Water Pump Cycles - Luxury Coach Lifestyles
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Old 05-08-2013, 01:21 AM   #1
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Default Water Pump Cycles

My water pump cycles for about a second every 30 or 40 minutes... I am not finding any water inside the coach or outside... is this normal???

1977 Newell Classic
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Old 05-08-2013, 01:28 AM   #2
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Is there a check valve on the pump output side?


If Ain't a Newell, It Ain't Wurt Oonin!
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Old 05-08-2013, 01:54 PM   #3
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The pressure sensor, probably in the pump itself based on the vintage of your coach, is detecting low pressure and turning the pump on. If there are no external leaks then I would think the one-way valves in the pump are leaking. The pump in my 77 coach required the valve replacement kit to solve this same symptom. You can even buy a whole new pump head if the motor is fine.
Jon and Alie Kabbe
Started with 77 Coach
Now have 39' 93 coach
2007 civic toad
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Old 05-08-2013, 02:43 PM   #4
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Yes, it could be the pump and there is an easy way to check. Bypass the Plumbing and just run a short length of hose direct from the pump and plug it. If the Pump sill Cycles then it is at fault, Hopefully it is a SHURFLO because they are very reliable and Parts are readily available, if not then these are around $100.00 or so (AMAZON).
Now if the problem is in the plumbing use some Food Coloring, I suggest Red or Blue NOT YELLOW! for obvious reasons. You would be surprised how easy this makes finding a leak.
Good Luck!
have Coach will Travel
Steve & Tricia
1982 Newell 38' (built before #1) 6V92 DD, 5 Speed Allison, 12.5 KW Kohler, Couch used to make into a Bed but I fixed it!
2007 Yukon, 1981 CJ7 Laredo, 2002 Honda CRV, 1955 Thunderbird, 1952 Pontiac Sedan Delivery, 1952 Ford 8N, 1958 Airstream, 1959 Glasspar 16' Avalon, Cabin in the Woods........what will I work on next
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Old 05-08-2013, 03:22 PM   #5
Chester B. Stone, Jr.
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An air pocket in the system can cause this if the check valve is OK.
2001 Newell #579
tow a 2011 Honda Odyssey
1935 Mercedes 500K replica
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Old 05-09-2013, 01:59 AM   #6
Newell Attack
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I had this happen about a year ago. Drove me crazy! Finally changed out the water pump and that fixed the problem. I surmised that it was the internal check valve in the pump that was allowing the pressure to bleed back into the water tank.
1978 39 FT. Newell Classic

Jeff & Leann Shackly
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Old 05-09-2013, 04:44 PM   #7
Newell Boss
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Does your coach have an accumulator tank in the water system? If so, it may have lost the air in the bladder causing the pump to be more sensitive to pressure changes.

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