4.
DISASSEMBLY
and
REASSEMBLY
4-1
PREPARATION
and
SUGGESTIONS
1) When disassembling the engine, memorize the locations
of
individual parts
so
as
to
be able to reassemble them correct-
ly. Tag parts if there
is
a possibility
of
confusion.
2)
Prepare several boxes
to
keep parts belonging to certain groups together.
3)
Group those parts related each other, tentatively assembling where they belong, immediately after removing, in order
to prevent missing and misplacing.
4) Handle the disassembled parts carefully and wash them in kerosene.
5)
Use the correct tools in the correct way.
6)
Standard tools required for disassembling and reassembling:
a) Work table
b) Washing pan
c) Disassembling tools
d) Washing oil (kerosene or gasoline),
2
cycle-oil
e) Emery paper, cloth
7)
Before starting
to
disassemble the engine, drain fuel.
8)
Tighten the screws of the cylinder, crankcase, connecting rod, spark plug, and flywheel
to
the specified torque values.
9) Use new packings and gaskets in reassembly.
10)
Immediately before assembling parts, wash them in fresh gasoline or kerosene and blow them dry.
1 1) Apply
2
cycle-oil on rotating and sliding
parts.
12)
Take care not
to
contaminate the parts by dust during assembling.
13)
Tighten bolts, nuts and screws with proper torque according
to
the
their sizes.
If
small screws are tightened too tight,
they may get broken.
14) After completely assembling the engine; turn it by hand and check if there
is
any abnormality or loose members.
,-
4-2
SPECIAL
TOOLS
(Fig.
1)
Fig.
1
-4-
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