The use of other fuels as well as the mixing with additives is only permitted after consultation with
the engine manufacturer.
The following fuel specifications are approved:
■ Diesel fuels according to EN 590
─ (≤0.0010% Sulphur – EU: Level IIIB and higher)
■ Diesel fuels according to ASTM D975
─ (≤0.0015% Sulphur – EPA: Tier 4 interim and higher)
Never store fuel in galvanized containers!
Bio diesel:
According to EN 590 and ASTM D975, a specific portion of bio diesel is permitted in the fuel.
Depending on the country of origin, bio diesel can be produced from different plant materials and
thus have different properties.
Affected by temperature, atmospheric oxygen and time, these bio diesel components in the fuel
may decompose in the fuel and thus cause damages within the fuel system.
The fuel must be filtered before it is filled into the machine when it has been supplied in bar‐
rels or canisters. This procedure prevents fault in the fuel system cause by contamination.
2.6.4 Engine coolant recommendation
In fluid-cooled engines, the cooling fluid must be treated and monitored to prevent engine damage.
Water quality
An important factor for treating the cooling fluid is the correct water quality.
As a rule, clear and clean fresh water, as soft as possible, complying with the following analysis
values must be used:
Feature
Value
pH value
6.5 - 8.0
Chlorine (Cl)
[mg/l]
[ppm]
max. 80
Ch Sulfate
[mg/l]
[ppm]
max. 160
Alkaline ground ions
mmol/l
2.7
Hardness
°dH
15
1°dH = 0.1783 mmol/l; alkaline ground ions = 7.147 mg/l Ca
2+
or 4.336 mg/l Mg
2+
Tab. 30 Water quality parameters for cooling water
Contact the local water utilities for information regarding water quality. If the water does not meet
the parameters above, it must be treated.
If no suitable water is available, distilled or demineralized water shall be used for preparing the
coolant. Seawater, brackish water, brines and industrial wastewater are not suitable. Salts may
promote corrosion or disruptive deposits.
2
Technical Data
2.6
Engine
No.: 901779 08 USE
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M58utility SIGMA CONTROL SMART
13
