KAMAZ 5490 Operation Manual page 231

7 Guidelines
7.1 For securing continuous working capacity of
the heater it's recommended to turn on the heater briefly
for about five minutes once a month during the whole year
(including a warm season of the year). The turning on
must be carried out at the ambient air temperature near the
control panel and the heat sensor below +30 °С. Thus, the
sticking of the movable parts of the fuel pump can be
eliminated (it can arise because of the low-quality fuel).
7.2 Reliable work of the heater depends on the
fuel used in relation with the ambient air temperature.
Recommended types of fuel are given in chart 2.
The ambient air Fuel or mixture type
С
0
temperature,
Up to 0 Diesel fuel L-0,2-40 or L-02-62 State
Standard Specification 305-82
From 0 till Diesel fuel
minus 5 Standard Specification 305-82
Mixture of diesel fuel З-0,2 minus 45 State
From minus 5
till minus 20 Standard Specification 305-82 (70 %)
and kerosene
Technical Specifications 38.401-58-10-
90 (30 %)
Diesel
Below
minus 20 Specification 305-82 or mixture of diesel
fuel З-0,2 minus 45 State Standard
Specification 305-82(50 %) and kerosene
КО-25 or КО-20 Technical Specifications
38.401-58-10-90 (50 %)
Chart 2
З-0,2 minus 45 State
КО-25 or КО-20
fuel А-0,4
State Standard
7.3 In the case of untimely change for winter fuel
the heater may not start or may turn off during the
operation.
The reason of such failures is the blocking of the
fuel pump and possibly the hose pipes by paraffin that is
generated in the diesel fuel that doesn't fit the arisen
minus temperature of the surrounding environment.
To eliminate the appeared failure it's necessary:
- to change the fuel in the fuel tank in accordance
with the guidelines given in chart 2;
- to disconnect the hose pipe from the heater and
put its end into a transparent container (a jar);
- to turn on the heater and try to pump through the
fuel system. If the positive results are obtained, to
connect the hose pipe to the heater and turn it on again;
- if it's not possible to pump through the fuel
system, it's necessary to dismantle it, put it into a warm
place and keep it there (warm it) and then pump it
through with the changed fuel. Then to mount the fuel
system on the motor vehicle and start the heater.
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