Blue Bird Coachworks 450 LXi, Руководство пользователя

Страница: 517 / 684

5-4 Generator Maintenance/Service
450 LXi Owner Manual
~ 5-4-14 ~
Rev. “C”
5-4.11.2 When Output is Insuffi cient
Cause Countermeasures
Carbon stuck around orifi ce of
nozzle piece Clean orifi ce and needle valve, being very careful not to damage the nozzle orifi ce.
Check nozzle to see if good. If not, replace with new parts. •
•
Compression is insuffi cient.
Leaking valves
Bad valve and excessive wear of rings, pistons and liners cause insuffi cient
compression. Replace with new parts.
Grind valves. •
•
Fuel is insuffi cient Check fuel system. •
Overheating of moving parts
Check lubricating oil system.
Check to see if lubricating oil fi lter is working properly.
Filter element deposited with impurities would cause poor lubrication. Change
element.
Check the clearance of bearing are within factory specs.
Check injection timing. •
•
•
•
•
Valve clearance is wrong.
Adjust to proper valve clearance of 0.145 to 0.185 mm (0.0057 to 0.0072 in.)
with engine cold. •
Air cleaner is dirty Clean the element every 100 hours of operation. •
Fuel injection pressure is wrong. Adjust to proper pressure. 13.7 Mpa (140kgf/cm2, 1991psi) •
Injection pump wear
Do not use poor quality fuel as it will cause wear of the pump. Only use No. 2-D
diesel fuel.
Check the fuel injection pump element and delivery valve assembly and replace
as necessary. •
•
5-4.11.3 When Engine Suddenly Stops
Cause Countermeasures
Lack of fuel
Check the fuel tank and refi ll the fuel, if necessary.
Also check the fuel system for air or leaks. •
•
Bad nozzle If necessary, replace with a new nozzle. •
Moving parts are overheated due
to shortage of lubrication oil or
improper lubrication
Check amount of engine oil with oil level gauge.
Check lubricating oil system.
At every 2 times of oil change, oil fi lter cartridge should be replaced.
Check to see if the engine bearing clearances is within factory specs. •
•
•
•
5-4.11.4 When Color of Exhaust is Especially Bad
Cause Countermeasures
Fuel governing device bad Contact dealer for repairs. •
Fuel is of extremely poor quality. Select good quality fuel Use No. 2-D diesel fuel only. •
Nozzle is bad If necessary, replace with new nozzle. •
Combustion is incomplete
Cause is poor atomization, improper injection timing, etc. Because of trouble
in injection system or in poor valve adjustment, or compression leakage, poor
compression, etc. Check for the cause. •
NOTE: When the engine has suddenly stopped, decompress the engine by the decomp and turn the engine
lightly by pulling on the fan belt. If the engine turns easily without abnormalities, the cause of the trouble is usually
lack of fuel or bad nozzle.