the blade end.
1.
Raise the blade to proper height, and place blocks under it to prevent it from lowering.
2.
Set the work equipment lock lever to LOCK position.
3.
Stop the engine.
4.
Judge the wear of the end bit and cutting edge by the following wear standards.
MAINTENANCE MAINTENANCE PROCEDURE
4-25