Bomag BW 177 D-4 Operating Instructions Manual page 76

Maintenance
Too high viscosity can cause starting difficulties,
too low ´viscosity can jeopardize the lubrication ef-
fect and result in a high lubrication oil consump-
tion.
Fig. 121
Optimal operating conditions can be achieved by
using the oil viscosity chart (Fig. 121) as a refer-
ence.
At ambient temperatures below -40 °C (-58 °F) the
lubrication oil must be pre-heated (e.g. by parking
the machine indoors).
The viscosity is classified acc. to SAE. Multi-pur-
pose oils should generally be used.
Oil change intervals
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
at least once per year, irrespective of the operating
hours reached.
76
DQC II, DQC III, DQC IV: 500 operating hours
Caution
!
When using fuels with a sulphur content of
more than 0.5% to 1% or under permanent am-
bient temperatures below -10 °C (14 °F) and
when using biodegradable diesel fuel the oil
change intervals must be halved.
Fuels
You should only use commercially available brand
diesel fuel with a sulphur content of less than 0.5%
and ensure strict cleanliness when filling in. A
higher sulphur content has a negative effect on the
oil change intervals.
The fuel level should always be topped up in due
time so that the fuel tank is never run dry, as oth-
erwise filter and injection lines need to be bled.
Quality
The following fuel specifications are permitted:
EN 590
l
DIN 51628
l
ASTM D975 Grade-No. 1-D and 2-D.
l
JIS K 2204 Grade Fuel 1 and Grade Fuel 2
l
with lubrication properties acc. to EN 590
Winter fuel
For winter operation use only winter diesel fuel, to
avoid clogging because of paraffin separation.
Diesel fuels suitable for temperatures down to -44
°C (-47 °F) are available for Arctic climates. At
very low temperatures disturbing paraffin separa-
tion can also be expected when using winter diesel
fuel.
The admixture of petroleum and the addition of
"flow enhancing additives" (fuel additives) is not
permitted.
Mineral oil based hydraulic oil
The hydraulic system is operated with hydraulic oil
HV 46 (ISO) with a kinematic viscosity of 46 mm
s at 40 °C and 8 mm
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 (ob-
serve information of manufacturer).
BOMAG
2
/s at 100 °C. For topping up
BW 177 D-4
2
/