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MAINTENANCE AND SERVICING
System Priming
Controlled venting of air is provided at the injection pump through the fuel drain manifold. Small amounts of air
introduced by changing
fi
lters or injection pump supply line will be vented automatically, if the fuel
fi
lters are
changed in accordance with instructions.
IMPORTANT:
Bleeding the fuel system is
NOT
recommended or required. Manual priming will be required if:
• Fuel
fi
lter is replaced
• Injection pump is replaced
• High-pressure fuel lines are replaced
• Engine is run until fuel tank is empty
Priming Fuel System
To prime the fuel system, follow these steps:
DANGER
To avoid bodily injury or death from unexpected startup of the machine, always stop the engine and remove
the key from the ignition before leaving the operator’s seat for any reason.
WARNING
The fuel pump high-pressure fuel lines and fuel rail contain extremely high pressure fuel. Never loosen
any fittings. Personal injury and property damage can result.
1. Stop the engine and remove the key.
2. Open the hood to lowest position. Refer to
5.2.1 Opening Hood (Lower Position), page 306
.
3. Turn the priming knob (A) counterclockwise to unlock
the plunger on the primary
fi
lter head.
4. Pump approximately 120 times to pressurize the
fuel system.
5. Lock the plunger by turning knob (A) clockwise
until snug.
6. Try starting engine.
If engine does
NOT
start,
repeat priming.
7. Close hood.
Refer to
5.2.2 Closing Hood (Lower
Position), page 307
.
Figure 5.86: Fuel System
147649
352
Revision A
Summary of Contents for M155
Page 3: ...Declaration of Conformity Figure 1 Declaration of Conformity Page 1 of 2 147649 i Revision A ...
Page 4: ...Figure 2 Declaration of Conformity Page 2 of 2 147649 ii Revision A ...
Page 30: ...SAFETY Figure 1 21 Safety Signs Left Cab forward Side 147649 14 Revision A ...
Page 32: ...SAFETY Figure 1 23 Safety Signs Right Cab forward Side 147649 16 Revision A ...
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Page 414: ...MAINTENANCE AND SERVICING Fuse Box Decal Figure 5 178 Fuse Decal 147649 398 Revision A ...
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