Hitachi ZW 370-6 Operator's Manual page 363

Element Replacement Procedure
1. Connect transparent drain hose (4) stored in the tool
box to drain (3).
2. Place 1 liter (1 quart) or larger capacity container under
drain hose (4) to hold the drained water and fuel.
3. Loosen air bleed plug (1) and drain (3). Drain fuel until
fuel does not flow out of the filter.
After draining fuel, remove drain (3) and replace O-ring
at drain (3).
4. Remove transparent filter case (2) using the provided
filter wrench.
5. When transparent filter case (2) is removed, the element
and O-ring for transparent filter case (2) is exposed.
Remove the element by hand.
IMPORTANT: Do not overtighten the filter case.
6. Install a new element. Replace transparent filter case
O-ring and tighten transparent filter case (2) using the
provided filter wrench.
m : 30 ± 2 N·m (3±0.2 kgf·m, 22±1.5 lbf·ft)
7. Tighten air bleed plug (1) and drain (3).
8. Repeat for the other water separator.
9. Bleed Air from the Fuel System
After replacing the water separator elements, bleed air
from the fuel supply system.
(Refer to "Bleed Air from the Fuel System" in item
Wrench size: 10 mm (0.4 in)
MAINTENANCE
.)
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MDAA-07-009