Doosan D20S-5 Operation & Maintenance Manual page 190

Maintenance Section
5. Wipe up any spills and properly dispose of fuel.
6. NEVER use the starter motor to crank the
engine in order to prime the fuel system. This
may cause the starter motor to overheat and
damage the coils, pinion and / or ring gear.
To prime the fuel system on engines not equipped
with an electric fuel system:
1. Place an approved container under the air
bleed port.
2. Loosen the air bleed port (Figure 2, (1)) 2 or 3
turns.
3. Operate the fuel priming pump (Figure 2, (2))
until the fuel coming out of the air bleed port is
free of bubbles.
4. Tighten the air bleed port.
5. Wipe up any spills and properly dispose of fuel.
6. NEVER use the starter motor to crank the
engine in order to prime the fuel system. This
may cause the starter motor to overheat and
damage the coils, pinion and / or ring gear.
Figure 2
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