Yanmar 4BY, Service Manual

Page: 154 / 275

FUEL SYSTEM
BY Service Manual 6-25
Repair
Replacing Fuel Fine Filter
1. Disconnect the battery negative (-) cable.
2. Close the fuel tank cock.
Figure 6-34
3. Loosen inlet (Figure 6-34, (1)) and outlet
(Figure 6-34, (2)) hose clamps and remove
hoses from filter.
4. Remove bolts (Figure 6-34, (3)) .
5. Remove mounting brackets and install on new
filter. Ensure fuel flow direction is correct.
IMPORTANT
When replacing fuel filters, always pre-fill
them with fresh, clean fuel to improve the
system ability to be bled.
6. Install on electrical bracket and tighten screws
securely.
7. Install hoses and tighten new clamps to
specification. See Hose Clamps on page 3-19.
8. Connect battery negative (-) cable.
9. Bleed the fuel system and check for leaks. See
Bleeding the Fuel System on page 6-29.
CAUTION
• ALWAYS be environmentally
responsible.
• Follow the guidelines of the EPA or
other governmental agencies for the
proper disposal of hazardous
materials such as engine oil, diesel
fuel and engine coolant. Consult the
local authorities or reclamation facility.
• NEVER dispose of hazardous
materials irresponsibly by dumping
them into a sewer, on the ground, or
into ground water or waterways.
• Failure to follow these procedures may
seriously harm the environment.
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