Drain Fuel Filter; Draining Procedures (Pre-Filter) - Hitachi ZW 370-6 Operator's Manual

Drain Fuel Filter

--- every 10 hours (daily)
IMPORTANT: Drain fuel filter daily before starting
operation. The engine may be damaged if you do not
drain fuel filter daily. Drained water should contain
fuel. Follow the local regulations when disposing it.
Fuel pre-filters have water separator function, which allows
float to rise as water accumulates.
Be sure to drain the accumulated water daily until float goes
to the bottom of case.

Draining Procedures (Pre-Filter)

1. Connect transparent drain hose (2) stored in the tool
box to drain (1).
2. Place 0.5 liters or larger capacity container under drain
hose (2) to collect the drained water.
3. Rotate drain (1) on the bottom of the filter
counterclockwise. Drain the water accumulated in the
filter until float (4) goes to the bottom of case. If it is
difficult to drain, loosen plug (3) on the top of the fuel
pre-filter.
Wrench size: 14 mm (0.55 in)
4. After draining water, securely tighten drain (1) and plug
(3).
Draining off of two pre-filters.
Tightening torque:
Drain (1): 2.5±0.5 N·m (0.25±0.05 kgf·m, 1.8±0.4 lbf·ft)
Plug (3): 10±2 N·m (1.0±0.2 kgf·m, 0.74±0.15 lbf·ft)
5. Start the engine. Check drain (1) and plug (3) for fuel
leaks.
IMPORTANT: After draining water from the fuel filter,
bleed air from the fuel supply system.
IMPORTANT: Do not use alcoholic gas dryer fuel
additives to remove water in fuel to avoid cracks in the
pre-filter transparent case.
MAINTENANCE
7-59
95Z7B-7-69-1
Fuel Pre-Filter
Pre-Filter
95Z7-7-59-1
3
4
1
2
95Z7-7-59-2
3