16
ALIGNMENT
General Information
Lateral Displacement
When viewed from top, idler is parallel to,
but moved toward or away with respect to
the tractor and roller frame.
CAUSE: improper shimming
EFFECT: wears inner or outer idler flanges
and inner rail sides selectively and may
affect front roller(s) if severe
REMEDY: correct shimming
Twist — Tilt
When viewed from front, idler tilts out of
vertical plane.
CAUSE: bent idler support box frame
(inner and/or outer up and/or down with
respect to each other)
EFFECT: same as toe-in or toe-out
REMEDY: same as toe-in or toe-out
Sprocket
Toe-in, Toe-out
When viewed from top, sprocket not
parallel to center line of roller frame.
CAUSE: sprocket shaft bent forwards or
backwards
EFFECT: wears both inner link sides and
both sides of segments
REMEDY: straighten or replace sprocket
shaft
Twist
When viewed from rear, sprocket is leaned
or tilted in or out with respect to the roller
frame.
CAUSE: sprocket shaft bent up or down
EFFECT: inboard or outboard sprocket
sides and rail insides worn selectively,
may affect rear roller flanges
REMEDY: straighten sprocket shaft