KAMAZ 5490 Operation Manual page 100

Oil heating in the steering system
It is necessary to heat the oil in the steering sys-
tem after engine cranking, prior to vehicle motion start,
to exclude the damage and excessive wear of parts of
steering mechanism and hydraulic power steering pump.
Engine operating time necessary for heating of oil
in the steering system versus the temperature of ambient
air is indicated in Table «Engine operating time neces-
sary for oil heating in the steering system versus ambient
air temperature».
Engine operating time
necessary for oil heating in the steering system versus
ambient air temperature
Lower than
Ambient air
minus
temperature
25 °С
Not less
Engine is
than 5
in operation
minutes
Attention!
It is PROHIBITED to rotate the steering wheel,
before the oil in the steering system is warmed up!
Lower than Lower than
minus minus
35 °С 50 °С
Not less Not less
than 10 than 15
minutes minutes
5-2