A-21A-21
TX / TXH / TXB 180S - 400L (4/07)TX / TXH / TXB 180S - 400L (4/07)
cyclic stress necessary)cyclic stress necessary)
from hostile environment byfrom hostile environment by
lubricating more frequentlylubricating more frequently
5. Cracked Plates (Corrosion Fatigue)5. Cracked Plates (Corrosion Fatigue)
Perpendicular to Pitch Line, plus rustPerpendicular to Pitch Line, plus rust
or other evidence of chemicalor other evidence of chemical
corrosioncorrosion
Corrosive environment andCorrosive environment and
cyclic motion (chain undercyclic motion (chain under
cyclic operation)cyclic operation)
Replace Replace chain chain and and protectprotect
from hostile environment byfrom hostile environment by
lubricating more frequentlylubricating more frequently
AAppppeeaarraanncce e aanndd//oor r SSyymmppttoomm PPrroobbaabblle e CCaauussee CCoorrrreeccttiioonn
6. Tight Joints6. Tight Joints
Dirt or foreign substanceDirt or foreign substance
packed in jointspacked in joints
Corrosion and rustCorrosion and rust
Bent pinsBent pins
Replace chainReplace chain
Replace chainReplace chain
Clean and relubeClean and relube
7. Enlarged Holes7. Enlarged Holes
High overload, dropping andHigh overload, dropping and
catching loadcatching load
Replace chain and correctReplace chain and correct
cause of overloadcause of overload
8. Worn Contour (Edge Wear)8. Worn Contour (Edge Wear)
5% of H5% of H
HH
Normal wear on sheave bearingNormal wear on sheave bearing
areaarea
Abnormal wear, Abnormal wear, rubbing onrubbing on
rollerroller
Replace chain and correctReplace chain and correct
cause of overloadcause of overload
Check chain roller bearingCheck chain roller bearing
Replace chain when wearReplace chain when wear
reaches 5% of H.reaches 5% of H.
9. Worn Surfaces on Outside Links9. Worn Surfaces on Outside Links
or Pin Headsor Pin Heads
Misalignment, rubbing on rollerMisalignment, rubbing on roller
flangesflanges
Check alignment ofCheck alignment of
anchors, chain rollersanchors, chain rollers
d h i ll id h i ll i
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