-
Service Letter SL09-51 O/SBJ MAN Diesel
Action code: WHEN COVE|IENT
Laying up vesselsPreservation of enginesfor cold laying-up
SLOg-510/SBJApril2009
ConcernsOwners and operators of MAN B&Wtwo-stroke MC/MC-C,
ME/ME-C andME-B marine diesel engines and, further-more, MAN Diesel
four-stroke L16/24,L21/31, L27/38, L32/40, L23/30 (H) andL28/32 (H)
marine GenSets
Dear Sirs
Lately, we have received requests from shipowners about
instructionsfor laying up vessels for an unspecified period of
time.
For this purpose, we have drawn up Recommendation No.
0743581-8,which is enclosed. The recommendation deals with the
procedure forlong term laying up of vessels with the main engine
and auxiliary en-gines out of operation and in cold condition.
lf you have any questions or inquiries regarding the
recommendations,please contact our Operation Department at
[email protected]
Yours faithfully
,'**Mikael C JensenVice President, Engineering
Encl.
Head office (& postal address)MAi DieselTeglholmsgade 412450
Copenhagen SVDenmarkPhone: +45 33 85 1 1 0OFax: +45 33 85 10
30mandiesel-cph@mandiesel m\M mandiesel com
Senior Manager, Engineering
PrimeServTeglholmsgade 412450 Copmhagen SVDenmarkPhono: +45 33
85 1 1 00Fax: +45 33 85 10 49PrimeSeru-cph@mandiesel com
ProductionTeglholmsgade 352450 Copenhagen SVDenmakPhone: +45 33
85 11 00Fa: +45 33 85 10 17manufacturing-dk@mandesel com
Forwarding & RecevingTeglholmsgade 352450 Copenhagen
SVDenmarkPhone: +45 33 85 1 1 00Fax: +45 33 85 10 16
MAil DieselBranch of IV1AN Diesel SE, GemanyCVR No : 31 61 1
792Head office: Teglholmsgade 412450 Coponhagen SV DenmarkGeman Reg
No : HRB 22056Amtsgericht Augsburg
lvlAN Diesel -
a mmber of the N/AN Group
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Info No': 3% 773 Laying-up ofVesselswith Engines in Cold
Condition
rdentNo': o 74 35 g1 - g.
Scale: Size:A4
Page No.:t4 (42)
Replacenent for Ident. No.:Date: Des. chk. A. C- Revision change
Chs. Not Rev20090428 TOB I OLS 0
6.18 Main starting air pipeKeep the main starting air pipe dry:
Remove the end cover of the pipe, insert dehumidifyingvapour powder
into the pipe and remount the end cover.6.19 Exhaust gas
receiYer
After removing the turbocharger gas admission pipe, blank off
the exhaust gas receiveroutlet with a steel plate cover of 3-5 mm
thickness. Adapt the cover to the flange of thecompensator.
6.20 Tirrbocharger and exhaust pipeBlank off the connection
between the turbocharger outlet and the exhaust pipe with
steelplate cover of 3-5 mm thickness. The purpose of the steel
plate cover is to avoid dust and toprotect the turbocharger from
rain water if the exhaust system water traps fail.For turbocharger
preservation, see section 8.6.21 Connection of dehumidifiersConnect
and operate the dehumidifiers as described in section 9.
7. Preservation of auxiliary engines
Auxiliary engine preservation must be performed immediately
after laying-up the vessel.Preservation maintenance must be
performed regularly during the entire laying-up periodand
dehumidifrer must be connected. See section 9 and 10.
7.1 Lubricating oil systemIt is expected that suff,cient
electric power is available to operate the lubricating oil
pump.Keep the pre-lubricating oil pump operating while turning the
crankshaft.Heating of the lubricating oil is not required during
the laying-up period.Start the lubricating oil purifier and the
purifierpre -heater 24 hours before the monthly turningof the
crankshaft.Start the pre-lubricating oil pump one hour before the
monthly turning of the crankshaft. Turnthe crankshaft3% revolutions
during the preservation work. Do not turn the crankshaft afterthe
preservation work have been finished.
Once a month, after stopping the purifier, analyse a lubricating
oil sample for water content(MAN Diesels'upper limit is
0.2%).Analyse onboard and keep a record of the water
contentleve1.
As an alternative it is recommended to use a laboratory to
analyse the oil samples for watercontent.
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MAN B&W RecommendationInfo No.: 3% i73 Laying-up of
Vessels
with Engines in Cold Condition
IdentNo': 07435 g1 - g.Scale: Size:
A4Page No.:
t6 (42)leplacement for ldent. No.:Dte: Des. chk. A. C. Revision
chanse Che. Not I Rev-20090428 TOB OLS 0
Should the top of the venting pipe be exposed to rain and dust,
it is recommended to coverthe venting pipe top.
7.11 Scavenge air receiverPlace a bag of Silica gel inside the
scavenge air receiver. It is important to place a collectingtray
for water underneath the Silica gel bag to avoid spot
corrosion.7.12 AlternatorDuring standstill, the altemator heating
elements must be connected or similar heating mustbe established to
avoid damp condensation inside the alternator. The heating of the
alternatormust be continuously operating during the laying-up
period.Corrosion protection must be carried out on machined
surfaces, on bearing parts, on the shaftand on bearing gaskets.
The bearings must be filled with protective oil, Mobilarma 524
or similar.7.13 Connection of dehumidiflerConnect and operate
dehumidifier as described in section 9.
8. Turbocharger preservation
Contact the turbocharger manufacturer before dismantling and
preservation of theturbocharger.
Follow the turbocharger manufacturer's recommendations.The
following scope of preservation work is for guidance only.8.1
Preservation
Close the lubricating oil inlet valve or blank off inlet pipe to
the turbocharger.Disassemble the gas admission casing, silencer and
insert piece.Disassemble the rotor, and nozzle ring according to
the instruction manual.Remove deposits on all gas spaces and on
turbine inlet and outlet.Clean the rotor and the nozzle ring with
boiling water until all deposits have been removed.Apply
preservation oil to the rotor and the nozzle ring. All surfaces
must be dry beforeapplying the preservation oil. The preservation
oil must be soluble in the lubricating oil.Store the rotor and the
nozzle ring in a plywood box with a cover in a dry storage place.
Makesure that the rotor is supported in the area of the journal
bearings only. The supporting areamust be covered with a thin metal
sheet made of brass. Apply preservation oil before the rotoris
placed in the support. The compressor wheel and turbine blades must
not have any contactto other parts.
Store the removed casings and silencer in a dry storage
place.
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MAN B&W RecommendationInfo No.: 3% 7i3 Laying-up of
Vessels
with Engines in Cold Condition
IdentNo': o 7435 gl - g.
Scale: Size:A4
Page No20 (42)
Replacement for Ident. No.:Date: Des. chk. A. C. Revision chanse
Chs. Not. I Rev.20090428 TOB I OLS 0
Mt20Desiccant Dehumidifier
Product Description
Munters Rotor Technology
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IdentNo': 07435 g1 - g.Scale: Size:
A4Page No.:
26 (42)eplacement for Ident. No.:Date: Des. I Chk. A. C.
Revision chanse Che. Not. I Rev.20090428 TOB I OLS 0
System 2 View from manoeuvring side
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