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TOTAL LIFE SCALE
Management & Merchandising
The Total Life Scale
A Total Life Scale provides a simple,
convenient, way of expressing the measured
and calculated values from the CTS inspec-
tion report and subsequent recommen-
dations in pictorial form. More than one
Total Life Scale may be used to compose
two or more of the following for as many
undercarriage components as desired:
1. Sealed Track inspection, wear life and
maintenance rebuild history(s).
2. Sealed Track inspection, wear life and
maintenance rebuild projection(s).
3. Sealed and Lubricated Track inspec-
tion, wear life and maintenance/rebuild
history(s).
4. Sealed and Lubricated Track inspec-
tion, wear life and maintenance/rebuild
projection(s).
5. Competitive undercarriage inspection,
wear life and maintenance/rebuild
history(s) from records.
A combination of history plus projection
is the most common expected use of the
Total Life Scale.
In order to provide as much information
possible in a limited space, a set of sym-
bols has been developed. They are listed
here for reference as used in the following
examples:
Measurement — Inspection
Symbols
I — percent Sealed Track Internal
pin and bushing percent worn
to Service Limit (Use symbol
above Total Life Scale line)
E — percent Sealed Track External
bushing percent worn to Ser-
vice Limit
L — percent Track Links percent
worn to Service Limit
R — percent Track Roller percent
worn to Service Limit
CR — percent Carrier Roller percent
worn to Service Limit
SH — percent Track Shoe percent
worn to Service Limit
I — percent Idler(s) percent worn
to Service Limit (Use symbol
below Total Life Scale line)
B — percent Sealed and Lubricated
Track Bushing percent worn to
Service Limit
Wear Life Potential Symbols
IS &ID — Sealed Track Internal wear
life potential to Service and
Destruction Limits (Use sym-
bol above Total Life Scale
line)
ES &ED — Sealed Track External wear
life potential to Service and
Destruction Limits
BS &BD — Sealed and Lubricated Track
Bushing wear life potential to
Service and Destruction Limits
P&BD — Sealed Track — Pins and
Bushings to Destruction Point
LS &LD — Track Link wear life potential
to Service and Destruction
Limits
RS &RD — Track Roller wear life poten-
tial to Service and Destruction
Limits
CRS — Carrier Roller wear life poten-
&CRD tial to Service and Destruction
Limits
SHS — Track Shoe Grouser wear
&SHD life potential to Service and
Destruction Limits
SG — Single Grouser
DG — Double Grouser
ES — Extreme Service
IS &ID — Idler tread wear life potential
to Service and Destruction
Limits (when used on bottom)