Yanmar 4HLA-HTP Manual Del Usuario página 49

(3) Drain the fuel filter
When water and dirt are mixed in with the fuel, it becomes impossible for the fuel injection pump
and the valve to work. Drain periodically to keep the filter from becoming clogged. When there
is a lot of drain collected in the oil/water separator at the bottom of the fuel filter, the fuel filter
alarm lamp on the control panel (optional) will light up. (4LHA-HTP/-HTZP)
1) 4LHA-HTP/-HTZP
①Close the fuel cock on the fuel pipe line.
②Open the drain cock at the bottom of the
fuel filter oil/water separator, and drain off any
water and dirt collected inside.
③Close the drain cock.
④Be sure to bleed air out of the fuel system.
2) 4LHA-DTP/-DTZP/-STP/-STZP
①Close the fuel cock on the fuel pipe line.
②Loosen the drain plug at the bottom of the
fuel filter and drain off any water and dirt
collected inside.
③Retighten the drain plug.
④Be sure to bleed air out of the fuel system.
→ See 3.2.2.
→ See 3.2.2.
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Fuel filter
Drain cock
Fuel filter
Drain plug