3Com Caterpillar Commercial Diesel Engine SEBU6251-06 - Manual (Page 12)

12
Maintenance Section
Lubricant Specifications
NOTICE
Failure to follow these oil recommendations can cause
shortened engine service life due to deposits and/or
excessive wear.
Total Base Number (TBN) and Fuel
Sulfur Levels for Precombustion
Chamber (PC) Diesel Engines
The TBN for a new oil depends on the fuel sulfur
level of the fuel that is used. The minimum TBN of
the oil that is used in PC engines must be 20 times
the fuel sulfur level. The TBN is defined in “ASTM
D2896”. Regardless of fuel sulfur level, the minimum
TBN of new oil is five. Refer to illustration 4.
g00274867
Illustration 4
(Y) The TBN that is shown by “ASTM D2896”
(X) Percentages of fuel sulfur by weight
(1) TBN of new oil
(2) Change the oil when the TBN deteriorates to 50 percent of
the original TBN.
Whenever the fuel sulfur exceeds 1.5 percent, do
the following tasks.
• Choose an oil with the highest TBN that meets
one of these classifications: EMA LRG-1, API CF,
API CF-4, API CG-4, and API CH-4.
• Shorten the oil change interval if the oil analysis
dictates.
Excessive piston deposits can be produced by an
oil with a high TBN. These deposits can lead to a
loss of control of the oil consumption and to the
polishing of the cylinder bore.
NOTICE
Operating PC engines at fuel sulfur levels over 1.0
percent may require shortened oil change intervals to
maintain adequate wear protection.
Lubricant Viscosity Recommendations
for Precombustion Chamber (PC) Diesel
Engines
The proper SAE viscosity grade of oil is determined
by the minimum ambient temperature during
cold engine start-up, and the maximum ambient
temperature during engine operation.
Refer to Table 4 (minimum temperature) in order
to determine the required oil viscosity for starting
a cold engine.
Refer to Table 4 (maximum temperature) in order to
select the oil viscosity for engine operation at the
highest ambient temperature that is anticipated.
Generally, use the highest oil viscosity that
is available to meet the requirement for the
temperature at start-up.
Table 4
Engine Oil Viscosity
Ambient Temperature Caterpillar DEO
Multigrade
EMA LRG-1
API CH-4
API CG-4
API CF-4 and
API CF
Viscosity Grade
Minimum Maximum
SAE 0W20
−
40

C (
−
40

F) 10

C (50

F)
SAE 0W30
−
40

C (
−
40

F) 30

C (86

F)
SAE 0W40
−
40

C (
−
40

F) 40

C (104

F)
SAE 5W30 −
30

C (
−
22

F) 30

C (86

F)
SAE 5W40 −
30

C (
−
22

F) 40

C (104

F)
SAE 10W30
−
20

C (
−
4

F) 40

C (104

F)
SAE 15W40
−
15

C (5

F) 50

C (122

F)
SAE 30 0

C (32

F) 40

C (104

F)
SAE 40 5

C (41

F) 50

C (122

F)
i01098470
Marine Transmission Oil
SMCS Code: 3080; 3300
Caterpillar Transmission/Drive Train Oil (TDTO)
is balanced in order to give maximum frictional
material service life in Caterpillar transmissions.
TDTO exceeds the requirements for the Caterpillar
TO-4 oil specification which includes the frictional
requirements and gear wear requirements. TDTO
is offered in different lubricant viscosity grades
for maximum service life of components at high
ambient temperatures and heavy duty cycles.