raw water pump leak 3GM30F

[Bob 04 H260]

I am on a cruise in Bahamas, I just discovered the shaft seal is leaking on the raw water pump, 500 hrs on engine.
Can this seal be replaced in the field ?
Is it an O-ring ?
Will it cause the bushing to seize ?
I am getting about 2 quarts of water under the engine with 8 hrs of hard running, is that as bad as it gets ?
I have lots of o-rings but I doubt they use one on these pumps. I'm not sure how easy it will be to get a seal for it.
advice appreciated, Bob

 

[markwbird]

rebuild the pump

If you have some tools and can get the parts it is fairly easy to rebuild. The parts for the rebuild consist of 2 bearings, seals, gasket, impeller, etc. Not much to it. You can tap the bearings on and off the shaft with a piece of pvc pipe the same dia as the bearing and a hammer. Take you a couple hours if that. Lube the new impeller with glycerin or a similar water based lube when you assemble it to keep it from being damaged at initial startup.

 

[Claude L.-Auger]

Hi Bob,

Attaching the 2 diagrams I have FYI. You can rebuild it yourself if you find the parts. Depending where you are you might be able to fly the parts in from USA or get the pump rebuilt. It cost me $135 in Canada some years ago instead of $395 for a new pump. When I looked at the old parts it looked like a mechanical seal, similar to what is on a washing machine.

 

[woodster]

Hi Bob,

Attaching the 2 diagrams I have FYI. You can rebuild it yourself if you find the parts. Depending where you are you might be able to fly the parts in from USA or get the pump rebuilt. It cost me $135 in Canada some years ago instead of $395 for a new pump. When I looked at the old parts it looked like a mechanical seal, similar to what is on a washing machine.

they look like this the seal that is

 

[Lee Hadjiosif]

You can replace the bearings and seal and still have a leak if you make the slightest mistake in pressing the bearing. You might as well buy a new pump with a new impeller installed and be good for another 500 hrs and much easier to install.

 

[Bob 04 H260]

thanks Claude, much appreciated. It looks like some kits include a new shaft and some don't. I guess my main concern right now is does the bushing seize on these pumps or do they just leak water. A bit of water is no concern, no cooling water because the pump stopped is. The engine ran at normal temps all day no cooling issue.
Bob

 

[seadaddler]

rebuild

Here is some more info when I rebuilt
pump on my 07/yanmar /3YM30
I only need the seal do to water leak but
I was not in rush so I replaced the bearings also
and with the right tools sockets over each part and did use
a hammer also and maybe if you get the seal just replace the seal for now.
If possible I am sure I could get a new seal from Yanmar in Ft Myers or order
it the seal and have them send to you,I have had them send me parts.
Nick

 

[seadaddler]

Pump

I am pretty sure you could just replace the seal and seal washer with out
dealing with the bearing and than change the bearings at a later time.
From looking at photo take the locking ring from where pulley side is and
than where the impeller is knock the whole shaft and everything out and than can replace the 2 parts seals.
When you take the shaft out with all the bearings on you can check if the bearings are spinning free and pretty sure the leak doesn't go into the bearings.
Looking down on my pump that space in middle is where it leaks.
nick

 

[joker460]

If you can't find the parts in the Bahamas you could always contact Depco Pump Company and have them ship you a new pump for about $250 from Clearwater Florida.

Address
2145 Calumet Street
Clearwater, FL 33765
Mailing Address
PO Box 6820
Clearwater, FL 33758

Telephone
800-446-1656
727-446-1656
Fax
727-446-7867


The prices are good compared to Yanmar and these guys can help.

Good Luck

 

[All U Get]

Hi Bob,

We had that problem last winter and I agonized over it before coming up with a plan.

First was "Do I have the tools and could I screw it up"? No and yes

Second "Can I get parts here or should I move to a better spot"? Stay put and order

Third "Which is easier, pump or parts"? New pump

Fourth "Could it get worse"? Ours was and I could risk more by not fixing

For us West Marine in Miami found a pump and two bus and train rides I had the part back on the boat. It took me two hours to put it on but I was happy again and got a full night's sleep.

After I inspected the old pump I set it aside for a later date. A month later I took it apart and one bearing had already seized. Its still on the list to fix this spare. Glad I took it off my mind before we did the return trip.

