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

[Mark Haralson]

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


On Sat, Jul 21, 2018 at 5:55 PM Mark Haralson <mharal59 at gmail.com> wrote:

> 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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>