Case 521E, Service Manual

1002-6

Bur  5-10840

Issued 2-08

Printed in U.S.A.

DIESEL FUEL SYSTEM

Use No. 2 diesel fuel in the engine of this machine.
The use of other fuels can cause the loss of engine
power and high fuel consumption. 

In very cold temperatures, a mixture of No. 1 and No.
2 diesel fuels is temporarily permitted. See the
following Note.

NOTE:

See your fuel dealer for winter fuel

requirements in your area. If the temperature of the
fuel lowers below the cloud point (wax appearance
point), wax crystals in the fuel will restrict the fuel
filter and cause the engine to lose power or not start. 

The diesel fuel used in this machine must meet the
specifications as shown below in, “Specifications for
Acceptable No. 2 Diesel Fuel”, or Specification
(ASTM-D-975) of the American Society for Testing
and Materials.

Fuel Storage

If you keep fuel in storage for a period of time, you
can get foreign material or water in the fuel storage
tank. Many engine problems are caused by water in
the fuel. 

Keep the fuel storage tank outside and keep the fuel
as cool as possible. Remove water from the storage
container at regular periods of time. 

Fill the fuel tank at the end of the daily operating
period to prevent condensation in the fuel tank.

Specifications for Acceptable No. 2 Diesel Fuel 

API gravity, minimum  .............................................................................................................................................  34
Flash point, minimum  ............................................................................................................................60°C (140°F)
Cloud point (wax appearance point), maximum  ...........................................................-20°C (-5°F) See Note above
Pour point, maximum ..................................................................................................-26°C (-15°F) See Note above
Distillation temperature, 90% point  ................................................................................282 to 338°C (540 to 640°F)
Viscosity, at 38°C (100°F) 

Centistokes .........................................................................................................................................  2.0 to 4.3

Cetane number, minimum  ..........................................................................  43 (45 to 55 for winter or high altitudes)
Water and sediment, by volume, maximum ..................................................................................................... 0.05%