All U Get

 

[kloudie1]

Seal and bearings are easily found at a good automotive supply/parts house .. Bearings are probably 6202 2RS bearings .. The "2RS" means they rave a good seal on both sides and are permanently lubricated.. The main pump seal is a rubber lip oil seal (works fine with water) and is most likely a "TC 13287" meaning the ID is 13mm, the OD is 28mm and it is 7 mm thick.. That pump is not connected to the engine block directly so leakage will not get into your engine oil. The only downside to letting it leak is that you may get enough water to get by the ball bearing seal and fail a bearing. The pump can be easily disassembled and the seal changed but I would want to change the bearings at the same time. Sometimes the shaft will have worn at the seal contact point to the point that it will leak a little even with a new seal.. Sometimes a bearing in the process of failing will allow enough shaft wobble to fail the seal.. Best to disassemble and inspect and make sure bearings are smooth and their seals are OK.. Ya may be able to get by (I wouldn't) with just changing the seal. Check my numbers when you disassemble since my parts list is a little older than your pump.

 

[Bob 04 H260]

Thanks Guys, I really appreciate the information, all useful. I will try to get a new pump if possible. We will try to move to Marsh Harbour over the next few days and look for a pump there or order one in from USA if necessary. I'll keep the old one as a spare after it is rebuilt.
Also I misspoke in my first post, I got two pints of water in 8 hrs.....not two quarts !

thanks again, Bob

 

[All U Get]

When you get a chance, let us know how nice it has been so far.

All U Get

 

[markwbird]

"Slightest mistake"

What Lee failed to mention is that a new pump is $600.00. Also, the rebuild is easy. It will not leak if you make the "slightest mistake". That is a bit dramatic. One thing all cruisers learn: you have to become self sufficient and learn how to fix things. It is simply not practical to expect to get the level of service to maintain your boat while out cruising that you get when you keep it in a marina or at home. Rebuilding an impeller is a great place to start.

 

[kloudie1]

The Marsh Harbour Boat Yard has some good reviews on Active captain.

 

[Bob 04 H260]

What Lee failed to mention is that a new pump is $600.00. Also, the rebuild is easy. It will not leak if you make the "slightest mistake". That is a bit dramatic. One thing all cruisers learn: you have to become self sufficient and learn how to fix things. It is simply not practical to expect to get the level of service to maintain your boat while out cruising that you get when you keep it in a marina or at home. Rebuilding an impeller is a great place to start.

I agree with you. I do everything myself. My question about doing a rebuild in the field was a concern for maybe a puller or press that might be needed.

I've rebuilt engines, pumps, transmissions but was not familiar with this pump and what might be required to strip it and replace seals and bearings.

As Claude mentioned if the shaft is scored from grit a new seal will leak. If I can get a new pump I'll put it on. If the old pump shaft has wear or scoring I'll take it home, built the shaft up with bronze or TIG it and turn it back down to the original size, and then put a kit into it. Now if the boat was a bit bigger I might be able to do all that on board .

I see pumps advertised on the net for a little over $300 and as high as $488. I don't know if they are equivalent or is one made in China ?

It will cost more here in Bahamas unless I can have a friend pick one up in Ft. Lauderdale when they fly over in 3 weeks.

I should have had a spare pump or rebuild kit on board, next year I will. I thought 500 hrs was too low to need a rebuild on that. The cost of an education.

Thanks for the reply, Bob

 

[joker460]

Depco Pump Company has all the pumps in stock and they are the cheapest price around, give them a call.

I lived in the Bahamas for a number of years and getting parts was always problematic , especially on the out islands and usually ended up ordering stateside.

 

[Bob 04 H260]

I notice the pump is available for a bit over $200 from a Yanmar distributor, http://shop.toadmarinesupply.com/sh...etails&mfc=Yanmar&sku=128170-42200&sectionid=

Bob

 

[Capt jgw]

I notice the pump is available for a bit over $200 from a Yanmar distributor, http://shop.toadmarinesupply.com/sh...etails&mfc=Yanmar&sku=128170-42200&sectionid=

Bob

That's actually Torreson Marine in Muskegon, MI. Great folks despite what everybody says about their prices on Universal engine parts, which is Westerbeke's fault, not theirs.

 

[joker460]

The one you linked to is not for a 3GM30F Yanmar.

The pump is a Johnson 10-24509-01. The price quoted to me was $211.53 and there is a Johnson 10-24509-02 which has a slightly higher water flow rate for $223.08

The yanmar Part Number is 128377-42500