[C320-list] Perkins M30 Raw Water Pump

[Mark Haralson]

Hi Guys,
I have recently purchased a 1994 Catalina 320 that has the Perkins 30 motor
in it. The raw water pump is leaking and i have purchased the rebuild kit
and a new water pump Model Ancor ST123 that is made in Italy from
Parts4Engines. Before I dive into replacing the water pump I have a
question. To remove the pump, is it simply a matter of removing the 4
screw/bolts then unscrewing the shaft from whatever it screws into to?
When installing the new pump, it has threads on the shaft and it appears
that the housing can be turned until the shaft is tight then insert the
screws/bolts.
Any tips or other procedures welcome, hopefully someone has done this
before and can provide confirmation or the proper procedure.

thanks for the help
Mark

[Dave Hupe]

Mark-
I'm not sure why you bought both a rebuild kit and a new pump.  I had the seawater pump for my 1994 Perkins Perama M30 engine rebuilt by Depco  Pump Company http://depcopump.com/ for about $277 total (would have been less, but the shaft was scored and needed to be replaced which was the most costly item).  I was concerned about the new pump model you mentioned, but see at https://www.parts4engines.com/perkins-perama-m30-raw-water-pump/  that it replaced the original Jabsco model 29450-1101. So, it should work (also, the one you bought apparently for $260 was cheaper than my rebuilt one). 


The pump removal is indeed easy....just remove the 4 bolts and it will pull off/out (it may take a little careful prying).  Pay attention to the orientation. There is a big gear attached to the end of the pump shaft that the engine drives to pump the water.  That gear will come out with the pump.  I assume you expect to be able to transfer that gear to your new pump shaft?  I don't know how easy that is since Depco did that for me.  
Reinstallation is easy.  Just slowly align the pump to the engine mount.  You may need to rotate the pump slowly as you insert the gear into the engine cavity to get the teeth lined up with the matching gear inside the engine. I oiled the gear (with diesel engine oil) before installation. There is a large o-ring that seals between the pump mount and the engine block.  Did you get that with the new pump? Make sure you have a new one before you do this job. 
I can send you some photos separately if you would like. 
Dave Hupe
1994 Cat 320 (#32)
Holland, MI

[Mark Haralson]

Thank you for the info Dave, that was exactly what I was looking for. I
bought the rebuild kit to service the old pump and keep it for a spare. I
did not get an O-ring with the new pump and did not see that item on the
web site where I purchased the new pump. Do you have a source for that
o-ring?

Thanks again for all the help
Mark

[Dave Hupe]

Mark- 
For the proper o-ring to mount the seawater pump, contact Trans Atlantic Diesel as per the info below.  I got it from them for $5.30 (they said to refer to p/n 052300700 when you call in).

Trans Atlantic Diesels, Inc. (Sheri Alexander, Office Manager)
Mailing: P.O. Box 70, White Marsh, VA 23183
Shipping: 5906 Fairfield Lane, Hayes, VA 23072
Website: www.tad123.com
Email: tad...@earthlink.net
Tele: 804-642-9296 Fax: 804-642-0340

[Mark Haralson]

that's great Dave, really appreciate the help. I will get a couple of
those ordered

thanks again
Mark

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[Warren Updike]

Dave is spot-on with his info. As I remember, I initially thought I would rebuild the pump with new parts until I realized I'd have to pull the gear off the shaft and press on a new one. That's when I found Depco Pump, and am not sorry I did. The pump came back ready to install and painted like it was new. No problems since.

The "Perkins Workshop Manual" is on our website. Section 10(page 74 of PDF,) addresses the raw water pump, and states: "Attention: Do not loosen the drive housing of the raw water pump. The alignment of this
housing has been carefully adjusted with a special alignment tool." Only the four setscrews that fasten the pump to its drive housing should be removed. (Just a caution.)

Pull it out, have it repaired. Save the old screws from the end plate for spares as these are prone to damage.

Warren and Pattie Updike
1994 C320 "Warr de Mar" #62
Middle River, MD (Chesapeake Bay)

[Mark Seyler]

When I replaced the raw water pump on the Perkins in my #232, I was able to remove the drive gear from the old pump with a loaner gear puller from AutoZone. I was able to drift the gear onto the new shaft using a large socket. I eyeballed the position of the gear. I later read in the Perkins manual that the position is supposed to be critical, but I haven’t had any problems in 6 years since then.

Mark Seyler
S/V Reality, #232

Sent from my iPhone

> On Jul 21, 2018, at 2:10 PM, Warren Updike <wup...@hotmail.com> wrote:
>
> Dave is spot-on with his info. As I remember, I initially thought I would rebuild the pump with new parts until I realized I'd have to pull the gear off the shaft and press on a new one. That's when I found Depco Pump, and am not sorry I did. The pump came back ready to install and painted like it was new. No problems since.
>
> The "Perkins Workshop Manual" is on our website. Section 10(page 74 of PDF,) addresses the raw water pump, and states: "Attention: Do not loosen the drive housing of the raw water pump. The alignment of this
> housing has been carefully adjusted with a special alignment tool." Only the four setscrews that fasten the pump to its drive housing should be removed. (Just a caution.)
>
> Pull it out, have it repaired. Save the old screws from the end plate for spares as these are prone to damage.
>
> Warren and Pattie Updike
> 1994 C320 "Warr de Mar" #62
> Middle River, MD (Chesapeake Bay)
>
> -----Original Message-----
> From: Dave Hupe [mailto:hoop...@yahoo.com]
> Sent: Saturday, July 21, 2018 12:30 PM
> To: C320...@Catalina320.com
> Subject: Re: [C320-list] Perkins M30 Raw Water Pump
>

[Dave Hupe]

Warren-
Thanks.  I don't know that I ever understood what they referred to as the "drive housing" for the pump that should not be loosened.  Is that referring to a housing that remains on the engine and covers the internal gear that engages with the big gear that comes off with the pump?
Dave Hupe1994 Cat320 "Mayan Sun" (#32)Holland, MI

Sent from Yahoo Mail on Android

On Sat, Jul 21, 2018 at 5:10 PM, Warren Updike<wup...@hotmail.com> wrote: Dave is spot-on with his info. As I remember, I initially thought I would rebuild the pump with new parts until I realized I'd have to pull the gear off the shaft and press on a new one. That's when I found Depco Pump, and am not sorry I did. The pump came back ready to install and painted like it was new. No problems since.

[Mark Haralson]

That's what I am curious about, the new water pump shaft has threads on it.
seems like the gear would screw on to the shaft. I will have to check the
old one when I pull it off and see if it has threads. I will see if I can
attach a picture of the new pump and shaft.

[Mark Haralson]

I created an Album to add the picture of the water pump
Album#337