Replacing High-Pressure Fuel Pump - Yanmar BY Series Service Manual

FUEL SYSTEM

Replacing High-Pressure Fuel Pump

A
DANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• When you remove any fuel system
component to perform maintenance
(such as changing the fuel filter) place
an approved container under the
opening to catch the fuel.
• NEVER use a shop rag to catch the
fuel. Vapors from the rag are
flammable and explosive.
• Wipe up any spills immediately.
• Wear eye protection. The fuel system
is under pressure and fuel could spray
out when you remove any fuel system
component.
• Failure to comply will result in death or
serious injury.
Removal
IMPORTANT
When working on the oil, coolant or fuel
circuits you must protect the alternator from
contamination. Cover alternator with
suitable materials. Failure to comply may
result in an alternator failure.
1. Disconnect the battery negative (-) cable.
2. Close fuel supply valve at fuel tank.
3. Remove intake manifold. See Intake Manifold
on page 5-70.
4. Remove alternator drive belt. See Remove and
Install Alternator on page 11-7 and Replace
Seawater Pump Belt on page 7-21.
6-20
5. Disconnect electrical connector
(Figure 6-20, (1)) from fuel measuring unit.
Immediately cap or plug all openings to
prevent contamination of system.
6. Disconnect fuel supply line (Figure 6-20, (2)).
7. Remove banjo bolt (Figure 6-20, (3)) and
disconnect fuel return line.
8. Remove high-pressure line (Figure 6-20, (4))
between pump and fuel rail using special tool
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OEM No. 13 5 020.
9. Remove plug (Figure 6-21, (1)).
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( 1 )
Figure 6-20
CAUTION
Figure 6-21
BY Service Manual
Repair
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( 3 )
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0000199en