Reply
 
Thread Tools Display Modes
Old 09-11-2019, 08:18 PM   #1
Member
 
Join Date: Apr 2018
Location: NC
Posts: 56
Water pump fails to totally cut off on battery

I posted this on the Tech - Plumbing section but did not get a single response. Any of you Boondockers heard of an issue like this?


Water pump fails to totally cut off on battery
2015 Coachman Clipper 16B.
When dry camping and on battery only, by the 2nd day the water pump begins to randomly not cut off fully. It appears to run until it reaches nearly full pressure, begins to slow down and then stalls in a high current draw position without cutting off. I have a plug-in digital voltage monitor plugged into the 12VDC adapter port and can watch the voltage go quickly down from 12.35 volts and hang at about 11.85 volts in a RED under-voltage condition. I turn the faucet OFF and then manually turn the wall mounted pump switch OFF and the voltage immediately jumps back up to 12.34 or so. The pump will then stay OFF until I run more water and the pressure drops and calls for more water pressure again.


Is this a common problem with the WFCO PD130-1240E pump (according to the mfg installed utilities list that is what I have)?


Is there a pressure adjustment or does a solenoid need a squirt of WD40? It works fine when we have AC hookups instead of battery only.


Thanks for your insight.
__________________

__________________
Outsider
Southern NC
Outsider is offline   Reply With Quote
Old 09-11-2019, 09:30 PM   #2
Just as confused as you
 
Scrapper's Avatar
 
Join Date: Aug 2013
Location: Wilderness CG, WI
Posts: 3,639
Never heard of a WFCO PD130-1240E water pump. Most rv water pumps are either Flojet or Shurflo.
__________________

__________________
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
The Faster I Go, The Behinder I Get.
Scrapper is online now   Reply With Quote
Old 09-12-2019, 08:08 AM   #3
Retired Panpsychist
 
Theo's Avatar
 
Join Date: Jul 2016
Location: Western Massachusetts
Posts: 422
This is the OP's water pump, I believe:

WFCO Water Pump

IIRC, there is an internal pressure sensor in the pump that stops it from running when the proper PSI exists. Perhaps the sensor has failed or was not "calibrated" correctly.

You may want to research whether the sensor is adjustable.
__________________
Theo & Carol

2007 GoldenDoodle ("Cooper")
2020 Rockwood Roo 23IKSS
2015 F-150 SCab, 5.0L, 3.73, 36gal, HD Towing Pkg (53A), 1,980lb Payload
Theo is offline   Reply With Quote
Old 09-12-2019, 08:33 AM   #4
Site Team
 
Flybob's Avatar
 
Join Date: Oct 2014
Posts: 11,168
Check your battery. It is possible the battery is starting to go bad ( 4+ yrs old if original) and that after running for a short time the battery voltage is too low for the pump to fully pressurize the system to trigger the cut-off. If you can, try it connected to shore power or a generator. it would be interesting to see if you still have this issue. As you can see from the attached chart, the running voltage you are seeing is pretty low.
Attached Thumbnails
Click image for larger version

Name:	battery-state-of-charge.jpg
Views:	46
Size:	56.9 KB
ID:	214750  
__________________

2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
Flybob is online now   Reply With Quote
Old 09-12-2019, 01:11 PM   #5
Senior Member
 
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 2,666
Or you could

Quote:
Originally Posted by Flybob View Post
Check your battery. It is possible the battery is starting to go bad ( 4+ yrs old if original) and that after running for a short time the battery voltage is too low for the pump to fully pressurize the system to trigger the cut-off. If you can, try it connected to shore power or a generator. it would be interesting to see if you still have this issue. As you can see from the attached chart, the running voltage you are seeing is pretty low.
Or you could simply run jumper cables from your car/truck battery to the trailer battery. If the problem persists, it is likely that the pump pressure switch is failing to cut the motor off. It looks like you could replace the switch by taking the black cover off the end of the pump.

Or as another means of diagnosis, you could take the end cover off and use your multimeter to see whether the switch ever opens. Set it on the 20v range and put the leads across the switch terminals. It will read 0v while closed (pumping) and 12v open (pump cut off).
__________________
Larry

Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently
Larry-NC is online now   Reply With Quote
Old 09-12-2019, 01:56 PM   #6
Senior Member
 
Join Date: Nov 2015
Posts: 482
Maybe check the filter to be sure it is clear. To me it sounds as if it is loading up, maybe having a hard time sucking water. A kink in a line or your system is building up vacuum.
Just my thoughts.
MtBiker is offline   Reply With Quote
Old 09-12-2019, 02:11 PM   #7
Senior Member
 
Join Date: May 2017
Posts: 4,618
Quote:
Originally Posted by Flybob View Post
Check your battery. It is possible the battery is starting to go bad ( 4+ yrs old if original) and that after running for a short time the battery voltage is too low for the pump to fully pressurize the system to trigger the cut-off. If you can, try it connected to shore power or a generator. it would be interesting to see if you still have this issue. As you can see from the attached chart, the running voltage you are seeing is pretty low.
Quote from OP. "Is there a pressure adjustment or does a solenoid need a squirt of WD40? It works fine when we have AC hookups instead of battery only."

TheWolfPaq82 is offline   Reply With Quote
Old 09-12-2019, 03:28 PM   #8
D W
Senior Member
 
D W's Avatar
 
Join Date: Sep 2016
Location: ALASKA (World's Biggest Campground)
Posts: 2,164
Quote:
Originally Posted by TheWolfPaq82 View Post
Quote from OP.It works fine when we have AC hookups instead of battery only."

