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Sea water pump overhaul |
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D0bbies ![]() Captain ![]() ![]() Joined: 05 August 2014 Location: Falmouth, UK Status: Offline Points: 204 |
![]() ![]() ![]() ![]() ![]() Posted: 28 November 2018 at 14:34 |
Engine: 2GM20 Having noticed some water leakage from my sea water cooling pump I decided to remove it and take a close look. The whole thing came apart fairly easily and once cleaned up there was very little signs of shaft wear. ![]() The end plate which houses the impeller has an area that’s been polished by the rotating impeller leaving two slightly raised sections on the inner and outer section of the plate. could anyone offer advice on whether or not this plate started life completely flat? If so I’ll skim it. ![]() There are three seals to replace, and according to the catalogue they are: Cat No. 14 1 x O-Ring: X0506513 Cat No. 15 1 x O-Ring: X0506523 Cat No. 18 1 x Lip seal: X0529139 Your comments and experience would be appreciated Cheers Bob
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2005 312, Tiller, Engine 2GM20, SD20 Saildrive. Facnor SD 130 Furler.
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Martin&Rene ![]() Commadore ![]() ![]() Joined: 06 December 2009 Location: United Kingdom Status: Online Points: 380 |
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You may find the following of interest.
http://www.ybw.com/forums/showthread.php?400719-Substantial-money-saving-tips-for-Yanmar-GM-Series-owners/page2
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Martin&Rene Hanse 341 Dipper Wheel steering, 3 cabin layout & shallow keel, normally based in Scotland
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D0bbies ![]() Captain ![]() ![]() Joined: 05 August 2014 Location: Falmouth, UK Status: Offline Points: 204 |
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Thank you Martin&Rene, The link you posted had an interesting theme but my requirements are just for seals. It did however point me to a website that can probably supply the seals I require at a reasonable price: https://www.lancashireseals.co.uk. Many thanks Bob
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2005 312, Tiller, Engine 2GM20, SD20 Saildrive. Facnor SD 130 Furler.
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samuel ![]() Admiral of the Fleet ![]() Joined: 26 December 2004 Location: United Kingdom Status: Offline Points: 2226 |
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Instead of skimming the plate, why not just turn it over?
Edited by samuel - 29 November 2018 at 18:33 |
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Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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perry ![]() Lieutenant Commander ![]() Joined: 13 October 2015 Location: IOW Status: Offline Points: 54 |
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Sea water Pump Seals Standard lip seals at reasonable price in Nitrile Rubber are fine BUT they come standard with carbon steel springs which if exposed to sea water [not the oil seal side of pump] will corrode rapidly away. So either remove the stainless springs from old seals and fit them to new seals Or buy viton seals 'more expensive' which are usually [check with your supplier] fitted with stainless springs; as I believe nitrile rubber is better than viton in this application I remove the stainless springs from the viton seal and fit them to nitrile seals. Incidently the old trick of checking if the material is indeed stainless using a magnet, doesnt work as the grade of stainless steel used in springs is "martensitic" which is magnetic. You can get sensibly priced seals both nitrile and viton from :- https://simplybearings.co.uk Regards Perry
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Hanse 301 Round GB in 2017
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Sea-U ![]() Commadore ![]() ![]() Joined: 14 September 2012 Location: Norway Status: Offline Points: 405 |
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Big problem!
The bearings are very weak. Mine went after just 5 years. I think you should change the bearings too. |
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perry ![]() Lieutenant Commander ![]() Joined: 13 October 2015 Location: IOW Status: Offline Points: 54 |
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Further to my notes on seals, Simply bearings will supply bearings at reasonable prices.
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Hanse 301 Round GB in 2017
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D0bbies ![]() Captain ![]() ![]() Joined: 05 August 2014 Location: Falmouth, UK Status: Offline Points: 204 |
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Interesting Post "Perry". I'm changing both shaft seals and found just one dodgy bearing; ( 6001-2RSH - SKF ) so I'm replacing that as well. I'm awaiting delivery from BearingShopUK.co.uk. I'll check to see if I can swap the spring over from the old seal without damage, but there again it's not that much hassle to replace the seals every 4/5 years anyway. Nice one Samuel, I'd already thought of that but decided to skim the inside anyway. A bit of OCD maybe ![]() ![]() Going off Piste a little: I've been following the GGR with passion and was devastated yesterday to hear of Susie Goodall's plight. Thankfully she seems to be OK but I'm sure she could have caught up with and passed Uku. Great sailor. Bob
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2005 312, Tiller, Engine 2GM20, SD20 Saildrive. Facnor SD 130 Furler.
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perry ![]() Lieutenant Commander ![]() Joined: 13 October 2015 Location: IOW Status: Offline Points: 54 |
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You must change the lip seal springs its easy its just a fingernail job: note dont crush these tiny springs with heavy handed use if tweezersr small pliers. The non-stainless springs will quickly turn to rust and fall out in seawater; I know I learnt the lesson the hard way.
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Hanse 301 Round GB in 2017
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D0bbies ![]() Captain ![]() ![]() Joined: 05 August 2014 Location: Falmouth, UK Status: Offline Points: 204 |
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[QUOTE=perry]
You must change the lip seal springs its easy its just a fingernail job: note dont crush these tiny springs with heavy handed use if tweezersr small pliers. The non-stainless springs will quickly turn to rust and fall out in seawater; I know I learnt the lesson the hard way. [/QUOTE Thank you for the tip.
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2005 312, Tiller, Engine 2GM20, SD20 Saildrive. Facnor SD 130 Furler.
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