Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 29-07-2020, 11:38   #16
Registered User

Join Date: Feb 2019
Posts: 35
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by B4A View Post
Do you guys also know what other parts will need to be replaced other than the ball bearings and the lip seal?

Does anything else brake in the process to extract the ball bearings? Do I need special tools for getting them out?
I would do the belt at the same time simply bc they are unique yanmar items not expensive and a little fussy to change. I keep the old ones for spares.
SV-Viento is offline   Reply With Quote
Old 29-07-2020, 11:48   #17
Registered User

Join Date: Oct 2014
Location: Panama City Beach, FL
Boat: Beneteau 343
Posts: 384
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by B4A View Post
Thanks!!!! And what side is the shaft supposed to come out from?
Comes out the backside, where the retaining ring comes off. Put a rag over the impeller end of the shaft as that is where the tapping with the hammer comes into action.
EmeraldCoastSailor is offline   Reply With Quote
Old 29-07-2020, 12:38   #18
B4A
Registered User
 
B4A's Avatar

Join Date: Dec 2015
Location: Sailing around the world
Boat: 2018 Robertson and Caine, Leopard 40
Posts: 213
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by EmeraldCoastSailor View Post
Lip seals for my 3ym30 raw water pumps are $12.50 from my local Yanmar dealer. I have found when the seals fail and I notice water leakage the whole pump will be damaged beyond repair (in comparison to a new pump - about $225 for me) in short order. Once, I did manage to catch one leaking and was able to replace the seal with no damage to shaft or bearings. Now I replace them yearly to preserve my pumps.
$12.50? That's a great price! Where are you located? What's the name of the dealer?
__________________
www.sailingoroboro.com
B4A is offline   Reply With Quote
Old 29-07-2020, 13:23   #19
Registered User

Join Date: Oct 2014
Location: Panama City Beach, FL
Boat: Beneteau 343
Posts: 384
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by B4A View Post
$12.50? That's a great price! Where are you located? What's the name of the dealer?
Panama City Beach, FL
Marine Maintenance - (850) 236-0061; Jimmy knows Yanmars
EmeraldCoastSailor is offline   Reply With Quote
Old 29-07-2020, 14:03   #20
Registered User

Join Date: Sep 2015
Location: East Coast Florida
Boat: Chris Craft 38 Commander 1965
Posts: 336
Re: Help with Yanmar 3YM30AE raw water pump

For years now I have put together a seal leak device that can be used on many boat water pumps.
It consist of a PVC pipe end cap pick out to closely fit around the body of the pump under the weep hole/slot in the pump body. Sometimes it takes a little heating with a torch and molding the softened plastic to the shape I want and a little trimming to make it fit snugly and straddle the pump from side to side.
Then two SS #8 machine screws are threaded into the bottom about 3/4" apart. Put an additional weep hole in the bottom about 1/8" diameter.
The assembly is held onto the pump with either or both hose clamps or plastic zippy ties.
Run a ground wire from engine block to one machine screw, and another to the other machine screw to the Ground on a warning buzzer. Fused hot to the buzzer as normal. Then when the lip seal starts to drip the rising water completes the contact between the screws and the buzzer goes off. When the engine is stopped the water drains out and buzzing stops. Works much like an over heat buzzer - but it tells you before the actual overheating.

Normally a leaking seal will not be known about because the pump continues to function normally and only fails when the bearings have had enough water exposure and seized - and major pump failure is found. Also unless the skipper does a close exam before starting the engines no drip will be seen on a stopped engine. And initial leaks are sometimes slow drips while running.
Squanderbucks is offline   Reply With Quote
Old 29-07-2020, 16:39   #21
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 11,491
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by B4A View Post
......... Do I need special tools for getting them out?
Small hammer and pieces of wood for support and to use as a drift/dolly.

More importantly - when refitting the bearings, never ever ever hammer the inside race. Ideally the bearings should be pressed into place but can be gently tapped into place using a soft drift when in the field.

