SHOP MANUAL
Engine
Ch 1 page 48
Temperature dependence of diesel fuel
At temperatures lower than those specified for the diesel fuel, paraf-
fin wax may precipitate from the fuel and block filters and pipes. The
engine can then loose power or stop.
The diesel fuel is adapted for use in the specific climate of each
country. If a vehicle or an engine is to be operated in a temperature
zone with lower temperature than normal, first identify the tempera-
ture properties of the fuel concerned.
The properties of the fuel when cold can be improved by adopting
one of the following measures before the temperature drops:
- If the fuel concerned cannot cope with the expected
temperatures, and diesel fuel is not available with the
correct temperature properties, we recommend that
an electric fuel heater is installed as a preventative
measure.
- The low temperature properties of diesel fuel may
be improved by adding kerosene as a preventative
measure. A maximum of 20% may be added. When
refuelling, the kerosene should be added first, so that
it mixes thoroughly with the diesel fuel.
- To prevent water in the fuel from freezing and
forming ice, a maximum of 0.5-2% alcohol
(isopropanol) may be added.
Drain fuel tanks and drain or change fuel filters
regularly.
Feed pump renewal
1
Clean the outside of the feed pump.
Remove the suction and pressure
lines from the feed pump.
Fit protective plugs.
2
Unscrew the bolts and remove the
feed pump.
3
Place a new O-ring onto the feed
pump and ubricate with O-ring
grease.
4
Fit the feed pump.
5
Connect the suction and pressure
pipes.
6
Bleed the fuel system; refer to Bleed-
ing the fuel system.
7
Start the engine and check for leaks.
It is not permitted to mix kerosene with diesel fuel that is al-
ready adapted for the climate concerned. This can damage the
PDE injectors. All use of parafn other than kerosene is forbid-
den, as it causes engine damage.
It is not permissible to mix petrol with diesel fuel. In the long
term, petrol may cause wear to the PDE injectors and it may
also cause damage to the engine.
WARNING
CAUTION
It is prohibited to use kerosene in engine fuel in some coun-
tries.
NOTE
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