GENERAL INSTRUCTIONS
SHOP MANUAL
Ch 0 page 37
Disassembly
• Before attempting to disassemble, determine the cause of the trouble by systematically checking and
analysing the symptoms. Needless disassembly will not only hinder troubleshooting, but will also result in
losses through unnecessary replacement of parts and man-hour costs.
• During disassembly, carefully check every sliding part for any sign of seizing, interference or contact,
since these may reveal hidden faults which could be the actual cause of the trouble.
• Unless major disassembly, based on definite reason is to be made, the related parts should be first briefly
inspected, and disassembly started after confidence in the operation is established.
• Thoroughly clean the part of the machine to be disassembled, before attempting to disassemble.
• Proceed with the disassembly by confirming the fitting conditions of the relative parts; their position fore-
and-aft, left-and-right and upper-and-lower, and the proper sequence of their removal.
• When draining lubricating oils, take note of their viscosity, color and state of contamination. Observation
of used oils often provides clues to the wear condition of the lubricated parts (specially whit regard to
gears and bearings).
• Put match marks across mating joints where required before separating parts. The parts should be clearly
marked to prevent confusion at the time of assembly.
• For disassembly of certain parts, only use the special tools prescribed for this purpose.
• When a part, after removal of fastening nuts and bolts, is still found to be unremovable, never force the
parts; but carefully check for the cause of the tightness.
• When looseness exists between force-fitted or taper-fitted, parts, check both of the mating surfaces for
damage or wear. Repair or replace the part(s) if necessary.
• When removing a control-link assembly, be careful to maintain the original adjustment of the length of the
rods unless any readjustment is necessary. Check the original length of each rod and record it before
removal of the link assembly if it is necessary to remove the rod-end for disassembly.
• Wash disassembled parts clean, neatly arrange the parts for each assembly, and keep in storage, free
from dust and dirt. Use two vessels filled with detergent oil, one for washing dirty parts and two for rinsing
them.
• Keep each set of shims stacked in its original arrangement so that the same clearances as before
disassembly can be obtained when the machine is reassembled.
Precautions for disassembly and assembly
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