Doosan DX700LC Operation And Maintenance Manual page 244

5. Drain hydraulic oil from tank into a container capable of
holding 280 liters (74 U.S. gal.). After draining tank, install
drain plug.
IMPORTANT
Be careful of squirting oil when removing drain plug.
NOTE: Used filter and used oil should always be
disposed of according to local regulations.
6. Carefully remove bolts and cover (2, Figure 104) from top
of hydraulic oil tank. There is a spring (3) under the cover
that will force the cover up.
7. Remove spring (3, Figure 104) and strainer (5), by pulling
on rod (4).
8. Clean inside and outside of strainer. Replace strainer if it is
broken.
9. Position strainer (5, Figure 104) on boss portion of suction
pipe (6).
NOTE:
Measurement "A" is 787 mm (30.98 in).
10. Fill the hydraulic oil tank. Check level using sight gauge on
side of tank.
11. Place spring (3, Figure 104) on rod (4) and assemble cover
(2).
12. After replacing and cleaning the hydraulic oil, filter and
strainer, vent the system. See "Venting and Priming
Hydraulic System" on page 4-89.
IMPORTANT
When the hydraulic breaker is being used, due to the
higher heat generated by this unit, use replacement
intervals recommended under the "Hydraulic Oil and
Filter Service Intervals" on page 3-36.
13. Check level of hydraulic oil tank. (See page 4-15)
Inspection, Maintenance and Adjustment
4-56
Figure 102
A
Figure 103
Figure 104
FG015797
HAOC411L
1
2
3
4
5
6
ARO1720L
OP001123