Hitachi ZAXIS 135US-5B Operator's Manual page 328

Draining Procedures (Pre Filter)
1. Place a container with a capacity of 0.5 liters or larger
under drain hose (6) to collect the drained water.
2. Rotate drain plug (5) on the bottom of the filter
counterclockwise. Drain the water accumulated in the
filter until float (8) goes to the bottom of case. If it is
difficult to drain, loosen plug (7) on the top of the fuel
pre-filter.
3. After draining water, securely tighten drain plug (5) and
plug (7).
4. Start the engine. Check drain plug (5) and plug (7) for
fuel leaks.
IMPORTANT: After draining water mixed in fuel, bleed air
from the fuel supply system.
Wrench size: 14 mm
MAINTENANCE
7-54
ZX135US-5B
Pre-Filter
ZX225US-5B, 225USLC-5B
Pre-Filter
7
8
5
6
Main Filter
Pre-Filter
M1U4-07-029
Main Filter
MDCN-07-032
MDAA-07-077
MDAA-07-078