↑ THIS ↑ If it runs fine under converter power there is nothing wrong with the pump. Start checking your battery (s), and connections.
__________________
'04 K3500 Silverado LS with LS3 Connect & Cruise- with Intimidator SSI PKG- Reprogrammed 4L80E
2016 Salem 27RKSS
1984 CHEV SCOTTSDALE K20 2GCGK24J0E1XXXXXX (Chevrolet Legends-Class of 2019)
"...exhaust fluid? We don't need no stinkin' exhaust fluid"
D W is offline   Reply With Quote
Old 09-12-2019, 03:59 PM   #9
Senior Member
 
Iwannacamp's Avatar
 
Join Date: Aug 2013
Posts: 7,307
I purchased an electronic battery tester on Amazon... kinda like the ones that used to cost a $1000. I think I paid about $30 for it. Seems to work fine. I know. I know. Any place will check your battery, but with 3 cars, 2 lawn mowers and an RV plus kids it will be handy+++ you can do it at home.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
__________________
2017 Puma 297RLSS
2005 Ram 2500 4X4 diesel SMOKER!!
I love puns, irony and tasteless jokes...
born in Texas.... live in Arkansas
Iwannacamp is offline   Reply With Quote
Old 09-12-2019, 07:09 PM   #10
Member
 
Join Date: Apr 2018
Location: NC
Posts: 56
Thanks for the input. Yes, it appears to be the internal pump pressure switch hanging in some way, battery, or the pump is just drawing more current than it should. As a reminder, it works good the 1st day of boondocking but then gradually gets worse over the next day or two. (I do not have solar nor a genny yet. Adding solar soon.)



Battery is only one year old but it is a simple marine deep-cycle (trolling motor type). The electrolyte in the cells looks consistent across all 6 cells at about 3.5 floating balls.


I'll do some more testing this weekend.
__________________
Outsider
Southern NC
Outsider is offline   Reply With Quote
Old 09-13-2019, 09:11 AM   #11
Senior Member
 
Join Date: Apr 2019
Posts: 169
Hello Hello

Quote:
Originally Posted by Outsider View Post
Thanks for the input. Yes, it appears to be the internal pump pressure switch hanging in some way, battery, or the pump is just drawing more current than it should. As a reminder, it works good the 1st day of boondocking but then gradually gets worse over the next day or two. (I do not have solar nor a genny yet. Adding solar soon.)



Battery is only one year old but it is a simple marine deep-cycle (trolling motor type). The electrolyte in the cells looks consistent across all 6 cells at about 3.5 floating balls.


I'll do some more testing this weekend.

So it is now September. What did you find? What was the result of your testing?
campers302 is offline   Reply With Quote
Old 09-13-2019, 09:46 AM   #12
Senior Member
 
Join Date: May 2017
Posts: 4,618
Quote:
Originally Posted by campers302 View Post
So it is now September. What did you find? What was the result of your testing?
The OP posted two days ago that he'd be doing more testing this weekend. That was Sept 11th. ????
TheWolfPaq82 is offline   Reply With Quote
Old 09-13-2019, 10:07 AM   #13
Senior Member
 
Join Date: Apr 2019
Posts: 169
Egg on my face.

Quote:
Originally Posted by TheWolfPaq82 View Post
The OP posted two days ago that he'd be doing more testing this weekend. That was Sept 11th. ????

I was looking to the left of the post and saw my join date and thought it was his post date.


Thanks
campers302 is offline   Reply With Quote
Old 09-20-2019, 08:03 PM   #14
Member
 
Join Date: Apr 2018
Location: NC
Posts: 56
There is no room around this water pump at all. Very cramped quarters. I had hoped to try adjusting the allen screw in the head of the pump but cannot get to it at all. Looks like I will have to completely remove the pump. (Not sure it is worth the time investment at this point.)



Anyone have an easy way to remove pressed on hose clamps on the hoses that get put on at the factory?
__________________
Outsider
Southern NC
Outsider is offline   Reply With Quote
Old 09-21-2019, 11:08 AM   #15
Senior Member
 
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 7,465
A lot of water pumps today are "bypass type". They have two adjustments, one that puts it in bypass mode and the other to totally shut down the pump at max pressure.

Before turning any screws make sure to get a copy of the pump manufacturer's instruction manual and follow the procedures for adjusting each.

FWIW, if a pump isn't receiving enough power (voltage drop in electrical supply) to reach shut off pressure it could operate just as you describe. The fact that it works fine when on shore power and converter is supplying power is to me a dead giveaway that the issue is power related, not pump adjustments.

Could be as simple as a loose connection along the line or a battery that is not providing sufficient voltage under load.
__________________
"A wise man can change his mind. A fool never will."

"Sometimes you're the dog, sometimes you're the tree"

2018 Flagstaff Micro Lite 25BDS
2004 Nissan Titan
TitanMike is online now   Reply With Quote
Old 09-21-2019, 11:14 AM   #16
Senior Member
 
Join Date: Jun 2012
Posts: 10,877
Quote:
Originally Posted by TitanMike View Post
A lot of water pumps today are "bypass type". They have two adjustments, one that puts it in bypass mode and the other to totally shut down the pump at max pressure.

Before turning any screws make sure to get a copy of the pump manufacturer's instruction manual and follow the procedures for adjusting each.

FWIW, if a pump isn't receiving enough power (voltage drop in electrical supply) to reach shut off pressure it could operate just as you describe. The fact that it works fine when on shore power and converter is supplying power is to me a dead giveaway that the issue is power related, not pump adjustments.

Could be as simple as a loose connection along the line or a battery that is not providing sufficient voltage under load.
X2
__________________

__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is online now   Reply With Quote
Reply

Tags
battery, pump, water, water pump

Thread Tools
Display Modes

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



» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 12:41 PM.


×