3Com Caterpillar Commercial Diesel Engine SEBU6251-06 - Manual (Page 13)

13
Maintenance Section
Lubricant Specifications
For maximum transmission service life and
performance, Caterpillar recommends Caterpillar
Transmission/Drive Train Oil (TDTO).
Table 5
Caterpillar TDTO
Lubricant Viscosities For Operating Temperatures
Cooling of
Transmission
Oil Viscosities
Minimum
Temperature
Maximum
Temperature
SAE 30
−
15

C (5

F) 80

C (176

F)
Raw/Seawater
SAE 50 −
5

C (23

F) 95

C (203

F)
Jacket Water SAE 50
−
5

C (23

F) 95

C (203

F)
Contact your Caterpillar dealer for part numbers
and for sizes of available containers.
NOTICE
This oil is formulated for transmissions and drive trains
only, and should not be used in engines. Shortened
engine life will result.
NOTICE
Caterpillar Gear Oil (GO) is not the same as
Caterpillar Transmission/Drive Train Oil, and does
not meet Caterpillar’s specifications for TO-4 oil.
Caterpillar GO or commercial gear oils should not be
used in compartments which specify TO-4 oil.
Caterpillar Transmission/Drive
Train Oils
If Caterpillar Transmission/Drive Train Oil is not
used, commercial oils meeting the Caterpillar TO-4
specification must be used in Caterpillar marine
transmissions. Use TO-4 Specification Oils that are
single grade only.
Commercial Marine Transmissions
For marine transmissions which are not
manufactured by Caterpillar, refer to the lubrication
recommendation of the OEM for the marine
transmission or the vessel.
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Synthetic Base Stock Oils
SMCS Code: 1300; 1348; 7581
Synthetic base oils are acceptable for use
in Caterpillar engines if these oils meet the
performance requirements that are specified for the
engine compartment.
Synthetic base oils generally perform better than
conventional oils in the following two areas:
• Synthetic base oils have improved flow at low
temperatures especially in arctic conditions.
• Synthetic base oils have improved oxidation
stability especially at high operating temperatures.
Some synthetic base oils have performance
characteristics that enhance the service life of the
oil. However, Caterpillar does not recommend the
automatic extension of oil change intervals for
any type of oil. Oil change intervals for Caterpillar
engines can only be adjusted after an oil analysis
program that contains the following tests: oil
condition and wear metal analysis (Caterpillar’s
S·O·S oil analysis), trend analysis, fuel consumption,
and oil consumption.
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Re-refined Base Stock Oils
SMCS Code: 1300; 1348; 7581
Re-refined base stock oils are acceptable for
use in Caterpillar engines if these oils meet the
performance requirements that are specified by
Caterpillar. Re-refined base stock oils can be used
exclusively in finished oil or in a combination with
new base stock oils. The US military specifications
and the specifications of other heavy equipment
manufacturers also allow the use of re-refined base
stock oils that meet the same criteria.
The process that is used to make re-refined base
stock oil should adequately remove all wear metals
that are in the used oil and all additives that are
in the used oil. The process that is used to make
re-refined base stock oil generally involves the
processes of vacuum distillation and hydrotreating
the used oil. Filtering is inadequate for the
production of high quality re-refined base stock oils
from used oil.