Sealed and Lubricated Track
Bushing Wear
Measurement Technique
The track bushing is the most important
component in the undercarriage to measure
and interpret accurately.
To do this, three measurement methods
are available, each using tools provided in
the CTS tool kit.
You should refer to individual model
family sections for specific recommenda-
tion on which method to use because the
second method described here, using
depth gauge will record vertical position
wear only.
1. Caliper Method
This method gives a direct reading of
bushing diameter. With careful cleaning
and proper technique it can yield the most
accuracy, but is also the most susceptible
to error if not properly measured. The
most common errors using the caliper
method are:
(A) Calipers Squeezed Too Tight —
Calipers that are over tightened can be
spread like a spring and will give too small
of a reading.
(B) Calipers at Wrong Angle to Bushing
Axis — Calipers that are set at an angle to the
bushing will give an oversize measurement.
(C) Calipers Not Slid Back and Forth
Across Position to be Measured —
Calipers that are not passed back and
forth over the maximum diameter of the
bushing position being measured will give
an undersize reading.
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SEALED & LUBRICATED TRACK PINS & BUSHINGS
General Information