SHOP MANUAL MT26/31 - 12.2004SHOP MANUAL MT26/31 - 12.2004
GENERAL
CH 0 PAGE 16 CH 0 PAGE 17
GENERAL
SHOP MANUAL MT26/31 - 12.2004SHOP MANUAL MT26/31 - 12.2004
GENERAL
CH 0 PAGE 16 CH 0 PAGE 17
GENERAL
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 bear-
ings).
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.
Assembly
Thoroughly clean all parts before assembly. Wash clean those parts relating to the drive line. Also, check for
scratches and nicks on the surfaces of the parts and repair, if any. Wash new parts to remove rust preventives, if
coated, before assembly. Use triclorethylene or diesel fuel.
Employ a press or a driving tool when assembling bearings, bushings and oil seals. When installing a
bearing, pay attention to keep the marking on the bearing facing outward, unless it is necessary to install other-
wise because of the construction
(this permits easy identifying of the bearing installed).
Be sure to positively lock bolts and nuts which are usually invisible from the outside or used for some
important parts that require locking, by the use of wires, cotter pins or lockwasher.
Be sure to tighten each bolt to the specified torque with a suitable torque wrench. Apply an even tightening
force to the bolts by screwing them alternately or in a crisscross fashion.
0.2.19 Precautions for Disassembly and Assem-
bly Operations
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