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Post Info TOPIC: Fatboy issues, any ideas? Pump will not start.


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Fatboy issues, any ideas? Pump will not start.
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I was testing out my roof cleaning setup yesterday with a new ball valve gun that I made and it was working fine, but then I turned the pump off and disconnected the hose from my chemical tank and dunked it in a bucket of water to rinse the pump out. It sprayed fine for about 10 seconds and then everything shut off. 

I think maybe it was just a blown fuse, but I checked it and it was fine. I replaced it just in case and still nothing when flipping the power on and off. I checked the on/off switch with a volt meter and that is also working properly. Delevan's website say this:


Pump will not Start
Check:
• Correct voltage (±10%) and electrical connections (checked)
• Fuse or breaker (checked)
• Pressure switch operation and correct voltage at switch (checked toggle switch, but unsure of how to check pressure switch?)
• Rectifier or motor for open or grounded circuit (unsure of how to check?)
• Locked drive assembly (is there an easy test for this?)

At this point, I am feeling like it is the pressure switch. It must be bad practice to remove the hose from the chem tank and dunk it in a bucket of water, yes/no?

I appreciate any help guys/girls.


Thanks.



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Phil Rogers
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I don't think it was switching from the tank. It could be the relay switch I have had that problem with them in the past when they are getting old. Have you tryed tappping it with a hammer { like a car starter } while the switch is on?

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I have not tried that, but I will try that.. It's gotta be some electrical component because it was working fine and then it just shut off.

The pump is not even close to a year old, so hopefully it's not the pump again.

My normal way of rinsing started leaking, which is why I disconnected the hose and dunked it in a bucket of water..



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Phil Rogers
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It's either the pressure switch or relay. If you hear a click when power is turned on it's the relay. Give me a call and we can figure it out.

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Bob, calling you in a few minutes, thanks..

When I flip the toggle switch to on, I hear nothing at all. For the record for other folks here, is it a bad idea to remove the hose from the chem tank and submerge into a bucket of water to rinse? Can this cause the problem I have or is it probably a coincidence?

Also, is it possible that there is air in the system, or would I hear the pump running at least if that were the case?

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Coincidence on the hose switch. Air has nothing to do with it if the pump does not turn on at all.

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Okay thanks, damn Murphy's Law bit my in the tail again ha ha ha.

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Excellent service from Bob at Pressure Tek, as usual.

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I think Bob frowned on my hammer idea. Let us know what the problem was.

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I'm confused. Is this posted in the premium side also? Is there 2 posts?



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Yes he placed it on both sides.

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Thought I was losing it for a second.      eyepopping.gif



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Elephant Roof and Exterior Cleaning
Raleigh North Carolina

David Hoover

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Benson NC.

Roof Cleaning Raleigh NC


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Roof Cleaning Severna Park MD wrote:

Excellent service from Bob at Pressure Tek, as usual.


 Great person to work with, I agree.



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Gotta love Bob



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Elephant Roof and Exterior Cleaning
Raleigh North Carolina

David Hoover

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Benson NC.

Roof Cleaning Raleigh NC


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Most likely it is the pressure switch relay that failed. 

I did not use my 1st Delavan Fat Boy pump  for almost 3 months after I bought it.  It was physically mounted on my trailer but not wired in before I got busy for several months.  In that time frame the SH vapors from my SH tanks had corroded the relay internals.  I have noticed on the Delavan Fat Boy pump I got the other day, that the relay is now  sealed with a potting compound.

Scott Davis sold me on the Flojet PentaFlex 7.0 that competes with the Delavan Fat Boy pump.  It comes with the relay completely incased in the potting compound  This makes the pressure switch relay impervious to its surrounding environment.  I am waiting for it to arrive.  Bob sells it also.

If the problem is the Delavan limit switch, you can test it by wiring 12 volts straight to the "+" & "-" inputs of the pump.  Thus bypassing the limit switch long enough to see if the pump comes alive.  If the pump starts then you know that it was the limit switch that failed.  Limit switches go out when the pump cycles on/off too frequently.  They are easy and cheap to fix.  Do not buy a new limit switch assy.  The actual limit switch is made by Omron and can be bought at any electronic parts distributor for under $1 each.  Big cost savings. 

If it is the limit switch, pm me and I will post Omron's part number and where I bought mine from.

It helps when you have an electrical engineering background.roof cleaning



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Phil, Call me in the morning. I am very familiar with these pump/electrical issues. I can help. Fat boys are not as complicated as they seem. Brian

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Thanks everyone, will give all ideas a try today. Brian, when should I call?

Marcus, I'd say your background came in handy!

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Sorry, I shouldn't have posted this in 2 places, I'll update both posts and they can be merged and moved one place if deemed necessary. 

Marcus, are limit switches and relays the same thing? Pressure Switch, Relay, Limit Switch, man, I apologize, but I'm still learning to work on these, so I appreciate any clarification. aww I attached a few pics so you could see what burned up(relay, I assume?).

Bob informed me of how to adjust the pressure better so the pump doesn't cycle as much, so hopefully these parts will last longer next time.



Attachments
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Phil Rogers
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Limit switches and relays are two different things.  The limit switch is inside the area that you turn with an allen wrench to set the pressure.  The limit switch has 2 red wires that come out of the assembly that it is insie of.  Those red wires go to te relay that is in your pics.  I can tell by the way that the plastic has melted around the metal spade lugs on the relay that it is over cycling.  That creates heat and is what did you in.  Replace the relay.



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Buy a second pump have it sitting in your truck . Time is money , when this problem occurs again you may be on a job not just rinsing at home . with a spare you are up and running in no time , with out one you are making excuses to the customer . I keep a spare truck to cover 3 businesses , specialized equipment that cant be rented , I have a back up . My system isnt perfect but I rarely loose work time due to equipment failure . Its too costly

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