Blue Bird Coachworks 450 LXi, Owner'S Manual

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450 LXi Owner Manual 5-4 Generator Maintenance/Service
Rev. “C”
~ 5-4-15 ~
5-4.11.5 When Engine Must be Stopped Immediately
Cause Countermeasures
Engine revolution suddenly
decreases or increases.
Check the adjustments, injection timing and the fuel system. •
Unusual sound is heard suddenly Check all moving parts carefully. •
Color of exhaust suddenly turns
dark
Check the fuel injection system, especially the fuel injection nozzle. •
Bearing parts are overheated. Check the lubricating system. •
Oil lamp lights up during operation
Check lubricating system.
Check if the engine bearing clearances are within factory specs.
Check the function of the relieve valve in the lubricating system.
Check pressure switch.
Check fi lter base gasket. •
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5-4.11.6 When Engine Overheats
Cause Countermeasures
Engine oil insuffi cient. Check oil level. Replenish oil as required. •
Fan belt broken or elongated Change belt or adjust belt tension. •
Coolant insuffi cient Replenish coolant. •
Excessive concentration of
antifreeze
Add water only or change to coolant with the specifi ed mixing ratio. •
Radiator net or radiator fi n clogged
with dust
Clean net or fi n carefully. •
Inside of radiator or coolant fl ow
route corroded
Clean or replace radiator and parts. •
Fan or radiator or radiator cap
defective
Replace defective part. •
Thermostat defective Check thermostat and replace if necessary. •
Temperature gauge or sensor
defective
Check temperature with thermometer and replace if necessary. •
Overload running Reduce load. •
Head gasket defective or water
leakage
Replace parts. •
Incorrect injection timing Adjust to proper timing. •
Unsuitable fuel used Use the specifi ed fuel. •