[C320-list] Perkins M30 Raw Water Pump

[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 <wupdike at 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:hoopdtwo at yahoo.com] 
> Sent: Saturday, July 21, 2018 12:30 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Perkins M30 Raw Water Pump
> 
> 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