CAT pump on a Dessalator Duo 60 on an SM


ianjenkins1946 <ianjudyjenkins@hotmail.com>
 

Our watermaker has over 3,500 hours since new in 2000. We love it. Although it was still working last week the CAT pump  had started to leak and needs servicing .  ( One of the longest jobs ever to take the pump out )

The pump is now with CAT pump agents in the UK.  They mention that on stripping the pump down 

" it has been de-rated as two of the plungers have been blanked off leaving only one remaining "

I know nothing about CAT pumps---does this discovery make sense?   

I have asked the same question of Dessalator but I thought I might get a quicker answer from this email, plus maybe adding to the general knowledge of other owners.

Ian and Judy, Pen Azen, SM 302, Kilada, Greece


Michael Winand
 

Yes, I have the same pump and 2 of the plungers are blanked. This is on the d60.
It is for the electric motor to power the pump. On 24v. 
Michael Nebo sm251 

On Thu, 17 Nov 2022, 3:25 am ianjenkins1946 <ianjudyjenkins@...>, <ianjudyjenkins@...> wrote:
Our watermaker has over 3,500 hours since new in 2000. We love it. Although it was still working last week the CAT pump  had started to leak and needs servicing .  ( One of the longest jobs ever to take the pump out )

The pump is now with CAT pump agents in the UK.  They mention that on stripping the pump down 

" it has been de-rated as two of the plungers have been blanked off leaving only one remaining "

I know nothing about CAT pumps---does this discovery make sense?   

I have asked the same question of Dessalator but I thought I might get a quicker answer from this email, plus maybe adding to the general knowledge of other owners.

Ian and Judy, Pen Azen, SM 302, Kilada, Greece


ianjenkins1946 <ianjudyjenkins@hotmail.com>
 

Thanks, Michael , 
Good to know that’s normal 
Ian

Sent from Outlook for iOS

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> on behalf of Michael Winand <mickwinand@...>
Sent: Wednesday, November 16, 2022 6:43:49 PM
To: main@amelyachtowners.groups.io <main@amelyachtowners.groups.io>
Subject: Re: [AmelYachtOwners] CAT pump on a Dessalator Duo 60 on an SM
 
Yes, I have the same pump and 2 of the plungers are blanked. This is on the d60.
It is for the electric motor to power the pump. On 24v. 
Michael Nebo sm251 

On Thu, 17 Nov 2022, 3:25 am ianjenkins1946 <ianjudyjenkins@...>, <ianjudyjenkins@...> wrote:

Our watermaker has over 3,500 hours since new in 2000. We love it. Although it was still working last week the CAT pump  had started to leak and needs servicing .  ( One of the longest jobs ever to take the pump out )

The pump is now with CAT pump agents in the UK.  They mention that on stripping the pump down 

" it has been de-rated as two of the plungers have been blanked off leaving only one remaining "

I know nothing about CAT pumps---does this discovery make sense?   

I have asked the same question of Dessalator but I thought I might get a quicker answer from this email, plus maybe adding to the general knowledge of other owners.

Ian and Judy, Pen Azen, SM 302, Kilada, Greece


David Vogel
 

Re CAT Pumps for D60, and I am not sure which model we have on SM#396, (I assume either 237 or 277), but this is the tech info I have on-file on this matter, FWIW.

 

+++

On some units, the centre plunger is removed and the cylinder blocked off.  This is done in order to reduce the flow for water-making systems producing less than 160lph.  Check whether the model number is 237 or 277 - these models use the same seals and o-rings kits, with the Model 237 being a short-stroke 1725 RPM model, with same pressure output but lesser maximum flow rate than the 277.

 

237 Technical Specifications

Stroke:                                                 7.3 mm / 0.287" 

Max Flow                                 8.7lpm / 2.3gpm

Pressure Range:                      6.9–103bar  / 100–1500psi

Inlet Port Size:             1/2" NPT(F)

Discharge Port Size:    3/8" NPT(F)

Pump RPM:                             1725

Drive Type(s):               Belt, Clutch, Flexible Coupling and Bellhousing

Material:                                  Nickel Aluminum Bronze

 

277 Technical Specifications

Stroke:                                                 12.7 mm / 0.500"

Max Flow:                                13.2lpm / 3.5gpm

Pressure Range:                      6.9–103bar  / 100–1500psi

Inlet Port Size:                         1/2” NPT(F)

Discharge Port Size:    3/8” NPT(F)

Pump RPM:                             1420

Drive Type(s):               Belt, Clutch, Flexible Coupling and Bellhousing

Material:                                  Nickel Aluminum Bronze

 

 

+++

David

SM#396, Perigee

Bay if Islands, NZ


ianjenkins1946 <ianjudyjenkins@hotmail.com>
 

Thanks, David,

I think it all now makes sense.  My CAT pump hasn't been touched since it was installed and has worked very well, so I will have it repaired with the same configuration the service agents found when they opened it up.

