Doosan 5001, Instructions Manual

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SP000016 General Maintenance Procedures
Page 12
CLEANING AND INSPECTION
General Guidelines
All parts must be clean to permit an effective inspection. During
assembly, it is very important that no dirt or foreign material
enters unit being assembled. Even minute particles can cause
malfunction of close fitting parts such as thrust bearing, matched
parts, etc.
1. Clean all metal parts thoroughly using a suitable cleaning
fluid. It is recommended that parts be immersed in
cleaning fluid and moved up and down slowly until all oils,
lubricants, and/or foreign materials are dissolved and parts
are thoroughly clean.
2. For bearings that can be removed, soak them in a suitable
cleaning fluid for a minute or two, then remove bearings
from cleaning fluid and strike flat against a block of wood to
dislodge solidified particles of lubricant. Immerse again in
cleaning fluid to flush out particles. Repeat above
operation until bearings are thoroughly clean. To dry
bearings, use moisture-free compressed air. Be careful to
direct air stream across bearing to avoid spinning bearings
that are not lubricated. DO NOT SPIN BEARINGS WHEN
DRYING; bearings may be rotated slowly by hand to
facilitate drying process.
3. Carefully inspect all bearing rollers, cages and cups for
wear, chipping or nicks to determine condition. Do not
replace a bearing cone or cup individually without
replacing mating cup or cone at the same time. After
inspection, dip bearings in light weight oil and wrap in clean
lintless cloth or paper to protect them until installation.
For those bearings that are to be inspected in place;
inspect bearings for roughness of rotation, scoring, pitting,
cracked or chipped races. If any of these defects are found,
replace bearings. Also, inspect defective bearing housing
and/or shaft for grooved, galled or burred conditions that
indicate bearing has been turning in its housing or on its
shaft.
4. It is more economical to replace oil seals, O-rings, sealing
rings, gaskets and retaining rings when unit is
disassembled than waiting for premature failures; refer to
latest Micro Fiche and/or Parts Book for replacement
items. Be extremely careful when installing sealing
members, to avoid cutting or scratching.
WARNING
Care should be exercised to avoid inhalation of vapors,
exposure to skin and creating fire hazards when using
solvent type cleaners.