Doosan LIGHTSOURCE V9, Operation And Maintenance Manual

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52
PERIODICAL INSPECTION AND MAINTENANCE
.
LIGHTSOURCE V9
(2) Checking and adjusting cooling fan V − belt
When there is not enough tension in the V − belt, the V − belt will slip
making it impossible for the alternator to generate power and cooling
water pump and cooling fan will not work causing the engine to
overheat. Check and adjust the V − belt tension (deflection) in the
following manner.
1) Press the V − belt down with your thumb [approx. 100N(10.2kgf)]. at
the middle of the V − belt span to check the tension (deflection).
The specified deflection should be as follows.
A
7 9 mm
D. Radiator fan
E. Set bolt
F. Alternator
G. Deflection
H. Press with thumb
I. Crankshaft V − pulley
J. V − belt
2) If necessary, adjust the V − belt tension (deflection). To adjust the
V − belt tension, loosen the set bolt and move the alternator to tighten the
V − belt.
3) Visually check the V − belt for cracks, oiliness or wear. If any , replace
the
V
− belt with
new one.
(Adjusting the V − belt tension)
A. Adjust the V − belt tension by prying with a wooden bar
B. Alternator
C. Adjusting bracket
Use of genuine Doosan fan belt
Always use genuine Doosan fan belts as they provide high driving
ability and long operating durability. Use of non − Doosan fan belts could
result in premature belt wear or belt elongation leading to engine
overheating or excessive belt noise.
CAUTION:
To help avoid being injured, check and adjust the fan belt tension with
engine stopped.