Fuels And Lubricants - Fayat Group BOMAG BW 900-50 Service Manual

Fuels and lubricants

3.2 Fuels and lubricants
Engine oil
Quality
The oil is an essential factor for the performance and
lifetime of the engine.
Use engine oil for four-stroke engines which meets or
even exceeds the requirements for API-service class
SJ or higher (or equivalent).
Fig. 13
Viscosity
Since lubrication oil changes its viscosity with the tem-
perature, the ambient temperature at the operating lo-
cation of the engine is of utmost importance when
choosing the viscosity class (SAE-class) (see diagram
(Fig. 13)).
SAE10W-30 or 5W-30 is recommended for general
use under any temperature.
For starting/operating temperatures between 14 °F (-
10 °C) and -13 °F (-25 °C) you should use a fully syn-
thetic oil 5W-30.
When using single purpose oil you must choose the
correct viscosity for the average temperature in the
area of use.
Change intervals
The longest permissible time the lubrication oil should
remain in an engine is 1/2 year or 100 operating
hours.
Fuel
Quality
The engine has been approved for operation with un-
leaded gasoline with a octane number of 91 or higher
(or Pump Octane Number" 86 or higher).
Use only commercially available brand fuel.
You can use unleaded standard grade petrol with
maximum 10 percent by volume of ethanol (E10) or
maximum 5 percent by volume of methanol.
008 921 86
Methanol must also contain co-solvents and corrosion
inhibitors.
Using fuels with higher ethanol or methanol contents
exceeding the values specified above may cause
starting difficulties and/or performance problems.
Damage may also occur to metal, rubber or plastic
parts in the fuel system.
Engine damage and performance problems caused
by the use of fuels with higher ethanol or methanol
percentages than the ones specified above are not
covered under warranty.
Mineral oil based hydraulic oil
The hydraulic system is operated with hydraulic oil HV
46 (ISO) with a kinematic viscosity of 46 cSt (46 mm
s) at 104 °F (40 °C) and 8 cSt (8 mm
(100 °C). For topping up or for oil changes use only
high-quality hydraulic oil, type HVLP according to DIN
51524, part 3, or hydraulic oils type HV according to
ISO 6743/3. The viscosity index (VI) should be at least
150 (observe information of manufacturer).
Lubrication grease
For lubrication purposes use an EP-high pressure
grease, lithium saponified (penetration 2), acc. to DIN
51502 KP 2G.
BOMAG
3.2
2
/
2
/s) at 212 °F
31