Komatsu PC490-11, Installation And Instruction Manual

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5.
Check each pulley for damage, wear of the V-groove, and the wear of the V-belt. In particular, be sure to
check that the V-belt is not touching the bottom of the V-groove.
6.
Replace the belt with a new one if the belt is stretched and has no allowance for adjustment, or has slipping
sound or squeak because of cuts or cracks of the belt.
NOTICE
When the new V-belt is installed, readjust it after operating for 1 hour.
METHOD FOR CHECKING LOOSENESS AND TIGHTENING CONNECTING BOLT
BETWEEN CENTRE FRAME AND TRACK FRAME
NOTICE
If the machine is used with loose bolts connecting the centre frame and track frame, the bolts will break.
If any looseness of connecting bolt is found, retighten it.
1.
Check for looseness of the bolts (1) connecting the centre
frame and track frame.
2.
If any looseness of the bolt is found, tighten it.
Tightening torque: 1715 ± 195 Nm {175 ± 20 kgm}
METHOD FOR LUBRICATING SWING CIRCLE
Items to be prepared
Grease pump
1.
Lower the work equipment to the ground.
2.
By using a grease pump, apply grease to the grease fit-
tings marked by arrows (2 places).
3.
After greasing, wipe off any old grease that is pushed out.
EVERY 500 HOURS MAINTENANCE
Maintenance for every 50 and 250 hours should be performed at the same time.
MAINTENANCE PROCEDURE MAINTENANCE
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