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IDENTIFY ENGINE SIDES
To ensure proper reassembly, it is necessary to identi-
fy the engine sides and various other engine compo-
nents. Refer to Figure 9-21. The #1 side of engine
has the cylinder barrel closest to the flywheel end of
crankshaft.
The #2 side of engine has the cylinder
barrel closest to the PTO end of crankshaft.
D
Cylinder Barrel
Figure 9-21. Identifying Engine Sides.
NOTE: To prevent damage to the engine crank-
case and other components, do not mark
using a metal stamp.
1. With a marking pen, paint, or chalk, mark the
crankcase halves and cylinder heads as 41 side
and #2 side.
2. The cylinder barrels are already identified as #1 or
#2 by a mark stamped near the valve cover/
breather gasket surface.
3. Identify other engine components, such as the
valves, pistons, connecting rods and rod caps,
and valve tappets, prior to removal or
disassembly.
REMOVE SPARK PLUGS
AND CYLINDER HEADS
1. Remove the spark plugs from cylinder heads.
2. Remove the hex. cap screws, plain washers, cyl-
inder heads, and gaskets.
Refer to Figure 9-22.
SECTION 9
DISASSEMBLY
Spark Plug
Cylinder Head
Figure 9-22.
Removing Spark Plugs
and Cylinder Heads.
REMOVE CYLINDER BARRELS
1. Remove the hex. nuts and plain washers using the
barrel wrench.
Refer to Figure 9-23.
Cylinder
Barrel
M I Hex Nuts And
Plain Washers (6)
Figure 9-23. Removing Cylinder Barrel Fasteners.
2. Using a soft-faced hammer, carefully tap the cyl-
inder barrels between the intake and exhaust ports
to break the seal between cylinder barrels and
crankcase.
3. Support the weight of barrels with hands, and
carefully pull the barrels from the studs and pis-
tons.
Refer to Figure 9-24.
NOTE: To prevent damage to pistons or connect-
ing rods when removing barrels, make
sure the cylinder barrels and connecting
rods are supported at all times. Do not
allow the pistons or connecting rods to
drop against edges of crankcase,
9.7
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