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Old 10-22-2008, 04:01 PM   #1
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After 2.5 years, my 5.7 gave up the ghost. The motor got so hot that I could not touch it. I turned off the pump to let it cool down but as soon as it was back on, would run only for a few moments before quitting. Fortunately, it was replaced under warantee.

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Old 10-22-2008, 04:01 PM   #2
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After 2.5 years, my 5.7 gave up the ghost. The motor got so hot that I could not touch it. I turned off the pump to let it cool down but as soon as it was back on, would run only for a few moments before quitting. Fortunately, it was replaced under warantee.

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Old 10-28-2008, 03:55 PM   #3
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Last week a new Shureflo 5.7 was installed. It worked for 24 hours then failed while I was BLM camping in the desert near Borrego Springs. Is that Murphy's law? Water pump failure in the desert? Fortunately, our camping friends had a rig with a pump that worked. We were just busy transferring water from their rig to mine! Oh, at least we had a lot of beer!

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Old 10-28-2008, 04:22 PM   #4
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sdcyclist,

Was the running voltage to the pump checked? WRV's wiring is not up to the requirements for the new (5.7) pump. The other concern would be loose wire connections, as noted in many other posts. Low voltage at the pump can cause overheating and failure. I still would be suspicious of the "new" pump due to it's short life.
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Old 10-28-2008, 04:54 PM   #5
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The water pump is one place where a failure makes a real mess of motorhome use. For years I've carried a spare pump. After picking up the 08 last year, I bought the flex tubing kit @ CW & installed the spare pump next to the main pump. Now I can wire/plumb in the spare to obviate a 5.7 failure in about 15 minutes. If you don't pack a spare, I'd suggest doing so. If you dry camp or live off the house pump (I do to take full advantage of the Vagabond RO whole house purification system), I'd have it installed for a minimal change-over just in case.

That's my 1000th post. Guess you get one campfire for each 200.
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Old 10-28-2008, 07:53 PM   #6
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Congratulations Mike, I am struggling to get to 500. By the way it is:

posts = "campfires"
10 = 1
75 = 2
250 = 3
500 = 4
1000= 5
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Old 10-29-2008, 04:03 AM   #7
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Dale,
What gauge wire does the 5.7 require. My 5.7 is almmost 4 years old and has never worked well unless I am on shore or generator power.
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Old 10-29-2008, 11:27 AM   #8
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The best way to wire these new high output pumps is to run an 8 or 10 gauge fused wire [20 amp] from the coach batteries to a 30 amp relay at the pump. Use the origonal pump wire to power the relay. Also, ground the pump to the coach frame close to the pump and the factory ground wire. The reason for this, on most coaches there could be as much as a 2.5 volt drop in voltage at the pump. That is wye it works when you are plugged in. The inverter raises the voltage about 2 volts. have fun Rick
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Old 10-31-2008, 10:37 AM   #9
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Indeed, wiring was the problem. With the pump on but no flow, the voltage was 12v, as soon as a spigot was opened the voltage fell to 8v. Now, I have a heavier guage wire installed with a straight run from the batteries.

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