Forward Drive Side Tip Wear
CAUSES: Bushing sliding interference
due to mislocation of bushing in very
severe packing with Sealed and Lubricated
Track and Sealed Track with little internal
wear. Occurs at top of sprocket in forward
(exit) and reverse (entry) motion. Usually
less severe than but always in presence of
“RDS Tip Wear” described above.
Accompanied by bushing FDS pocket
wear.
ACCELERATORS: Same as “Vertical
Position” and “FDS and RDS Bushing
Wear” except degree of packing is more
severe.
EFFECTS: None on sprocket itself. Does
not affect sprocket internal wear life or
reusability except in the very severe cases.
REMEDIES: Same as for “RDS Sprocket
Tip Wear” described above where cause is
packing. Do not change or replace
segments based on tip wear. Use sprocket
re-use gauge to determine reusability at
bushing turn or replacement.
Sprocket Side Wear And Corner
Wear or Gouging
(Inner and/or Outer)
CAUSES: (1) If inner or outer sides are
over 360° of sprocket, principal causes are
snaky Sealed Track and/or loss of guiding
guard capability with Sealed and Lubri-
cated Track or Sealed Track resulting in
interference with inner link sides. (2) If
limited to inner or outer, or not uniform
over 360° of sprocket then principal cause
is probably misalignment of sprocket and/or
roller frame.
ACCELERATORS: Uneven terrain and
side hill; turning, too wide shoes, snakiness.
EFFECTS: Principal adverse effect is on
link (see “Link Wear Patterns”) severe
cases reduce contact areas of sprocket-
bushing fit may accelerate bushing wear.
Also may cause an off-center bushing
wear pattern if the cause is alignment.
REMEDIES: (1) If caused by snaky Sealed
Track pins and bushings should be turned
or replaced but main consideration is track,
not sprocket wear. (2) If caused by worn
guiding guards replace wear strips (3) If
caused by misalignment correct after care-
ful measurement.
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General Information
SPROCKETS