Hitachi Zaxis 200 Workshop Manual page 39

GENERAL / Precautions for Disassembling and Assembling
PRECAUTIONS FOR
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
contaminated during
resulting in damage to machine components, as
well as decreased efficiency in service work.
•
Inspect the Machine
Be sure to thoroughly
disassem-bling/assembling procedures beforehand,
to help avoid incorrect
components as well as personal injury.
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).
• Clogging of filters and oil, water or air leaks, if
any.
• Capacities and condition of lubricants.
• Loose or damaged parts.
•
Prepare and Clean Tools and Disassembly Area
Prepare the necessary tools to be used and the
area for disassembling work.
DISASSEMBLING
components to be
disassembling/assembling,
understand all
disassembling of
W1-1-1
•
Precautions for Disassembling
• To prevent dirt from entering, cap or plug the
removed pipes.
• Before disassembling, clean the exterior of the
components and place on a work bench.
• Before disassembling, drain gear oil from the
reduction 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
attempt 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
disassembled parts for abnormal wear, sticking,
or other damage.
• Measure and record the degree of wear and
clearances.