Trouble Analysis - JAC HFC7151M1V-U221B Workshop Manual

VII. Trouble Analysis
Improper heat radiation
Insufficient air flow
Damaged wind collection
cover
Incorrect blend ratio of
coolant
Poor quality of engine
coolant
Insufficient engine coolant
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Poor ventilation
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Table for Overheating Cause Analysis
Symptom
Water pump
malfunction
Stuck of thermostat at
closed position
Radiator is damaged
The radiator cooling is
blocked
The cooling fan fails to
work
The resistance for fan
rotation is too large
The fan blade is
damaged
—
—
—
Engine coolant leaks
The engine is
overloaded
The vent of bumper is
blocked
The radiator grill is
blocked
The radiator is blocked
The condenser is
blocked
Item should be inspected
Worn or loosening of drive
belt
Blockage due to dust or
paper scraps
Mechanical damage
Excessive foreign
substances (corrosion,
pollutants, sand, etc.)
Fan assembly
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Viscous engine coolant
Coolant hose
Water pump
Radiator cap
Coolant reservoir
Abnormal driving
Drive train failure
Wheel and tyre with
incorrect specifications
mounted
Braking drag
Incorrect ignition timing
—
Cover mounted
Blockage of slurry or
paper scraps
—
Poor ventilation
Mechanical Part of
Engine
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Loose clamp
Broken hose
Improper sealing
Looseness
Poor sealing
Broken radiator coolant
reservoir
Broken radiator core
Breakage of stock solution
tank
Excessively high engine
speed in the case of
no-load
Long-term traveling
Driving at ultra high-speed
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