Valve Clearances - Northern Lights M844W3 Operator's Manual

Cylinder No. 1 No. 2
Valve
In Ex In
Arrangement
When No. 1
cyl. is at TDC
in compression
stroke
With the
crankshaft
turned by 360
0
in normal
direction from
above
Figure 7: 844DW3 and 844LW3 Valve sequence
Figure 8: Valve Adjustment
Servicing
No. 3 No. 4
Ex In Ex In Ex
OM844W3 5/21
18
SP-6. VALVE CLEARANCES
1. Adjust valve clearance after 1000 hours or as needed.
2. To bring the No. 1 cylinder to top dead center in the
compression stroke, align the timing mark; the top
mark of the crank pulley with that of the timing gear
case. Remove the rocker arm cover and turn the
crankshaft forward and backward. If the inlet and
exhaust valves of the No. 1 cylinder do not move it is
in top dead center position. When the valves move,
or rock, turn the crankshaft one full turn and align the
top mark of the crank pulley with the top mark of the
timing gear case.
3. 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 (
Clearance on both intake and exhaust valves should be
0.008 in. (0.2 mm).
4. Repeat steps 3 and 4 for each cylinder. Each set of
valves must be adjusted individually.
5. Replace the rocker arm cover. Tighten cover nuts to
5 - 8 ft/lbs (0.8 - 2.3 kg/m).
).
Figure 10