Replace Fuel Pre-Filter Element - Hitachi ZW 370-6 Operator's Manual

Replace Fuel Pre-Filter Element

---every 500 hours or when fuel filter restriction
indicator is lit
IMPORTANT:
 Be sure to use only genuine Hitachi elements for the
fuel main filter element and the pre-filter element.
Failure to do so may lower engine performance and/
or shorten the engine service life.
 Do not allow dirt and/or water to enter the fuel
system.
 Never pre-fill the filters.
Procedures:
1. Connect transparent drain hose (6) stored in the tool
box to drain (5).
2. Place 1 liter (1 quart) or larger capacity container under
drain hose (6) to hold the drained water.
3. Loosen air bleed plug (7) and drain (5). Drain fuel until
the filter is empty.
After draining fuel, remove drain (5) and replace the
gasket at drain (5).
4. Remove transparent filter case (11) using the provided
filter wrench.
5. When transparent filter case (11) is removed, the
element and O-ring for transparent filter case (11) is
exposed. Remove the element by hand.
IMPORTANT:
 When cleaning transparent filter case (11), use clean
diesel oil. DO NOT use acid or alcohols solvent such
as parts cleaning detergent, oil with gas dryer, etc.
These organic material may cause cracks or cloud on
the resin case.
 Do not overtighten the filter case.
6. Install a new element. Replace transparent filter case
O-ring and tighten transparent filter case (11) using the
special tool.
m : 30 ± 2 N·m (3±0.2 kgf·m, 22±1.5 lbf·ft)
Wrench size: 14 mm (0.55 in)
7. Tighten air bleed plug (7) and drain (5).
8. Repeat for the other filter.
9. Turn the starter key to the ON position.
IMPORTANT: Do not start the engine.
MAINTENANCE
7-64
95Z7B-7-69-1
Fuel Pre-Filter
7
11
5
6
95Z7-7-59-2
Pre-Filter
95Z7-7-59-1
7