 Ian + Judy, Pen Azen, SM 302 , Kilada, Greece

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> on behalf of David Vogel <david.vogel@...>
Sent: 16 November 2022 20:37
To: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
Subject: Re: [AmelYachtOwners] CAT pump on a Dessalator Duo 60 on an SM
 

Re CAT Pumps for D60, and I am not sure which model we have on SM#396, (I assume either 237 or 277), but this is the tech info I have on-file on this matter, FWIW.

 

+++

On some units, the centre plunger is removed and the cylinder blocked off.  This is done in order to reduce the flow for water-making systems producing less than 160lph.  Check whether the model number is 237 or 277 - these models use the same seals and o-rings kits, with the Model 237 being a short-stroke 1725 RPM model, with same pressure output but lesser maximum flow rate than the 277.

 

237 Technical Specifications

Stroke:                                                 7.3 mm / 0.287" 

Max Flow                                 8.7lpm / 2.3gpm

Pressure Range:                      6.9–103bar  / 100–1500psi

Inlet Port Size:             1/2" NPT(F)

Discharge Port Size:    3/8" NPT(F)

Pump RPM:                             1725

Drive Type(s):               Belt, Clutch, Flexible Coupling and Bellhousing

Material:                                  Nickel Aluminum Bronze

 

277 Technical Specifications

Stroke:                                                 12.7 mm / 0.500"

Max Flow:                                13.2lpm / 3.5gpm

Pressure Range:                      6.9–103bar  / 100–1500psi

Inlet Port Size:                         1/2” NPT(F)

Discharge Port Size:    3/8” NPT(F)

Pump RPM:                             1420

Drive Type(s):               Belt, Clutch, Flexible Coupling and Bellhousing

Material:                                  Nickel Aluminum Bronze

 

 

+++

David

SM#396, Perigee

Bay if Islands, NZ


Dan Carlson
 

Does anyone have recommendations for the CAT pump service in the eastern Caribbean? 

It's on my list for service soon and I'm in Antigua sailing my way slowly south this season.

Thanks and regards, Daniel Carlson on sv BeBe, SM #387


On Wed, Nov 16, 2022, 12:25 PM ianjenkins1946 <ianjudyjenkins@...> <ianjudyjenkins@...> wrote:
Our watermaker has over 3,500 hours since new in 2000. We love it. Although it was still working last week the CAT pump  had started to leak and needs servicing .  ( One of the longest jobs ever to take the pump out )

The pump is now with CAT pump agents in the UK.  They mention that on stripping the pump down 

" it has been de-rated as two of the plungers have been blanked off leaving only one remaining "

I know nothing about CAT pumps---does this discovery make sense?   

I have asked the same question of Dessalator but I thought I might get a quicker answer from this email, plus maybe adding to the general knowledge of other owners.

Ian and Judy, Pen Azen, SM 302, Kilada, Greece


Nick Newington
 

In Falmouth harbour there used to be Watermaker Services. Very good outfit.

Not sure if it is still there but worth checking.
Nick

S/Y Amelia aml l54-019 Leros Gr


On 24 Nov 2022, at 14:57, Dan Carlson <carlsdan61@...> wrote:

Does anyone have recommendations for the CAT pump service in the eastern Caribbean? 

It's on my list for service soon and I'm in Antigua sailing my way slowly south this season.

Thanks and regards, Daniel Carlson on sv BeBe, SM #387


On Wed, Nov 16, 2022, 12:25 PM ianjenkins1946 <ianjudyjenkins@...> <ianjudyjenkins@...> wrote:
Our watermaker has over 3,500 hours since new in 2000. We love it. Although it was still working last week the CAT pump  had started to leak and needs servicing .  ( One of the longest jobs ever to take the pump out )

The pump is now with CAT pump agents in the UK.  They mention that on stripping the pump down 

" it has been de-rated as two of the plungers have been blanked off leaving only one remaining "

I know nothing about CAT pumps---does this discovery make sense?   

I have asked the same question of Dessalator but I thought I might get a quicker answer from this email, plus maybe adding to the general knowledge of other owners.

Ian and Judy, Pen Azen, SM 302, Kilada, Greece