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Re: Water Pump Replacement Assistance

My fresh water pump started leaking and making all kinds of noise on my 99 U320. The pump is a Flojet 2840 with the accumulator tank mounted on the same pad. I believe  I can just replace the pump ??  However, i do not see the flojet 2840 sold separately  without the accumulator. The older Flojet 2840 label states 4.5 gpm and 40 psi pressure.    Is there another pump that will adequately replace the existing pump without alot of modifications?  I have read prior posts discussing a shurflo 4008 or the 4048.  Do either of these work with the accumulator tank ? The 4048 lists as 4.0 gpm and a 55 psi cutoff . I do not know if this is compatible or not?  Any assistance would be greatly appreciated.
Chuck Wiggy
Coloma, Wisconsin
Sold my 1999 U 320 40 Ft. M11 450 hp
Build # 5468
2009 Silverado

Re: Re: Water Pump Replacement Assistance

Reply #1 –
I used the Shurflo and works fine. Even the mount holes worked. Just pick one with the gpm you want and buy it on line if not in a hurry. My existing fittings also worked.  However I replaced a Shurflo with a different Shurflo pump but the gpm is your key
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Re: Water Pump Replacement Assistance

Reply #2 –
Have you checked your accumulator to see if it's any good. I replace the whole thing 8 years ago all is well. Search for Flo Jet deck wash down system. Additionally there are any number of options.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Re: Water Pump Replacement Assistance

Reply #3 –
How would I go about checking the accumulator?  Would I just see if it releases any air when pressing in the valve?
Chuck Wiggy
Coloma, Wisconsin
Sold my 1999 U 320 40 Ft. M11 450 hp
Build # 5468
2009 Silverado

Re: Re: Water Pump Replacement Assistance

Reply #4 –
Chuck, very briefly depress the air valve on the end of the accumulator.  If air escapes, you are good.  Might want to check the air pressure which Brett Wolfe has posted the correct pressure several times.  My memory is a few pounds above the cut in pressure of the pump.

If water escapes the valve, replace tank.  My tank works great for me for years.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Re: Water Pump Replacement Assistance

Reply #5 –
When checking the accumulator.  you may need to depress the valve for 3-6 seconds.

The first time I checked mine.  I just pushed for a second and just air came out.  I thought it was ok, but pressed again for a few seconds.  Water came out the second time.
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: Re: Water Pump Replacement Assistance

Reply #6 –
Ok, Steve.  Rudy. Hope all is well. Thank you both.
Chuck Wiggy
Coloma, Wisconsin
Sold my 1999 U 320 40 Ft. M11 450 hp
Build # 5468
2009 Silverado

Re: Water Pump Replacement Assistance

Reply #7 –
Chuck,
I replaced my pump with the
SHURFLO REVOLUTION
WATER PUMP
3 GPM - 55 PSI
SUPER QUIET

The pump is very quiet, great flow and pressure and no pulsating, no accumulator tank.  Was purchased through PPL.
John M.

SHURFLO REVOLUTION WATER PUMP-3 GPM-55 PSI-QUIET|86-8398
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."
 

Re: Re: Water Pump Replacement Assistance

Reply #8 –
I put 25 lbs in my accumulator
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.