POSEIDON Pegasus Deluxe Manual

Pegasus Seals Deluxe
124 mm (Forw)

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
2of 20
Installation & maintenance manual
Order number : Poseidon: 15000710
Vessel name / Number :
Serial number Pegasus seal :
Size :124mm
Assembly drawing :26.124BRIB.400
BV type approval number : Certificate 21649/BO BV
File number ACM137/1602/001
Product code 07251
Product marks : type :Pegasus seal inboard bronze (FWD) (4pc.)
: Size :124mm
:
: Bureau Veritas mark: BV Certificate for Sealing Gland No: 2169RTD15
The 124 mm Pegasus Seal Deluxe for the FCS5009 is of a special
design. As extra this seal is NOT equipped with a spigot and so
radially adjustable in alignment to the position of the shaft.
Further special precautions are taken to minimize galvanic corrosion.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
3of 20
Table of contents
Introduction...................................................................................................... 4
1 Product description ....................................................................................... 5
1.1 Equipment checks and precautions before installation .................................. 5
1.2 Limitations ……………………………………………………………………………………………………..…… .6
2 PEGASUS Deluxe inboard SEAL ...................................................................... 7
2.1 General....................................................................................................7
2.2 Installation precautions..............................................................................7
2.3.1 Installation of a new Pegasus seal ...........................................................8
2.3.2 Installation of split seals ………………………………………………………………………………… 12
2.3.3 Overhauling / replacement Pegasus seal ……………………………………………………….13
2.5 Alignment of the seal………………………………………………………………………………………… .14
2.6 Zero wear-down measurements ………………………………………………………………………. 16
3 Start-up procedure …………………………………………………………………………………………………… .17
4 Periodic maintenance ………………………………………………………………………………………………… 18
5 Trouble shouting………………………………………………………………………………………………………….19
7 Service and spare parts …………………………………………………………………………………………… .20
8 Drawing

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
4of 20
INTRODUCTION
This manual gives guidance for a professional installation, maintenance and disassembly
of the Poseidon Pegasus seals.
The instructions in this manual are accompanied, where necessary, by special symbols
indicating particular hazards.
Caution!
Danger to the product and/or other machines.
These hazardous situations can arise when:
•Inadequately trained staff service the product;
•The product is inexpertly installed, maintained or disassembled;
•The product is used for purposes other than those for which it was
originally designed.
In addition to the above hazard symbols, additional information is accompanied by the
following symbol:
Extra information
All persons responsible for installation, maintenance or disassembly of the
product must:
•Be familiar with the contents of this manual;
•Have adequate technical skills.
Although the information in this manual has been composed and verified as accurately as
possible and the descriptions are as clear as possible, no liability can be accepted for
errors and/or deficiencies in the work done during maintenance, installation or start-up
procedures.
This document remains the property of Poseidon Propulsion B.V. All rights reserved. This
document or any part thereof may not be made public or disclosed, copied or otherwise
reproduced or used in any form or by any means, without prior permission in writing
from Poseidon Propulsion B.V.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
5of 20
1Product description
1.1 Equipment checks and precautions, done by Poseidon, before dispatch to
Yard.
•All assemblies and components supplied by Poseidon have been carefully
inspected before shipment.
•Each component is suitably packed and protected to prevent damage or
deterioration during shipment, transit or storage. Any specific storage or handling
requirements will be clearly identified on the package.
1.2 Checks on receipt by (outfitting)Yard
•Goods should be examined on receipt to verify the contents and their condition.
•Poseidon should be immediately advised of any damage or discrepancy in the
range of products supplied. Damage which is clearly caused by handling in transit
should be notified to the carrier.
•Keep goods in their original packing until just prior to installation in order to
protect them optimally.
•Care must be taken during handling to prevent any mechanical damage occurring
due to dropping, crushing etc., especially on the ceramic coated wearing liner.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
6of 20
1.3 Limitations
•When in use, the seals can absorb radial swing of the shaft. This depending on the
shaft diameter, in combination with the actual shaft revs/min, this will vary.
•The maximum radial dynamic movement of the shaft is to be not more than 0.4
mm.
•If during operations a shaft will frequently swing more than 0.4 mm, a serious
alignment problem has shown up and immediately repairs are required. The shaft
may exceed marginally bigger radial movements during manoeuvring at lower
speed.
•When the shaft is NOT running, a maximum bearing clearance of 1% will still keep
the seals tight (see instructions wear down measurements)
•The seals can take no higher speeds then 14 m/s.
•The maximum standard operating temperature is 80 degrees Celsius.
The maximum run out, measured on the liner, is to be less than 0.05 mm

