Part V Disassembly & Repair; Precautions On Disassembly/Assembly; Disassembly; Assembly - LONCIN LC2V80FD Maintenance Manual

Chapter V Disassembly & Repair

5-1 Precautions on disassembly/assembly

5-1-1 Disassembly

1. Get familiar with the constitution and operating principle of the machine prior to disassembly, which is the
precondition for correct disassembly.
2. Not disassemble those without the need. Blind disassembly will not only increase workload of repair but also
damage the original good coordinating relation and precision among parts so as to cause new hidden faults.
3. Use proper disassembly tool and adopt the correct disassembly method. It is prohibited to tap strongly during
disassembly so as to avoid deformation and damage of parts. To enhance repair efficiency, it prefers to use
special disassembly tools.
4. The disassembly must be gradually conducted from the outside to the inside. Generally, the disassembly order
is "overall machine, assembly, components and then parts".
5. To assemble the machine smoothly after repair, the following shall be noted during disassembly:
1) Check and make marks (such as scribing, arrow and text on some parts). For parts without marks, make signs
on non-operating sides so as to re-install them correctly.
2) Place parts reasonably and store them in categories. Parts of the same assembly or components shall be stored
together. Parts (e.g. gasket) that are easily to be deformed or lost shall be stored separately.

5-1-2 Assembly

1. The assembly site shall be clean.
2. Prepare proper assembly tools and devices.
3. Parts must be cleaned and dusts, soil, metallic debris, carbon deposition, grease stain and other impurities shall
be removed from the surface. Clean and blow it with compression air, cleaning agent, etc.
4. As per the opposite order of disassembly, i.e. assemble as per the order of "from inside to outside and from
main part to auxiliary part" and "parts, components, assembly, and then overall machine".
5. Note to check part marks and assembly signs during assembly so as to avoid neglected assembly.
6. When assembling fastening parts, fasten it from center to both sides and diagonal crossing direction to fasten it
for several times. Then fasten it in place with torque wrench.
7. Timely replace each sealing gasket during assembly.
8. Conduct the test running for the machine after the overall machine is assembled, adjusted and checked without
errors.
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