Northern Lights NL673L, Руководство оператора

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ONL673L 7/13
18
Servicing
SP4. AIR CLEANER
1. After every 25 hours of operation, take out the ele-
ment and clean by blowing in compressed air (7
kg/cm2 max.) from inner side.
2. In case soot or oil is found adhered on element, soak
for about 15 minutes in detergent solution, and after
washing several times, rinse thoroughly with clean
water. Then use after allowing to dry naturally.
3. When used in dusty places, clean earlier than usual.
4. Replace with new element once every year. Part
number is:
NL673L – #408620002
5. After cleaning, shine a light from the element if
found to be torn, or with pin holes, or thin places.
Replace gasket if damaged.
6. Never use any element that is not suffi ciently dry.
NOTE: Make absolutely sure no impurities enter
the engine while changing the element. Do NOT
run the engine with the air cleaner removed.
SP5. V-BELTS
1. Check the tension and wear on the V-belt daily.
2. Use your thumb to press on the belt at the midpoint
between the crankshaft and alternator pulleys. The
tension is correct if the belt can be depressed about
3/16 in. (5 mm).
Figure 10: Valve Adjustment
SP6. VALVE CLEARANCES
1. Readjust valve clearance after fi rst 50 hours of
operation and every 1000 hours thereafter.
2. Valve adjustments should be done after the cylinder
head bolts have been re-tightened. Engine should be
cold and NOT running.
3. Watch the valves while turning the engine over by
hand. Turn until the #1 cylinder inlet valve starts to
open and the exhaust valve starts to close (the valves
are rocking). Then turn the crankshaft one more full
turn and adjust the clearance on both valves for this
cylinder.
4. Loosen the lock nut and adjust the clearance between
the rocker arm and valve stem of both the intake and
exhaust valves with the adjustment screw (
Figure
10
). Clearance on both intake and exhaust valves
should be 0.008 in. (0.2 mm).
5. Repeat steps 3 and 4 for each cylinder. Each set of
valves must be adjusted individually.
6. Replace the rocker arm cover. Tighten cover nuts to
7.2 - 8.7 ft/lbs (1.0 - 1.2 kg/m).