Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-03-2012, 17:09   #1
Registered User

Join Date: Dec 2011
Posts: 30
Arrow Watermaker Replacement Pump & Magnetic Clutch

Hello,

I'm looking for a replacement pump for my watermaker (its a belt powered watermaker, from the engine), Legacy HD Belt Drive pumps look about right to replace the current high pressure pump on the system.

Problem is though, it doesn't have any kind of clutch for it to be disabled (on the current pump, a magnetic clutch is used).

My question is: is the magnetic clutch part of the pump itself, or something that is installed on it (and they are purchased separately)?

Seeing as my current (broken) water pump already has a magnetic clutch, which is attached to the shaft, this could be removed and attached to the new one... is that correct?
__________________

__________________
chardis is offline   Reply With Quote
Old 05-03-2012, 17:15   #2
Registered User
 
brankin's Avatar

Join Date: Jul 2010
Location: Florida
Boat: Endeavour 43
Posts: 232
Re: Watermaker Replacement Pump & Magnetic Clutch

Yes, that is correct!
__________________

__________________
brankin is offline   Reply With Quote
Old 05-03-2012, 17:29   #3
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Watermaker Replacement Pump & Magnetic Clutch

FYI those pumps are rebuildable.>>> http://www.catpumps.com/
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 05-03-2012, 17:32   #4
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

Thanks guys...

Yeah, the pump is rebuildable, but has already been rebuilt twice in the last 6 months and broken again. I put the wrong oil in there previously and after that it's just given up, even after changing the oil to the right one. At this point it's just going to be both cheaper and easier to buy a new one, especially since the parts & seal kit for the current one is very difficult to get hold of. This is why I'm looking at the Legacy pump now, as it's a more common brand and will be easier to maintain.
__________________
chardis is offline   Reply With Quote
Old 05-03-2012, 19:16   #5
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: Watermaker Replacement Pump & Magnetic Clutch

Yeah once the crankcase goes it's a good idea to consider a new one. But not all 12V clutch assemblies are the same. The mountings can be different from one manufacturer to the next. Even Cat pumps have several different mountings for their pumps and are not interchangable. These clutchs can cost around $200. Unless your set on changing to a different manufacturers pump, matching your new pump with the old one might make the best financial sense. That way you know the clutch will bolt righ back in. Does Legacy make a SS manifold?
Tellie is offline   Reply With Quote
Old 05-03-2012, 20:00   #6
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

This seems to be getting more complicated...

The Legacy pump info is here:
Legacy HD Pumps
I'm looking at this model:
GD4020R.1

The manifold is brass.

The info is:
SKU, MODEL, GPM, PSI, HP, PUMP SPEED, BORE, STROKE, PRICE
SM-8.916-557.0, GD4020R.1, 4, 2000, 5, 1550, 18mm, 13.6mm, $322.70

The clutch I have is Ogura MA-6A.

How do I find out if they are compatible?
__________________
chardis is offline   Reply With Quote
Old 05-03-2012, 23:50   #7
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Watermaker Replacement Pump & Magnetic Clutch

According to the clutch specs you show (Ogura MA-6A) it appears to take a tapered shaft >>http://www.highgateair.com.au/images...f/Clutches.pdf
I'd take your old clutch off to be sure. The pumps all show bores or straight shafts.

And the pump you show has a 24mm straight shaft.>> Legacy HD Pumps

Maybe you could contact them to see if you can get a metric drive clutch or choose a different manufacture.
What are your old pump #'s???
And a picture of your old stuff would be nice to confirm this is what you have.

Quote:
Seeing as my current (broken) water pump already has a magnetic clutch, which is attached to the shaft, this could be removed and attached to the new one... is that correct?
If all the new numbers are the same as the old pump and clutch, it should.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 06-03-2012, 00:45   #8
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

Thank you for your help!

It's just getting more and more complicated!

The old pump I have is one of the ST series, HC240, from:
Pompe ad alta pressione per la pulizia industriale | Hawk Pompe

I've attached a photo of the Hawk Pump (current) and the Legacy Pump (potential replacement). The shafts look to be similar to me. What should I look for here? (I have no experience in this area.)
Attached Thumbnails
Click image for larger version

Name:	pumps.jpg
Views:	148
Size:	35.1 KB
ID:	38345  
__________________
chardis is offline   Reply With Quote
Old 06-03-2012, 16:48   #9
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: Watermaker Replacement Pump & Magnetic Clutch

Quote:
Originally Posted by chardis View Post
Thank you for your help!

