System priming, Priming fuel system, Engine cooling system – MacDon M155 Operators Manual User Manual
Page 326: Warning
System Priming
Controlled venting of air is provided at the injection pump through the fuel drain manifold. Small amounts of air
introduced by changing filters or injection pump supply line will be vented automatically, if the fuel filters are
changed in accordance with instructions.
IMPORTANT:
Bleeding the fuel system is NOT recommended or required. Manual priming will be required if:
• Fuel filter is replaced.
• Injection pump is replaced.
• High-pressure fuel lines are replaced.
• Engine is run until fuel tank is empty.
Priming Fuel System
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
Opening Hood (Lower Position), page 266
.
3. Turn the priming knob (A) counterclockwise to unlock
the plunger on the primary filter 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
Figure 5.95: Fuel System
Engine Cooling System
The engine cooling system is designed to maintain the engine operating temperature within the specified
operating range.
NOTE:
Antifreeze is essential in any climate. It broadens the operating temperature range by lowering the
coolant freezing point, AND by raising its boiling point. Antifreeze also contains rust inhibitors and
other additives to prolong engine life.
IMPORTANT:
If antifreeze strength is not adequate, do NOT drain cooling system to protect against freezing.
System may not drain completely and damage from freezing could still result.
Refer to
Lubricants, Fluids, and System Capacities, page 263
for detailed information.
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