Fuels And Lubricants - Bomag BW 80 AD-2 Operating Instructions, Maintenance Instructions

Notes on the cooling system
On water cooled engines the preparation and
monitoring of the coolant is of utmost importance,
as otherwise engine failures caused by corrosion,
caviation and freezing may occur.
The coolant is a mixture of water and a cooling
system protection agent.
The cooling system must be continuously moni-
tored. Apart from the inspection of the coolant lev-
el it means also the inspection of the concentration
of cooling system protection agent.
The concentration of the cooling system protection
agent can be checked with commercially available
test instruments (glycomat).
Danger
!
Health hazard!
The mixing of nitride based cooling system
protection agents with amine based agents will
cause the generation of highly toxic nitro-
samines.
Environment
Cooling system protection agents must be dis-
posed of environmentally.
BW 80 AD-2 Fam.
5.2

Fuels and lubricants

Engine oil
In order to assure perfect cold starting it is import
to chose the viscosity (SAE-class) of the engine oil
according to the ambient temperature.
Fig. 77
Lubrication oil with a too high viscosity index caus-
es starting difficulties. The temperature when
starting the engine is therefore of highest impor-
tance when choosing the viscosity of engine oil for
winter operation.
Oil viscosity
Since lubrication oil changes its viscosity with the
temperature, the ambient temperature at the oper-
ating location of the engine is of utmost impor-
tance when choosing the viscosity class (SAE-
class) (see diagram).
Occasional falling short of the temperature limit
(e.g. use of SAE 15W/40 down to -15°C) may ef-
fect the cold starting ability of the engine, but will
not cause any engine damage.
Temperature related lubrication oil changes can
be avoided by using multi-purpose oils. The follow-
ing oil change intervals apply also when using mul-
ti-purpose oils.
Regular lubrication oil changes
The longest permissible time a lubrication oil
should remain in an engine is 1 year. If the follow-
ing oil change intervals are not reached over a pe-
riod of 1 year, the oil change should be performed
BOMAG
Maintenance
55