Doosan DL220, Operation And Maintenance Manual

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OP001015 Inspection, Maintenance and Adjustment
4-24
Check Hydraulic System Oil Level
1. Move machine to a level area and shut down engine.
2. Apply parking brake.
3. Lower bucket to ground.
4. Check sight gauge that is attached to hydraulic tank. Oil
level must be visible in red centered circle shown on sight
gauge (1, Figure 18).
5. To add hydraulic oil, turn breather cap (1, Figure 19) slowly
to allow pressurized air to vent.
6. Remove upper cover (2, Figure 19) from hydraulic oil tank
and raise boom at max. height and replenish oil to the top
of sight gauge (Figure 18).
The hydraulic oil fill cover also serves as the hydraulic oil
strainer access cover. It is important to replace this cover and
the components in the proper order and alignment.
The filter (2, Figure 20), retaining rod (3) and spring (4) are
assembled as shown in Figure 20. The hole (1) in the base of
the filter fits over a circular base in the bottom of the tank. The
retaining rod (3) screws into the top of the filter (2), but the
spring (4) slides over the top of the rod. Be certain that this
spring does not fall into the tank during reassembly.
1. If filter assembly was removed, insert assembly into the
tank and check to make sure it is securely in place.
Figure 17
HAOA060L
WARNING
The hydraulic oil will be hot after normal machine
operation. Allow system to cool before attempting to
service any of the hydraulic components.
The hydraulic tank is pressurized. Turn breather cap slowly
to allow pressurized air to vent. After the pressure has been
released, it is safe to remove either the fill cap or service
covers.
FG008086
Figure 18
1
2
FG008087
Figure 19
IMPORTANT
Do not fill above red centered circle on sight gauge.
Overfilling can result in damage to equipment and oil
leaking from hydraulic tank due to expansion.
3
4
2
1
FG002188
Figure 20