GENERAL INFORMATION / Precautions for Disassembling and Assembling
W1-1-1
PRECAUTIONS FOR DISASSEMBLING
AND ASSEMBLING
Precautions for Disassembling and Assembling
•
Clean the Machine
Thoroughly wash the machine before bringing it into
the shop. Bringing a dirty machine into the shop may
cause machine components to be contaminated dur-
ing disassembling/assembling, resulting in damage
to machine components, as well as decreased effi-
ciency in service work.
•
Inspect the Machine
Be sure to thoroughly understand all disassem-
bling/assembling procedures beforehand, to help
avoid incorrect disassembling of components as well
as purchasing unnecessary parts.
Check and record the items listed below to prevent
problems from occurring in the future.
•
The machine model, machine serial number, and
hour meter reading.
•
Reason for disassembly (symptoms, failed parts,
•
and causes).
•
Contamination or clogging of filters and oil, water
or air leaks, if any.
•
Capacities and condition of lubricants.
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Loose or damaged parts.
•
Prepare and Clean Tools and Disassembly Area
Prepare the necessary tools to be used and the area
for disassembling work or storing disassembled
parts.
•
Precautions for Disassembling
•
To prevent dirt contamination, cap or plug all re-
moved pipes.
•
Before disassembling, clean the exterior of the
components and place on a work bench.
•
Before disassembling, drain gear oil from the re-
duction gear.
•
Be sure to provide appropriate containers for
draining fluids.
•
Use matching marks for easier reassembling.
•
Be sure to use the specified special tools, when
instructed.
•
If a part or component cannot be removed after
removing its securing nuts and bolts, do not at-
tempt to remove it forcibly. Find the cause(s), then
take the appropriate measures to remove it.
•
Orderly arrange disassembled parts. Mark and
tag them as necessary.
•
Store common parts, such as bolts and nuts with
reference to where they are to be used and in a
manner that will prevent loss.
•
Inspect the contact or sliding surfaces of disas-
sembled parts for abnormal wear, sticking, or
other damage.
•
Measure and record the degree of wear and
clearances.
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Precautions for Assembling
•
Be sure to clean all parts and inspect them for any
damage. If any damage is found, repair or replace
it.
•
Dirt or debris on the contact or sliding surfaces
may shorten the service life of the machine.
•
Take care not to contaminate any contact or slid-
ing surfaces.
•
Be sure to replace O-rings, backup rings, and oil
seals with new ones once they are disassembled.
Apply a film of grease before installing.
•
Be sure that liquid-gasket-applied surfaces are
clean and dry.
•
If an anti-corrosive agent has been used on a new
part, be sure to thoroughly clean the part to re-
move the agent.
•
Utilize matching marks when assembling.
•
Be sure to use the designated tools to assemble
bearings, bushings and oil seals.
•
Keep a record of the number of tools used for dis-
assembly/assembly. After assembling is complete,
count the number of tools, so as to make sure that
no tools are missing.