A large socket with an OD slightly smaller than the OD of the outer race is useful tool along with a large vise. Used together, they become a "field press"

Quote:
Originally Posted by blubaju View Post
All suggestions correct, bearings, o-rings, lipseals, all standard industrial parts, lipseals & bearings always go together, just look for a bearing company
THIS is the best (and cheapest) source for raw water pump parts!
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 29-07-2020, 18:15   #22
Moderator
 
Jim Cate's Avatar

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 16,737
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
I read about replacing the spring with an O-ring, do you know if this is just a in the field emergency repair or do you have first hand experience on this and how long will it last?
Not an emergency repair at all... common practice in salt water pumps. Does not materially affect the life of t he seal. I've not done Yanmar pumps, but for the typical Johnson pumps we've encountered, the seals cost 2-3 dollars, even here in Oz, where everything is dearer than the USA. And the bearings were not much more, to my surprise... 6-8 bucks each. Dunno how even the Chinese can do them for that!

Jim
__________________
Jim and Ann s/v Insatiable II lying Port Cygnet again, freezing our bums off.
Jim Cate is offline   Reply With Quote
Old 29-07-2020, 19:00   #23
Registered User

Join Date: Dec 2014
Posts: 51
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by B4A View Post
The lip seal is definitely a regular maintenance item that should be specified in the Owner Manual, just as they recommend replacing engine oil and filters. But nowhere in the Use(less) Manual there is any mention of the lip seal.

Other than that, unless you tension too much the v belt after you replace the lip seal, the ball bearings should not fail.
Thanks for the info. Iíll keep an eye on it. Iíve heard itís a good engine, and it easily pushed our boat to over 8 knots during our sea trial. (38í boat).
Phyrcooler is offline   Reply With Quote
Old 29-07-2020, 19:32   #24
Registered User

Join Date: Sep 2007
Location: Queensland, Australia
Boat: None at present--between vessels. Ex Piver Loadstar 12.5 metres
Posts: 1,286
Re: Help with Yanmar 3YM30AE raw water pump

The pump is a Johnson, or it is on mine. Just replace it. You can get kits for them, but the maintenance kits I have bought do not include a bearing, just the impeller and gaskets etc.

I am sure one could buy a beat ring, once one has the size. Just avoid Chinese bearings.

.
Mike Banks is offline   Reply With Quote
Old 29-07-2020, 21:09   #25
Registered User

Join Date: Jun 2010
Location: Des Moines and the Lesser Antilles
Boat: PDQ 44i
Posts: 240
Re: Help with Yanmar 3YM30AE raw water pump

I have some notes on the rebuilding of my 3YM30 raw water pump that I will gladly share with the forum. I will add more images to a second post if necessary. I hope they post correctly.
Attached Thumbnails
Click image for larger version

Name:	1 Bearing Press.jpg
Views:	22
Size:	413.6 KB
ID:	220291   Click image for larger version

Name:	2 Various plates.jpg
Views:	23
Size:	421.4 KB
ID:	220292  

Click image for larger version

Name:	3 pump.shaft.lip.seal.jpg
Views:	21
Size:	442.7 KB
ID:	220293   Click image for larger version

Name:	4 lip seal removed.jpg
Views:	24
Size:	437.8 KB
ID:	220294  

Click image for larger version

Name:	5 Slinger removed.jpg
Views:	19
Size:	451.1 KB
ID:	220295   Click image for larger version

Name:	6 Pressing shaft out.jpg
Views:	19
Size:	419.6 KB
ID:	220296  

Click image for larger version

Name:	7 Press bearing from shaft.jpg
Views:	22
Size:	417.4 KB
ID:	220297   Click image for larger version

Name:	8 Press bearing onto shaft.jpg
Views:	26
Size:	419.1 KB
ID:	220298  

Click image for larger version

Name:	9 press bearings shaft in.jpg
Views:	20
Size:	430.1 KB
ID:	220299  
Attached Files
File Type: pdf Pump exploded diagram.pdf (401.6 KB, 12 views)
File Type: pdf 073119 rebuilding Yanmar raw water pump.pdf (67.4 KB, 11 views)
File Type: pdf Build a bearing press.pdf (41.6 KB, 11 views)
doublewide is offline   Reply With Quote
Old 29-07-2020, 21:15   #26
Registered User

