Case W9 - Page 11

FUEL
Diesel Fuel
Recommended Fuel
Case diesel engines are designed to operate most efficiently with No. 2 diesel fuel.
Most well known refiners and distributors market a good grade of diesel fuel and there should
be no difficulty in obtaining it .
Do not confuse No. 2 diesel fuel with No. 2 furnace oil which is similar but does not
always meet specifications for diesel engines .
CAUTION: No. 1 diesel fuel is not recommended for normal operating conditions . This
is a lighter fuel which can result in loss of engine power, increased fuel consumption, and
lessened injection pump life.
Fuel Specifications
There can be considerable variation in diesel fuels marketed as No. 2. The American
Society for Testing Materials (ASTM) has established a widely recognized specification,
ASTM Designation D975, which is used in the United States, Canada, and many other areas
of the world. Any fuel purchased for use in a Case engine should meet this ASTM specification.
However, there is no world-wide standardization of diesel fuels and ASTM specifications
ar e not used everywhere. Following are the most important specifications of an acceptable
diesel fuel:
Pour point, maximum
Cetane number, minimum
Sulphur, by weight, ma ximum
Water and sediment, by volume, maximum
Ash, by weight, maximum .....
Carbon residue on 10 %, maximum
Distillation, 90% point
End point . ......... .. .
Flash point, minimum .... . .. .
Viscosity, centistokes at 100° F.
Saybolt Universal Seconds at 100° F .
Corrosion, copper strip, 3 hours at 212° F.
API gravity, minimum .. .. . . ...... . . .
6
10° F. below lowest atmospheric temperature
at w hich engine must start and oper a te.
. 40 (45-55 for w inter or high altitudes).
. . . . . . . . . . . .50 of 1%
.05 of 1%
. 01 of 1%
.20 of 1%
. . 540° - 625°
. . . . . . . 675°
. . 125°
or legal
2.0 - 4.3
. . . • • 32 - 40
No. 3
ASTM
. . . . .. . .. .• 30
7003 12