Elongation of Counterbore
CAUSES: Rotating contact with the
bushing end in pitch extended Sealed
Track (see Sealed Track bushing counter-
bore wear).
ACCELERATORS: None — a direct
function of pitch extension.
EFFECT: Reduces re-sealability of coun-
terbore even with new seals in Sealed
Track. Link is less rebuildable.
REMEDIES: Turn pins and bushings in
Sealed Track at service limit.
Depth Wear in Counterbore
CAUSES: Rotative contact between
Sealed Track seals or bushing end with
bottom of counterbore (See Sealed Track
Bushing End Wear).
ACCELERATORS: Abrasiveness, side
hill loads and turning, side thrust impact
and too wide shoes.
EFFECT: Same as Counterbore Elonga-
tion wear.
REMEDIES: Reduce or eliminate control-
lable accelerators and install new seals at
pin and bushing turn time.
Pin Boss Tip Worn
CAUSES: Sliding and roller contact with
roller flange tops (see roller flange wear).
ACCELERATORS: Nonuniform front to
rear roller wear when link is not 100 per-
cent worn.
EFFECT: Loss of pin retention and reduced
rail rebuildability.
REMEDIES: Swap rollers to balance wear
effect and rebuild rail, rollers as required.
Face Wear
CAUSES: Rotative contact between over-
lapping link faces following Sealed Track
link counterbore depth wear, seal wear and
bushing end wear, all which allow end
play.
ACCELERATORS: Same as “Depth Wear
in Counterbore.”
EFFECT: Reduces wear life of original
and/or rebuilt link and reduces rebuildabil-
ity. (Also see Uneven Wear On Rail Top,
position 1 & 3).
REMEDIES: Reduce or eliminate acceler-
ators. Sealed and Lubricated Track will
have very little face wear due to no coun-
terbore or bushing end wear keeping link
faces separated.
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General Information
LINKS