4-78
[
4.18
1000 HOUR (12-MONTH) INSPECTION &
MAINTENANCE PROCEDURES
Thoroughly read and understand "SAFETY PRECAUTIONS" of this manual before performing the inspection and
maintenance.
Perform this section together with "EVERYDAY CHECK-UP and 50, 100, 120, 250, and 500 HOUR INSPECTION &
MAINTENANCE PROCEDURES".
4.18.1
REPLACING RETURN FILTER
PAY ATTENTION TO HOT PARTS
• The oil in the hydraulic oil tank is under high pressure and high temperature.
Before removing the cover, stop the engine first, remove the breather cap, press the valve, and release the
pressure from the tank.
• Immediately after engine operation, the oil is hot and it may cause burns. Wait until the oil temperature cools
down before attempting to change the hydraulic oil.
Hydraulic oil before filtration inside the filter contains dirt. When taking out the return filter, do not return the
hydraulic oil remaining in the filter back to the tank.
• As for the return filter element kit to be replaced, ask your KOBELCO authorized dealer for the part number and
then place an order.
Replace the return filter after 50 hours of operation has been reached for the first time, and then every 1,000
hours.
For breaker specification, replace it every 250 hours.
• A warning is displayed on the monitor not only when the remaining maintenance interval set from the monitor
becomes 0, but also when the return filter is clogged. (See "WARNING DISPLAY SCREEN" in Chapter 2)
Regardless of the setting time of maintenance, when the hydraulic oil filter replacement warning is displayed,
replace the return filter.
1.
Move the machine to a level and firm place.
2.
Park the machine in the hydraulic oil level inspection
position.
3.
Stop the engine and move the pilot control shut-off
lever to the "LOCKED" position.
Copyright©2020 Kobelco Construction Machinery Co.,Ltd. All rights reserved. [S2YY00041ZE03] [0701CsCshWbYs]