Northern Lights M843JK, Руководство оператора

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O843K 05/03
SP4. AIR CLEANER
1. Inspect air cleaner every 200 hours. In dusty
conditions, check more often.
2. Marine sets: if dirty, wash element in soapy water.
Rinse and dry thoroughly before re-installing.
Replace if necessary. Part numbers are:
M843JK and M843NK – #24-23100
3. Industrial sets: the element cannot be cleaned.
Replace it when necessary. Part number is:
NL843NK – #314531127
4. 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 after
every 50 hours.
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).
RETIGHTENING CYLINDER HEAD BOLTS
1. Tighten bolts when the engine is cold.
2. Loosen the nuts and remove rocker arm cover.
3. Tighten head bolts with a torque wrench in the order
shown in figures below. Tighten bolts evenly in 2 or
3 passes, ending at the specified torque in final pass.
843JK & 843NK: 60 - 64 ft/lbs (9.0 - 9.5 kg/m)
Servicing
Figure 7: 843N Head Torque Sequence
Figure 8: Valve Adjustment
SP6. VALVE CLEARANCES
1. Adjust valve clearance after first 50 hours of
operation and every 600 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 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 guide of both the
intake and exhaust valves with the adjustment screw
(
Figure 8
). 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
5 - 8 ft/lbs (0.8 - 2.3 kg/m).
13
Valve Adjustment Screw
Rocker Arm
0.008 in.
0.200 mm.