Problem 4: Engine Smokes More Than Normal
After Warm-up
Probable Cause(s):
• Engine wear or mechanical problem
• Engine not at normal operating temperature
• Restriction in air intake system
• Incorrect or poor quality fuel
1. Engine wear or mechanical problem:
a. Observe the color of the smoke. If the smoke is
dark black or blue, go to Step b. If the smoke is
white, go to Step 2.
b. Report the problem of more than normal black
or blue smoke to Unit Maintenance for repair.
2. Engine not at normal operating temperature:
a. After the engine has idled for approximately five
minutes, observe the engine coolant
temperature gauge. If the engine coolant
temperature is below normal, go to Step b. If the
engine coolant temperature is normal, go to
Step 3.
b. While operating the engine at low idle, lift and
lower the blade for several minutes. If the engine
coolant temperature does not increase to
normal, refer the problem to Unit Maintenance
for repair. If the engine coolant temperature
increases to normal but the white smoke
remains, go to Step 3.
3. Restriction in air intake system:
a. Check the air filter indicator. If red does not
appear in the window, go to Step 4. If red
appears in the window, go to Step b.
b. Clean the primary air filter element, and check
the engine operation. If the white smoke is still
greater-than-normal, go to Step 4.
4. Incorrect or poor quality fuel:
a. Check the grade of fuel which was last added to
the tank. If the fuel grade is not correct for the
current operating environment, go to Step b. If
the fuel grade is correct for the operating
environment, go to Step c.
b. Report the fuel quality problem to Unit
Maintenance.
c. Report the problem of more than normal amount
of white smoke to Unit Maintenance for repair.
Problem 5: Engine Overheats During Normal
Operation
Probable Cause(s):
• Low engine coolant level
• Low engine or power train oil levels
• Cooler cores blocked
• Cooling fan not operating
• Restriction in exhaust system
• Water to antifreeze ratio too high for operating
environment
NOTICE
If the engine is overheating, investigate the cause
immediately. Operating the machine while the engine
is overheating may cause damage.
1. Low engine coolant level:
At operating temperature, the engine coolant is
hot and under pressure. Any contact with the
skin can cause severe burns. Also, cooling
system additive contains alkali. Avoid contact
with the skin, eyes, and mouth. Do not open the
engine coolant fill cap until the temperature of the
engine coolant is below 36°C (98°F).
a. Check the coolant level. If the coolant level is
normal, go to Step 2. If the coolant level is
below normal, go to Step b.
b. Inspect the machine for visible coolant leaks. If
leaks are found, go to Step c. If no leaks are
found, go to Step d.
c. Report the location of the coolant leak to Unit
Maintenance for repair.
WARNING
!
91
Operation Section
Troubleshooting
TM5-2430-200-10
