U20-3, U25-3 WSM General
I-4
c. Preparation for disassembly
(1) Cleaning
Remove mud and dirt from the body before disassembly.
(2) Acceptance inspection
The machine must be checked before it is disassembled to record existing conditions, such as those
listed below.
Model, serial number, and hourmeter reading
• Reason for repair and repair history
• Element stains
• Fuel and oil condition
• Parts damage *(Take photographs if necessary.)
(3) Equipment and tools
prepare equipment, tools, cranes and parts storage racks as required.
d. Precautions for disassembly and reassembly
(1) Disassembly
1. Follow the specified disassembly procedures.
2. Make alignment marks to insure correct reassembly.
3. Arrange disassembled parts in an orderly way, and attach identification tags or put marks if
needed.
(2) Reassembly
1. Clean all parts before assembly. Repair any scratches or dents. Take special precautions against
dirt and dust.
2. Parts with rust-preventive coatings must be assembles only after removing the coating.
3. Separated parts must be correctly reassembled using alignment marks.
4. As a rule, use a press to reassembled bearings, bushing and oil seals. Use pads when using a
hammer.
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