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22-10-2018, 07:54
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#16
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Re: Spectra Clark Pump stalled (380c)
Quote:
Originally Posted by Segelplaner
There was an O-ring on the piston after rebuild. The Pilot valve pin are as you described - in/out. The feed pumps creates pressure, when I too loose re-assemble, the leakage is there directly. Have not measured the pressure separately.
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Sorry, I know there is a language barrier, but I'm not quite sure what you mean by this "when I too loose re-assemble, the leakage is there directly"
You should be able to test the two feed pumps by kinking off the brine discharge line on the Clark pump when each pump is running by themselves. The pressure gauge should quickly rise to around 125psi-/+ in about 1.5 seconds. This will tell us if they are putting out pressure. If they are the not the problem, then the problem in the Clark pump must be in the top block because the check valves look good and the pilot spool is correct. When the Clark pump stopped shifting what were the readings on the pressure gauge?
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22-10-2018, 08:45
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#17
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Registered User
Join Date: Feb 2013
Location: Circumnavigating@S/Y Elise
Boat: Najad 373
Posts: 114
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Re: Spectra Clark Pump stalled (380c)
I attache 3 pictures on pressure gauge:
150 - the system is shutdown
180 - both feed pumps are running without pressure
”Zero” or 200+ something - pressure are applied and both feed pumps stops and no shifting
Is there something strange with pressure gauge?
Thanks
Jonas
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22-10-2018, 16:49
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#18
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Sponsoring Vendor
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Re: Spectra Clark Pump stalled (380c)
Quote:
Originally Posted by Segelplaner
I attache 3 pictures on pressure gauge:
150 - the system is shutdown
180 - both feed pumps are running without pressure
”Zero” or 200+ something - pressure are applied and both feed pumps stops and no shifting
Is there something strange with pressure gauge?
Attachment 179429
Attachment 179430
Attachment 179431
Thanks
Jonas
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Those pressures are through the roof. Check the brine discharge hose that feeds overboard from the Clark pump to see if it's kinked over or if there is a shut off valve closed off. Also try to hook up your brine discharge pickling hose and direct it into a bucket and then start the system to see if the Clark pump starts shifting. Also check to make sure the top block is bolted down in the proper orientation. The Pressure relief valve should be above the input line from the feed pumps. The two 90 degree High pressure fittings should be on the back side opposite of the pressure relief valve. Also, with the pressure relief valve open about one full turn does water flow overboard through the brine discharge hose?
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23-10-2018, 02:51
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#19
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Registered User
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Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
I think the gauge just show strange start value, its not the actual pressure start value. The relation between pressure values seems resonable. From 150 to 180 is about 30 psi. But I cant be sure until I have an external psi measure thing, connected to brine. I dont have that kind of tool at the moment.
I am also only using the pickling hose at the moment using only fresh water in a closed water loop to a bucket.
Top block has the proper orientation.
The pressure relief is open and water flows through the brine hose.
I’ll guess the problem is somehow related to the cracked End Cap on Clark pump. Something got ”out of synk”.
Does it matter how the ”pistons” inside the tube is setup when adding pressure? Or will the Pistons ”fall” into place when pressure is added?
I have to go back to basics, try to tighten End Caps more, check for ”dirty” air, mesure pumps with external gauge, etc
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23-10-2018, 04:53
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#20
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Re: Spectra Clark Pump stalled (380c)
Yes the pistons will orientate themselves, but your pressure gauge should be in the 65psi-85psi. range. If your pumps not shifting and you have those high pressures, something is blocked somewhere. A cracked end cap will not stop the pump from shifting. You need to check the annular ring assembly in the top block.
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24-10-2018, 01:05
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#21
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Registered User
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Re: Spectra Clark Pump stalled (380c)
Quote:
Originally Posted by Tellie
Yes the pistons will orientate themselves, but your pressure gauge should be in the 65psi-85psi. range. If your pumps not shifting and you have those high pressures, something is blocked somewhere. A cracked end cap will not stop the pump from shifting. You need to check the annular ring assembly in the top block.
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I will check that, thanks
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24-10-2018, 03:07
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#22
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Registered User
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Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
I have checked the spool piston operation by injecting high compressed air. The spool piston seems to move back and forth. I hear a clicking sound when switch injection between input holes.
Will open top lock further to check annular rings.
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24-10-2018, 03:53
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#23
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Registered User
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Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
This is the top lock annular rings and the piston that runs through the rings. Also inject some high pressure air for cleaning.
I’ll assemble everything together again and hope for the best.
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24-10-2018, 05:08
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#24
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Registered User
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Re: Spectra Clark Pump stalled (380c)
The counter magnet behind one of the pistons was loose. There also some suspicious marks from the magnet on the white piston.
Can I remove the magnet, is there any important use of it?
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24-10-2018, 05:12
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#25
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Registered User
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Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
The magnet was loose and piston have some marks from magnet. Can magnet be removed?
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24-10-2018, 07:22
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#26
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Registered User
Join Date: Feb 2013
Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
Its shifting! I removed the magnet. Will do some more testing.
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24-10-2018, 08:37
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#27
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Registered User
Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
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Re: Spectra Clark Pump stalled (380c)
__________________
The question is not, "Who will let me?"
The question is,"Who is going to stop me?"
Ayn Rand
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24-10-2018, 08:46
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#28
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Registered User
Join Date: Feb 2013
Location: Circumnavigating@S/Y Elise
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Re: Spectra Clark Pump stalled (380c)
Counter magnet
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24-10-2018, 15:20
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#29
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Re: Spectra Clark Pump stalled (380c)
Quote:
Originally Posted by Segelplaner
The magnet was loose and piston have some marks from magnet. Can magnet be removed?
Attachment 179541
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THAT'S IT!. It's the spool piston. The magnet obviously has come loose (never seen that before but always a first time for everything). If this magnet comes out it is going fall down to wedge in between the spool piston and the back of the end block and stop the spool assembly from shifting dead in it's track and then stopping the Clark pump from shifting. Now whether you need this magnet depends on your electronic system. If your watermaker uses a "Stroke sensor" then this magnet has to be there. If your system uses the "Roto flow meter", then you can throw the magnet away. Stroke sensors are easy to identify. They will be located on the same end block the spool piston with magnet is located on. It is black, about the size of a dime, with a small green LED light, and a grey three wire cable coming from it.
Whew, I was starting to think I was loosing it.
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24-10-2018, 15:30
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#30
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Sponsoring Vendor
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Re: Spectra Clark Pump stalled (380c)
Quote:
Originally Posted by senormechanico
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In older Clark pumps, usually the ones using the older MPC3000 electronics. The pump used this magnet to do two things. It could be calibrated to tell you how much water was being produced and also would tell you if the Clark pump is shifting back and forth. As the pump shifts the magnet attached, as shown above, to the spool piston moves back and forth. As it move to the outer side of the end cap the magnet is picked up by the stroke sensor (mounted outside in a recess on the end cap) and the little green light on the stroke sensor lights up and sends a signal to the control panel. When the pump shifts again the spool piston and magnet is drawn back inwards and the magnetic contact is broken and the green light goes off. On newer models this stroke sensor has been replaced with a roto flow meter that uses the product water produced to spin a small pelton type wheel. This is more accurate. If either the stroke sensor or the roto flow meter fails the control panel will shut the system down in a "System Stalled"
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