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adondo's avatar
adondo
Explorer
Apr 21, 2014

Shurflo Smart Sensor 5.7 repairs

So... I've owned the Safari for 9 years, 9 months and 6 days. About 2 years in, I upgraded the water pump to a Extreme Series Smart Sensor 5.7, a.k.a. model 5900-211.

The pump that I bought new from an RV supply, is dated 9-04. The math doesn't work out for having a decade old pump other than the SOB's sold me a 5 year old NOS (new old stock) pump in the first place. You cannot get parts for 5.7 pumps built before 2006. NATURALLY! :M The pump head is different.

While getting it ready for the year, I find a leak, and it's from the pump. I pull it, and it's the pressure transducer that's spewing from a vent hole.

After calling Shurflo, Honeywell, etc., and boiled my research down to this part: ($29.71)
Honeywell transducer part number 24PCFFM6G Digikey is a place my company orders from all the time, and it's trusted. They are here and there for a few dollars less, but I'd rather get one from a good source.

Hopefully, this will help someone deciding to spend $300 to replace a spewing pump when the little transducer has gone bad and can't otherwise be fixed. And, by the way, my pump won't run either, so it's bad electrically as well.

I'll post photos of the repair and tear down later.

Here is what the transducer looks like:
  • SCVJeff wrote:
    I gave up after two..

    Good luck!


    You mean you've gone down this road?

    I've read about these pumps dying like flies on a No Pest strip. Of course, all that reading was AFTER buying this pump. And, then I get one that's a pawn-off of a dusty warehouse antique.

    I guess I'm lucky, I went about 4 years until it croaked. I figured a $30 experiment beats a new pump, but next time, I'm thinking replace the whole thing.
  • A lot of people have had problems with that pump.
    OTOH, Mine has been perfect for 10 years and even survived running dry for two days.
  • Scott is the exception to the rule I think. My 1st one ran for about 4 years IiRC, then wouldn't shut off (likely your problem?). Fortunately that was in Quartzsite so there was no shortage of replacements. The second time was a year or two later and the company swapped it with a completely different pump that I hated so much I replaced it with a FloJet. All better now...
  • Got the transducer today.

    Here it is in the pump head.


    Inside the head, the nut holds it in place. There's an O ring on the transducer itself for sealing.


    Side view of the new one. I haven't put the O ring on it yet.


    The old one taken apart. The threaded part is just a mechanical piece, the other is the transducer itself. The little rubber square is the remains of the membrane. That's what croaked and made it leak from the vent hole that leads to the air side of it.


    I've tested the reassembled pump by blocking one side with a finger and sucking on the inlet to see if it holds the vacuum with my tongue. (Valid scientific testing :B ) It does, so it's going back in tonight. And, it runs now. (Bench test) It must have "thought" the pressure was high and never turned on the pump, that's why it never ran either.

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