It's just getting more and more complicated!

The old pump I have is one of the ST series, HC240, from:
Pompe ad alta pressione per la pulizia industriale | Hawk Pompe

I've attached a photo of the Hawk Pump (current) and the Legacy Pump (potential replacement). The shafts look to be similar to me. What should I look for here? (I have no experience in this area.)

The two shafts have to be identical diameter, depth, and keyed alike. My guess is that they are not. Also both of the four bolt patterns have to be exactly the same as well, again my guess is that they are not. Search for the specs on both and see if you can't find the measurements.


PS, If it were me I'd go with another Hawk. At the least you can get one with a SS manifold.
Tellie is offline   Reply With Quote
Old 06-03-2012, 18:23   #10
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

Alright, it probably would save a lot of trouble to get another Hawk, but the problem there is that I can't find anywhere online that sells them. Especially the same model: HC240.

Though there seems to be something weird going on between the brands Hawk and Hotsy. Possibly Hotsy is another name for the same pumps? Because it seems that they use all the same spare parts and when dealers are sometimes displaying Hawk pumps under Hotsy or Hotsy pumps under Hawk categories.

It might be that Hawk is the European brand and Hotsy the US brand for the same pump. But in that case, would they be identical, or is there going to be a difference in shaft size with the metric/imperial difference?
__________________
chardis is offline   Reply With Quote
Old 06-03-2012, 19:35   #11
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Watermaker Replacement Pump & Magnetic Clutch

According to the spec sheet there are two different models of the HC240 w/2 different shaft sizes. Do you have the A or the I model?

There also a break down of the pump.>>> http://www.hawkpumps.com/uploads/ima...4cee23f2d9.pdf


__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 06-03-2012, 22:22   #12
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

Quote:
According to the spec sheet there are two different models of the HC240 w/2 different shaft sizes. Do you have the A or the I model?
Yes, that has been annoying me. I have no idea which version of the HC240 my pump is because it doesn't say either on the pump or on the manual, it just says HC240.

I'm now looking at CAT pumps with inbuilt clutch... that might solve the issue.
__________________
chardis is offline   Reply With Quote
Old 07-03-2012, 01:49   #13
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Watermaker Replacement Pump & Magnetic Clutch

If you take the mag clutch off of yours the shaft size will tell you which one it is.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 07-03-2012, 02:39   #14
Registered User

Join Date: Sep 2009
Location: Mackay,QLD, Australia
Boat: planning a approx 45ft cat
Posts: 3,651
Images: 3
Re: Watermaker Replacement Pump & Magnetic Clutch

Clutches do fail in marine enviro so a new pump and clutch could be in order anyway.
__________________
downunder is offline   Reply With Quote
Old 10-03-2012, 02:02   #15
Registered User

Join Date: Dec 2011
Posts: 30
Re: Watermaker Replacement Pump & Magnetic Clutch

Thank you everyone for your help.

I've settled on a CAT pump with its own CAT magnetic clutch. The brass housing pump is less than half the price of the stainless housing pump, for the same pump. So it makes sense to go with the brass. Does anyone think that's a bad idea?

The link is:
AutowashOnline | The best prices for CAT 3CP1120

I have a question about the clutch, which I can't find answered anywhere else:
The clutch options is either single groove or double groove. The double groove clutch is cheaper, so I am inclined to go with that. Are the grooves going to be the same size, or does the dual groove clutch have smaller grooves? I'm assuming I could install the dual groove clutch but only put the belt on one of the grooves? Or have I misunderstood this completely?

Sorry if these are basic questions, I'm new to boating and don't have that much mechanic experience.
__________________

__________________
chardis is offline   Reply With Quote
Reply

Tags
watermaker

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Boric Acid Remains in Watermaker Water Katiusha Plumbing Systems and Fixtures 32 21-01-2013 23:31
Crew Wanted: Islands of Atlantic France & Rias of Spain RogerLloyd Crew Archives 1 19-03-2012 07:08
EPDM Lewmar port seals (replacement) for leaking seals Panamajames Construction, Maintenance & Refit 3 05-03-2012 13:47
HELP! Need RT80 VHF Schematic - B&G , Kenyon , Vigil ... All the Same Wireless1 Marine Electronics 2 05-03-2012 10:50
Yanmar 3GM Fuel Pump Lever Operation JD.M Engines and Propulsion Systems 3 04-03-2012 15:04



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:29.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.