Doosan DX700LC Operation And Maintenance Manual page 233

Change Pilot Filter
NOTE: Change pilot filter after first 250 hours of operation or
rebuild, and every 1,000 hours thereafter.
NOTE: If pilot filter clogged warning light (Figure 75) on
instrument panel comes "ON" the pilot filter must be
serviced.
The hydraulic oil will be hot after normal machine
operation.
Allow the system to cool down before changing pilot filter.
1. Position the machine on firm, level ground. Lower the front
attachment to the ground and shut down engine.
2. Lift the breather cap (1, Figure 73) slightly to release the
internal pressure.
3. Locate pilot system filter assembly. See Figure 76.
4. Unscrew canister (5, Figure 77) and remove O-ring (3) and
filter cartridge (4).
NOTE:
The canister will be filled with oil. Use caution
when removing this assembly.
5. Insert a new filter cartridge and O-ring. Apply a small
amount of oil around the entire O-ring and install the
canister assembly onto the filter head (1, Figure 77).
NOTE: Used filter should always be disposed of
according to local regulations.
6. After changing pilot filter, vent air from pump and check
level of hydraulic oil tank.
Inspection, Maintenance and Adjustment
WARNING
Figure 75
Figure 76
2
Figure 77
FG013895
FG016136
1
3
4
5
FG000323
OP001123
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