Yanmar 4LHA-HTP Operation Manual page 52

5.2.3 Inspection Every 250 Hrs. or 1 yr.
(1) Replacing the Fuel Filter
1) 4LHA-HTP/-HTZP
©Close the fuel cock of the fuel tank.
©Drain the fuel from the fuel drain cock at the
bottom of fuel filter. See. 5.2.2(3)
©Remove the connectors of the wiring and
remove the alarm switch using spanner.
©Remove the fuel filter using filter wrench.
©Tighten the new fuel filter. (Clean the fuel filter
mounting surface).
Part No. of the fuel filter : 121857 - 55710
• Install the alarm switch to the new fuel filter.
• Apply fuel to the gasket of the new fuel filter.
• Lightly screw in the fuel filter in position and tighten it until the gasket comes into contact
with the seat.
• Manually tighten the filter by a 3/4 turn,
[tightening torque: 14.7-19.6 N-m(1.5-2.0 kgf-m)]
• Connect the alarm switch wiring.
©Fill fuel to the fuel filter, (see 3.2.2)
• If you spill fuel, wipe such spillage carefully.
• Start the engine to check for fuel leakage.
2) 4LHA-DTP/-DTZP/-STP/-STZP
Replace the fuel filter element periodically before
there is clogging and the fuel flow is reduced.
©Ciose the fuei cock of the fuei tank.
©Remove the drain plug and discharge the fuel
oil in the fuel fiiter. (put a pan under the drain
to catch the fuel)
©Loosen center bolt of the filter, remove the
lower case, and replace the element.
Part No. of the fuel filter element : 41650-
550800
©Fill fuel to the fuel filter (See 3.2.2)
• If you spill fuel, wipe such spillage carefully.
• Start the engine to check for fuel leakage.
Rubber packing
- 4 8 -
Fuel filter
^ ^ Q h - C e n t e r bolt
Element
Center bolt