92
until packing surface contacts sealing surface of filter
holder.
5) Use wrench to fasten 2/3 turns. Pay attention not to over
tighten.
Note: With filter replaced, it‘s necessary to bleed air from
fuel system.
5.5.2.4 Clean Oil Suction Filter
Warning
With engine shut, parts and oil are at high temperature
which may lead to serious burns. Wait until temperature
cools down before starting maintenance operation.
There is pressure in hydraulic oil tank. Release pressure
first before opening oil fill cap on top of hydraulic oil
tank.
1) To facilitate access, swing upper turret 45
o
, then stop
excavator at level ground.
2) Position excavator with arm cylinder completely retracted
and bucket cylinder completely extended.
3) Lower bucket to the ground, run the engine unloaded at
low speed for 5 minutes. Stop the engine, remove key and
set pilot control lever to LOCK position.
4) Clean up upper hydraulic oil tank to prevent dirt getting
into hydraulic system. Press lock cap to release internal
pressure.
5) Remove hydraulic oil tank cover 2.
6) Remove oil suction filter and suspension bar unit 3. Rinse
filter. To replace filter, fix new filter on suspension bar,
tighten bolt at torque: 14.5 to 19.5 Nm (1.5 to 2 kgf·m).
7) Install oil suction filter and suspension bar unit 3, make
sure filter is positioned on the opening properly.
8) Install tank cover 1, make sure filter and suspension bar
are place in position. Tighten bolt at torque: 49 Nm
(5kgfm).
9) Start engine; run it unloaded at low speed for roughly 15
minutes to bleed air in main pump and hydraulic system.
10) Shut down engine.
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