Page
2 (7)
Document No
4V92A0645
Rev
j
BN 30 oils are also a recommended alternative when operating on crude oil having low
sulphur content. Though crude oils many times have low sulphur content, they can contain
other acid compounds and thus an adequate alkali reserve is important. With crude oils
having higher sulphur content BN 40 – 55 lubricating oils should be used.
If both distillate fuel and residual fuel are used periodically as fuel, lubricating oil quality has
to be chosen according to instructions being valid for residual fuel operation, i.e. BN 30 is
the minimum. Optimum BN in this kind of operation depends on the length of operating
periods on both fuel qualities as well as of sulphur content of fuels in question. Thus in
particular cases BN 40 or even higher BN lubricating oils should be used.
The intervals between lubricating oil changes may be extended by adding oil daily to keep
the oil level constantly close to the maximum level.
An example of BN depletion curve with different BN lubricating oils is shown below.
Additives
The oils should contain additives that give good oxidation stability, corrosion protection,
load carrying capacity, neutralisation of acid combustion and oxidation residues and should
prevent deposit formation on internal engine parts (piston cooling gallery, piston ring zone
and bearing surfaces in particular).
Foaming characteristics
Fresh lubricating oil should meet the following limits for foaming tendency and stability,
according to the ASTM D 892-92 test method:
Sequence I:
100/0 ml
Sequence II:
100/0 ml
Sequence III:
100/0 ml
-20
0
20
40
60
0
2000
4000
6000
8000
10000
SERVICE HOURS
BN 55 Oil
BN 40 Oil
BN 30 Oil
Oil Volume: 0.6 l/kW (Wet Sump)
Fuel sulphur content: 2.5 w-%
BN Condening limit: 20 mg KOH/g
Summary of Contents for PAAE051728
Page 4: ......
Page 18: ...Appendix B Welding Precautions 200640 00 6...
Page 26: ...01 Main Data Operating Data and General Design 32 200634 01 01 8 W RTSIL 32...
Page 60: ...Appendix A Environmental Hazards 200507 02A 10...
Page 68: ...Page 7 7 Document No 4V92A0645 Rev j...
Page 84: ...03 Start Stop and Operation 32 200402 04 03 12 W RTSIL 32...
Page 98: ...04 Maintenance Schedule 32 200623 01 04 14 W RTSIL 32...
Page 154: ...07 Tightening Torques and Use of Hydraulic Tools 32 200643 01 07 30 W RTSIL 32...
Page 162: ...08 Operating Troubles Emergency Operation 32 200402 01 08 8 W RTSIL 32...
Page 164: ...Specific Installation Data 2005 01 09 2...
Page 178: ...10 Engine Block with Bearings Oil Sump and Cylinder Liner 32 200150 10 14 W RTSIL 32 34SG...
Page 216: ...Appendix A Testing of cylinder tightness 32 200142 A 4 W rtsil 20 32 34...
Page 226: ...13 Camshaft Driving Gear 32 200546 02 13 10 W RTSIL 32...
Page 254: ...15 Turbocharging and Air Cooling 32 200549 10 15 20 W RTSIL 32...
Page 274: ...16 Injection System 32 200627 01 16 20 W RTSIL 32...
Page 280: ...Fuel System 32 200508 07 17 6 W RTSIL 32...
Page 314: ...19 Cooling Water System 32 200050 19 14 W RTSIL 32...
Page 394: ...23 Instrumentation and Automation 32 200115 II 23 60 W RTSIL 32...