[C320-list] [c320-list] Re: Perkins M30 Raw Water Pump

[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.


On Sat, Jul 21, 2018 at 5:36 PM 'Dave Hupe' via c320-list <
c320-list at googlegroups.com> wrote:

> 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<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 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
>
>
>
>
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