NOTICE
• 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.
• 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.
• When the new V-belt is installed, readjust it after operating for 1 hour.
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.
METHOD FOR LUBRICATING
NOTICE
• If any unusual noise is generated from any greasing point, perform greasing regardless of the
greasing interval.
• Perform greasing every 10 hours for the first 50 hours of operation on a new machine. Also, perform
greasing at 250 hours and 500 hours of operation on a new machine.
• After the machine is subjected to digging work in the water, be sure to grease the wet pins.
• When performing heavy-duty operations, such as hydraulic breaker operations, perform the greas-
ing every 100 hours.
MAINTENANCE PROCEDURE MAINTENANCE
4-46
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