6-21
TROUBLESHOOTING
Symptoms Major causes Action
Travel speed cannot be
changed
• Fuse is blown • Replace the fuse.
Refer to page 6-8.
Slewing is not possible or not
smooth.
• Insufficient grease on slew
bearing
• Add grease.
Refer to page 5-52.
Hydraulic oil temperature is
too high
• Hydraulic oil level is too low • Add up to the specified level
Refer to page 5-24.
Starter motor turns but
engine does not start
• Insufficient fuel • Add fuel.
Refer to page 5-23.
• Air in fuel system • Bleed air.
Refer to page 6-10.
• Water in fuel system • Drain water.
Refer to page 5-35.
• Fuel is frozen • Warm the fuel pipe with hot
water or wait until the
ambient temperature
becomes high.
• Engine control system is
faulty.
• Adjust or repair (ask your
sales or service dealer).
• Fuel line is faulty. • Adjust or repair (ask your
sales or service dealer).
• Preheating device is faulty. • Adjust or repair (ask your
sales or service dealer).
Engine exhaust is white or
bluish
• Excessive engine oil • Adjust to the specified level.
Refer to page 5-21.
• Insufficient engine warm-up. • Perform the warm-up
operation.
Refer to page 3-5.
• Engine control system is
faulty.
• Adjust or repair (ask your
sales or service dealer).
• Fuel line is faulty. • Adjust or repair (ask your
sales or service dealer).
• Prolonged idling (approx.
two hours or more)
• Increase the engine RPM
and check for smoke.
• Poor fuel • Replace the fuel.
OTHER SYMPTOMS
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