Hitachi EX1900-5 Operator's Manual page 202

Replace Fuel Filter
--- every 1000 hours
IMPORTANT: Be sure to prepare a container large
enough to collect fuel when replacing
fuel filter to avoid ground contamination
and for safety.
1. Stop the engine.
2. Close cock (6) on the inlet line.
3. Unscrew filters (9) from the filter head, discard filters.
4. Fill the filter with clean fuel. Apply a light even coat of
lubricating oil to the gasket sealing surface prior to in-
stalling the filter.
5. Position filter (9) to the filter head. Tighten by hand un-
til the seal touches the filter head, tighten an addi-
tional one-half to three-fourths turn.
NOTE: Be sure to tighten the filter by hand. If any tools
are used for tightening, breakage or deforma-
tion of the filter head may arise.
6. Two fuel filters are located on either side of the engine.
Four fuel filters in total are used. Replace each filter
following the same procedure.
7. Open stop valve (6) at the bottom of the fuel tank.
MAINTENANCE
7-70
9
6
M18C-07-028
M18C-07-014