Hitachi ZW 550-6 Operator's Manual page 316

IMPORTANT: The machine is equipped with a
turbocharged engine. Cool down before stopping
the engine. Failure to do so may cause the lubricant
on the turbocharger bearing and seal surfaces
to be dissipated due to the intense heat present
inside the turbocharger, possibly damaging the
turbocharger.
4. Turn the key switch OFF to stop the engine. Leave the
machine untouched for 10 minutes.
5. Prepare a container of more than 120 L (32 gal)
capacity to receive the oil.
6. Remove drain plug (5) from the transmission bottom
to drain the oil. Dispose of the oil in accordance with
local regulations.
7. Loosen four bolts (6) with a 14 mm wrench.
8. Remove flange (7) together with the pipe and suction
strainer (8).
9. Remove set screw (9) using a 2.5 mm (0.1 in) hex
(allen) wrench from strainer (8).
10. Remove suction strainer (8) from flange (7).
Brush off any debris and clean with solvent.
f
NOTE: It is normal for a few fine particles to be on
strainer (8). Large pieces or a large quantity of particles
indicates a problem. Contact your authorized dealer if you
find excessive debris.
11. Reassemble and reinstall strainer (8), gasket (7) and
the drain plug with a new gasket (10).
12. Tighten four bolts (6).
Tightening torque: 53 N·m (5.4 kgf·m) (39 lbf·ft)
MAINTENANCE
7-32
6
7
5
115Z7B-7-32-1
95Z7-7-32-2