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6.
DISASSEMBLY
and
REASSEMBLY
6-1
PREPARATIONS
and
SUGGESTIONS
1)
When disassembling engine, carefully note mounting positions and methods of respective parts in order
to
be able
to
reassemble them correctly. Tag parts,
if
there is
a
possibility of confusion.
2)
Prepare several boxes to keep parts belonging to respective groups together.
3)
In order to prevent missing or misplacing, group related parts together, tentatively assembling them immediately after
disassembling each sub-assembly.
4)
Carefully handle parts, and clean them with washing oil after disassembling.
5)
Use correct
tools
in correct ways.
6)
Standard tools to be prepared for disassembling.
a) Work Bench
b)
'
Washing Pan
c) Disassembling
Tools
d) Washing
Oil
(Kerosene or Gasoline), Mobile Oil
e) Emery Paper, Cloth
7)
Drain fuel and
oil
without fail before disassembly.
To
drain oil, unscrew the oil drain plug located on the side of crankcase on carburetor side by turning it
counter-clockwise.
8)
Clamp cylinder head, cylinder main bearing cover, connecting rod, spark plug, and flywheel with specified torque when
reassembling them.
9)
Replace all the packings and gaskets with new ones when reassembling.
IO)
Wash parts with new gasoline
or
washing oil, and blow them with compressed air before reassembling.
1 1
)
Apply mobile
oil
to
the
rotating and sliding parts.
12)
Be careful not to contaminate parts with dust during reassembling.
13)
Tighten
bolls,
nuts, and screws
to
correct torque readings specified.
If
small screws are tightened too strongly, they may
be broken.
14)
After reassembling, turn the moving parts by hand, and check them for signs of abnormal friction, noises,
or
looseness.
6-2
SPECIAL TOOLS
""
..
.
~
"
c
"
3
"
-
."
-.
.
""
-
VALVE
SPRING
COMPRESSOR
Fig.
6-2
-1
0-