Operation and maintenance manual

DX140R/DX140LCRInspection, Maintenance and Adjustment
4-48
Replace Hydraulic Oil Return Filter
NOTE: Change hydraulic oil return filter after first 250 hours
of operation or rebuild, and every 1,000 hours
thereafter.
NOTE: If return
filter clogged warning light (Figure 80) on
instrument panel comes "ON" the return filter must be
serviced.
1. Park machine on firm and level ground. Lower the front
attachment to the ground and stop engine.
2. Lift the breather cap (1, Figure 81) slightly to release the
internal pressure.
3. Remove bolts (2, Figure 81) and service cover (3).
Remove spring (4), valve (5) O-ring (6), and bypass
stra
iner (7), and then filter (8).
4. Remove filter and discard.
NOTE: Us
ed filter should always be disposed of
according to local regulations.
5. Install new filter and a new O-
ring. Install bypass strainer,
valve and spring. Install service cover plate.
6. Tighten the breather cap (1, Figure 81).
7. Run engine for ten minutes at low idle to purge air from circuit.
8. Check level in hydraulic oil tank (See page 4-17). Add oil if
necessary.
FG013832
Figure 80
1
3
2
FG014437
Figure 81
WARNING
AVOID DEATH OR SERIOUS INJURY
The hydraulic oil will be hot after normal machine
operat
ion. Allow the system to cool before attempting to
service any of the hydraulic components.
The hydraulic tank is pressurized. Loosen the hydraulic
breath
er cap slightly to allow the pressurized air to vent.
After the pressure has been released, it is safe to remove
either the fill cap or service covers or drain water from the
tank.
Figure 82
7
5
8
4
36
FG000761
IMPORTANT
Make sure to clean any dirt or water from the top of the
hydraulic tank, especially around the fill port and filter
ports.