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
7of 20
2.1 General
The Pegasus open water stern tube seal system consists of a Pegasus inboard seal only.
Water circulation for the seals is particularity not required but is required to lubricate the
water lubricated bearings in the tube.
The Pegasus deluxe forward seal consists of a housing that contains 2 lip seals which run
on a ceramic coated stainless steel liner. The intension is to prevent (sea)water coming
into the vessel.
The seals are water lubricated supported with a grease that is injected between the
seals. This grease extents the lifespan of the seals.
The Pegasus seal is also equipped with an inflatable emergency seal, here after
called “Stand by Seal”.
This stand by seal can only be inflated/used when the shaft is NOT rotating.
2.2 Installation precautions
The following precautions must be taken before commencing the installation of the
Pegasus seal:
•Check the shaft and stern tube for damage and/or dirt;
•The shaft and stern tube should be free of imperfections such as dirt and/or
damage/burs.
•Check the goods for transport damage and/or incompleteness; If any transport
damage is noted and/or anything is missing, contact Poseidon.
•Check the connection sizes;
•If the connection sizes do not match with those in the drawing, the stern tube seal
cannot be fitted. In this case, consult Poseidon.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
8of 20
2.3 Installation of the Pegasus seal
A new seal is delivered fully assembled.
2.3.1 Installation of a complete new seal during vessel new-building-
period or during overhaul with a removed propeller shaft.
Information
1. The seal is supplied included a stern tube adaptor, isolators and packing.
2. The stern tube adaptor needs to be provided with a coating system per instructions paint
supplier.
3. The adaptor flange has NO spigot, so alignment (and readjustment) of the seal is fully
possible.
4. The isolators are included to achieve a maximum galvanic isolation of the seal to prevent
galvanic corrosion.
5. The liner is mounted inside the seal when shipped. When mounting the seal the liner has to
be removed and installed at later stage.
6. First install the shaft before mounting the seal!! This will prevent that the shaft, during
installation can lean on the seal, radial lip seals a damage them. So the seal will rest on
the shaft.
7. Before installing the shaft check that the springs of the radial lip seals are all in place.
8. APPLY 30cc GREASE BETWEEN THE SEALS BEFORE INSTALLATION. To be used is any
lithium grease such as; Mobil Unirex EP, Shell Albida RL The space between the seals is to
be filled by approx 50%. Poseidon supplied a container with 300 cc grease with the seals.
9. Torque the mounting bolts up as per instructions in table below
Torques in Nm for all StSt A4 - 70 bolts
Friction coefficient taken = 0.20
M8 24.1
M10 47.9
M12 82
M16 204
Clean the working area before proceeding installation.
The seals are sensitive to dust and dirt.
Further the shaft liners need to be equipped with smooth 15 degree
chamfers facilitating that the radial lip seals can slide in place.
Check the shaft on diameter tolerances. The OD should be machined
to h7.
Provide the shaft with some grease. This make the liner slide easier
over the shaft.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
9of 20
Mounting procedure (item numbers given will correspond with the drawing)
1. When bringing the shaft in, slide the gaskets, the adaptor flange, the seal and gasket
over the shaft.
2. The wearing liner (item 2) and the clamp ring (item 3) with all O-rings (item 11) are
placed on the shaft, away from the Pegasus seal.
3. Place the adaptor flange gasket (item 15) against the stern tube face using a little
lithium grease between so it sticks on the tube to preventing falling down.
4. Mount the adaptor flange (item 9) and apply torques as per table page 8.
5. Place the seal gasket (item 14) against the adaptor flange face, again using a little
lithium grease between so it sticks on the tube to preventing falling down. Also the
grease will make it possible to (re)adjust the seal later on.
6. Mount the seal house using the mounting bolts (item 25) with isolators (item 28) and
rings (item 30/29). DO NOT TIGTH THE BOLTS. Just tight them in a way that the seal
“just stays in place” around the shaft
7. Install water inlet and stand by seal equipment
8. Position the Wearing liner (item 2) sliding it gently back avoiding that the radial lip
seals (item 12) get damaged.

Eurekaweg 4 2991 ZB Barendrecht
T [phone]
[e-mail]
www.poseidon-bv.nl
Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
10 of 20
9. Place the wearing liner(item 2) in a way so that the radial lip seals (item 12) will run on
the ceramic raceway. (sea fig. below) Taking in account the travel of the shaft due to
propeller trust.
10.Place the O-ring (item 11) between the forward face of the wearing liner (item 2) and
locking ring (item 3)
11.Mount the screws (item 21 and 22) and apply torques as per table page 8.
12.Follow the further instructions in 2.5 alignment and 3 start up.
The maximum run out, measured on the liner, is to be less than 0.05 mm