Doosan LIGHTSOURCE V9, Operation And Maintenance Manual

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55
PERIODICAL INSPECTION AND MAINTENANCE
.
LIGHTSOURCE V9
(6) Air cleaner element inspection
AIR INTAKE SYSTEM
Air cleaner
Engine performance and life vary with the air intake conditions.
A dirty air cleaner element reduces the amount of intake air, causing
reduced engine output and possible engine damage.
Also, a damaged element leads to abrasion of cylinders and valves,
resulting in increased oil consumption, reduced output and shortened
engine life.
(1) Checking and adjusting cooling fan V − belt (2nd time and after)
Check and adjust the cooling fan V − belt tension every 200 hours
operation from 2nd time and on.
Inspection every 400 hours operation
(1) Replacing the air cleaner element
Replace the air cleaner element periodically even if it is not damaged
or dirty. When replacing the element, clean the inside air cleaner case
at the time. If having the air cleaner with double elements, do not
remove the inner element. If the engine output is still not recover (or the
dust indicator still actuates if having the air cleaner with a dust indicator)
even though the outer element has replaced with new one, replace the
inner element with new one.
Inspection every 800 hours operation
(1) Replacing cooling water
Cooling water contaminated
with
rust or water scale
−
reduces the
cooling effect. Even when antifreeze agent (LLC) is mixed, the cooling
water gets contaminated due to deteriorated ingredients. Replace the
cooling water at least Once a year.
1) Remove the header tank cap.
2) Remove the radiator drain plug of the radiator and drain the cooling
water.
3) After draining the cooling water, put the drain plug back.
4) Fill radiator and engine with cooling water via the header tank.
Beware of scalding by hot water
Wait until the temperature goes down before draining the Cooling water.
Otherwise, hot water may splash to cause scalding.
(2) Checking and adjusting the fuel injection valve
As the adjustment requires specialized knowledge and skill, .consult
your dealer. This adjustment is needed to obtain the optimum injection
pattern for full engine performance.
(3) Adjusting intake / exhaust valve clearance
As this adjustment requires specialized knowledge and skill, consult
your dealer. The adjustment is necessary to maintain the correct timing
for the opening and closing of valves. Neglecting the adjustment will
cause the engine to run noisily and result in poor engine performance
and other damage.
Inspection every 2000 hours operation
(1) Flushing the cooling system and checking the
cooling system parts
As this maintenance requires specialized knowledge and skill, consult
your dealer. Rust and water scale will accumulate in the cooling system
through many hours of operation. This lowers the engine cooling effect.
(2) Checking and replacing fuel hoses and cooling water hoses
As this maintenance requires specialized knowledge and skill, consult
your dealer. Regularly check the rubber hoses of the fuel system and
cooling water system. If cracked or degraded, replace them with new
one. Replace the rubber hoses at least every 2 years.
(3) Lapping the intake and exhaust valves
As this maintenance requires specialized knowledge and skill, consult
your dealer. The adjustment is necessary to maintain proper contact of
the valves and seats.
(4) Checking and adjusting the fuel injection timing
As this maintenance requires specialized knowledge and skill, consult
your dealer.