3.2.4. Hydraulic Oil
Only the quality hydraulic oil of power class under ISO 6743/ HV
(corresponds to DIN 51524, Part 3 HVLP; CETOP RP 91 H) must be
used for the Machine’s hydraulic system.
Fill the Machines with hydraulic oil of cinematic viscosity -
68 mm
2
/s at 40 °C (104 °F), i.e. ISO VG 68. This oil is most ap-
propriate for the use within the widest range of ambient tem-
peratures.
Note:
Hydraulic system is possible to be lled with synthetic oil which
during any leakage will be restless-degraded via microorgan-
isms found in water and soil.
Please, always consult with the oil pro-
ducer or dealer when switching to an-
other type of oil or when blending oils of
various brands together.
3.2.3. Cooling Liquid
Fill engine cooling system with cooling liquid that consists 50%
of ethylene-glycol antifreeze mixture and 50% of water.
Do NOT use earthy water with high content of calcium and mag-
nesium which causes formation of scale (incrustation), and with
high content of chlorides and sulphates which cause corrosion,
refer to CUMMINS Engine Operation And Maintenance Manual.
Max content of calcium and magnesium compounds is 170 mil-
ligrams – hardness of water
Max content of chlorine compounds is 40 milligrams
Max content of sulphur compounds is 100 milligrams
Never use ratio between antifreeze
cooling medium and cooling liquid of
over 50 % (point of congelation is -36 °C
[-34 °F], boiling point is 110 °C [228 °F])
unless badly required.
Never use ration of over 68 %!
We do not recommend antifreeze agents
to be mutually mixed. Mixing together
various types of cooling liquids may
cause loss of antifreeze characteristics.
Check the portion of antifreeze coolant
in cooling liquid always before winter
period, using refractometer (density
meter).
Health hazardous nitroamines occur
when mixing nitride-based antifreeze
coolant with amine-based agent.
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