Pump wont pressure up on one side
Pumpatude 01-12-2015
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1998 PUTZ TS2070 will not pressure out beyond about 35 BAR OR 500 psi on one side and jumps imediatly to 135 BAR on the main guage. other than that she shifts and strokes just fine but when you hold the pressure test switch on the far side she just builds 500 and lays there. She pumps slow on one stroke then fast on the other side. Maybe contaminate stuck in a cartrage? what say the bretheren?


Pumpatude 01-12-2015
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http://youtu.be/V6Mm32fWTw0


greenguy 01-17-2015
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Could be a couple things - there's a pair of 4 way three position valves with coils on both ends on your Hydraulic manifold.   One controls the Stube, the other the pump cylinders.    The big valve under the small electric one might not be shifting all the way.  

the second thing that I've seen is the controller on top of the main pump could be sticking Or worn out.  The pump will do all sorts of weird things when these start to fail.  There's two caps on the controller, the top one sets standby pressure when your volume control is set to zero (about 20 -30 bar is right, but you need to measure from the little port on the front of your volume control block as your main pump pressure gauge is read after the volume control, and zero volume will give you zero pressure).  You'll have to take the plate off the right side of the control box to get at it.  use a 60 bar gauge to set the standby, but don't turn the pump on or you'll spike your gauge.  

the bottom screw on the controller is the pressure relief for the pump. Set it at what the spec tag on your frame says. The pressure relief in the manifold will be set just below this.     

you can tell if your controller has failed if you can generate more system pressure when pressured out at end of stroke by turning your standby pressure adjustment screw in.  You'll also affect your ability to control pump volume (it might stall the engine when turning the volume control from full to zero with the engine running but pump off).  

 

Dont touch the horsepower limiter on the side of the main pump.  It's easy to set, but most guys adjust this by loosening the small jamb nut and turning the Allen head screw, which is wrong.   if you did mess with it, the correct way to adjust it is to loosen the large 27mm nut that holds the cartridge in the housing, and turn the entire cartridge in or out   

Other things to check are the check valves on the ends of your drive cylinders.  

call 416-749-2843 - cancrete equipment, if you need more help or a controller..   I think they're around $300 bucks.  


Pumpatude 01-17-2015
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Thank you, will check that out and let you know.


biged 01-17-2015
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I'm sorry to inform you but thats not 3/4 stone if it was you would never push it threw 2 in hose,it maybe 3/4 laying flat but not solid ACPA has a size sheet 4 times the rock size if you were using 3/4 rock your hose size should  be 3 in to safety pump,There are a couple guys on here that say they pump 3/4 rock threw 2 1/2 in hose I even had larger rock threw my Olin Ball Valve  but if they all were that size you would stay plugged or hurt someone.


Pumpatude 01-17-2015
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Sorry Big Ed but we pump a mix here in Nor Cal called the 6540HP20 or "3/4 Blend" it is a 6.5 sac and it has 611lbs total powder = 80% Portland cement and 20% fly ash, 500lbs 3/8 aggregate, 1050lbs 3/4 aggregate, 1500lbs sand, 16 oz. VMA. This mix breaks at 5500lbs consistently and pumps like butter through 2 1/2 inch line hose, We push it more than 300 feet with no problems. We use river gravel and delta blend sand so our materials have a pumpability you do not see everywhere. I push this mix through 2 inch hose only if we are under 100 feet and pouring inside on plastic tubing. We also frequently pump a 1 inch minus river rock through 2 1/2 inch hose here with little or no problems.... it's all in the roundness and gradation.


biged 01-18-2015
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But its not all 3/4 rock because that is size 57 I had a mix with Volinteer ready mix that used 1/4  stone  I have puped it at over 300 ft buy my main mix was 568 lbs cement 180 lbs of fly 1100 lbs sand and 1300 size 78 rock, it broke at over 6000 in 28 days where are you at in Calif I lived in the Bay Area for several years.


biged 01-18-2015
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Your pump is a swing tube,does it have proxy switches, You may have a relay going bad in your control panel


Pumpatude 01-18-2015
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  When pumping, the maximum size of the coarse aggregate is limited to one-third of the smallest inside diameter of the pump or placing line. For example, 1-1/2 inch aggregate would require a minimum placing line diameter of 4-1/2 inches.    The properties of the fine aggregate or sand are more important in the proportioning of pumpable mixes than are those of the coarse aggregate. If the sand is overly coarse, it will make a normally pumpable mix design difficult to pump while fine sand will make coarse mixes pumpable.

 


Pumpatude 01-18-2015
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Big Ed, I am in the Calif. North Bay, Santa Rosa area. We are blessed to have some of the best material, pump wise, in the world. Now there are some "Johnny come lately" suppliers here who believe in crushed coarse material. We can pump it but given the choice, I would rather pump river material any day of the week. I ran ball valve hydraulic pumps in the 80's and S-tube Maycos in the 90's Boom pumps in the 00's and now back to management of an s-tube fleet. We frequently pump 3/4 rock through 2 1/2 inch line as an industry standard around here and yes it is actually 3/4" round with about 1000lbs 3/4" per cu.yd..


Pumpatude 01-19-2015
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here is what I walked out of my hose today after water washing my lines


biged 01-19-2015
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That looks good thats a blended rock, I sold my company last Feb when ever I would be working around Kentucky lake thats what the plants used  river rock rounded edge's it pumped good 4 in slump no problem, never got down there very much.

Thats a good area Ronnert Park, I used to work in the sing business back in the 70's there is a lake that was built and opened up in the 80's a BassClub that I was in used to fish it, hang in there hows business

 

There was a kid over in Sacramento he had a Reed S tube his last name is Pride he is from Erin,TN, that was 3 years ago he  sold his pump to his Dad that has a finishing business he tried and couldn't do He tried to pump everything to dry cement block fill on a 3 or less, I pumped a few jobs for him a real pain in the ass.