Join Date: Jun 2010
Location: Des Moines and the Lesser Antilles
Boat: PDQ 44i
Posts: 240
Re: Help with Yanmar 3YM30AE raw water pump

Further to my previous post, 2 more .pdf's
Attached Files
File Type: pdf Parts for RWP rebuilding.pdf (142.3 KB, 11 views)
File Type: pdf replace lip seal.pdf (45.8 KB, 10 views)
doublewide is offline   Reply With Quote
Old 30-07-2020, 01:13   #27
Registered User

Join Date: Jul 2020
Posts: 1
Re: Help with Yanmar 3YM30AE raw water pump

My 2GMf has a Johnson Pump that leaked. I replaced the bearings with double sealed stainless bearings and lip seal cost was £55 from Simply Bearings UK.
Green Buoy is offline   Reply With Quote
Old 31-07-2020, 11:16   #28
B4A
Registered User
 
B4A's Avatar

Join Date: Dec 2015
Location: Sailing around the world
Boat: 2018 Robertson and Caine, Leopard 40
Posts: 213
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by doublewide View Post
I have some notes on the rebuilding of my 3YM30 raw water pump that I will gladly share with the forum. I will add more images to a second post if necessary. I hope they post correctly.
Amazing tutorial Doublewide! Now I feel confident I can do a rebuild myself. Thank you so much for sharing your knowledge!



Only problem is that were I am the cheapest ball bearings that I found cost about USD50.00 each. I would need two + the lip seal, so I would end up spending approx USD150.00. I also found the entire pump at USD220.00.

I don't understand the logic in Yanmar pricing...

Thank you also for sharing your PDFs! I just saw that you can get both ball bearing from Amazon for USD12.00! Fantastic!
__________________
www.sailingoroboro.com
B4A is offline   Reply With Quote
Old 31-07-2020, 11:45   #29
Registered User

Join Date: Oct 2014
Location: Panama City Beach, FL
Boat: Beneteau 343
Posts: 384
Re: Help with Yanmar 3YM30AE raw water pump

Pics of my pump rebuild jig attached.
Attached Thumbnails
Click image for larger version

Name:	329D6A4C-8068-4AF4-BABC-F585AA40AA78.jpg
Views:	9
Size:	420.4 KB
ID:	220423   Click image for larger version

Name:	170444E4-DCEE-4A24-A860-66F2C256A0C2.jpg
Views:	10
Size:	423.6 KB
ID:	220424  

EmeraldCoastSailor is offline   Reply With Quote
Old 31-07-2020, 12:20   #30
B4A
Registered User
 
B4A's Avatar

Join Date: Dec 2015
Location: Sailing around the world
Boat: 2018 Robertson and Caine, Leopard 40
Posts: 213
Re: Help with Yanmar 3YM30AE raw water pump

Quote:
Originally Posted by doublewide View Post
Further to my previous post, 2 more .pdf's
Is nut #14 in the exploded view the left handed nut?
Attached Thumbnails
Click image for larger version

Name:	waterpumpexplodedview.jpg
Views:	12
Size:	346.2 KB
ID:	220425  
__________________
www.sailingoroboro.com
B4A is offline   Reply With Quote
Reply

Tags
3ym30, pump, raw water, raw water pump, water, water pump, yanmar

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 3YM30AE with SD25 raw water flow issue B4A Engines and Propulsion Systems 15 04-12-2019 05:37
Yanmar 3YM30AE Raw water overflow/pressure relief valve? Norna3516 Monohull Sailboats 3 28-05-2019 21:43
Brown streak on Yanmar 3YM30AE jserge Engines and Propulsion Systems 15 10-04-2019 17:50
Belt on 3YM30AE Yanmar geoffr Engines and Propulsion Systems 3 24-02-2016 07:54
Raw Water Pump vs Fresh Water Pump Cheechako Engines and Propulsion Systems 44 01-02-2012 15:31

Advertise Here


All times are GMT -7. The time now is 21:21.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.