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Topic: SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual (Read 182 times) previous topic - next topic
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SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual

I uploaded the pdf 4008 manual.  I think this water pump is the most common pump LD is using.    As an aside check out the recommendations on winterizing. 

I for years carried a spare water pump just in case.   Last year my water pump was dying a very very slow death.   I happened to be within a few miles of the LD mothership.  Made an appointment.  As luck would have it they didn't have that model on hand or more likely  any spares.    They used the one I had. Only change labor - 1/2 hour in fact.  

It seems this pump is on sale on Amazon SHURFLO-4008-101-E65-Revolution-Water-Pump.  

After reading the install paper I  found you can buy the parts for a bit less -- ie $21 vs $60......
 Amazon.com: SHURFLO 94-800-00 Model 4008 Complete Housing: Automotive


glen

As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
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It's all good .......
2014 Twin King
Re: SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual
Reply #1 –
Quote from: colddog  - 
I uploaded the pdf 4008 manual.  I think this water pump is the most common pump LD is using.    As an aside check out the recommendations on winterizing. 

I for years carried a spare water pump just in case.  Last year my water pump was dying a very very slow death.  I happened to be within a few miles of the LD mothership.  Made an appointment.  As luck would have it they didn't have that model on hand or more likely  any spares.    They used the one I had. Only change labor - 1/2 hour in fact. 

It seem this pump is on sale on Amazon SHURFLO-4008-101-E65-Revolution-Water-Pump. 

After reading the install paper I  found you can buy the parts for a bit less -- ie $21 vs $60......
 Amazon.com: SHURFLO 94-800-00 Model 4008 Complete Housing: Automotive


glen
Thanks for these money-saving tips, Glen.

Chris
As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
Formerly: 2002 30' IB
Re: SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual
Reply #2 –
I'm fine with no spending unnecessarily on parts, but if the pump's motor is bad, replacing the housing(s) wouldn't  fix the problem. As far as I know, the lower housing contains a diaphragm/valve unit and the upper housing has a pressure switch and the check valve. If one of those component has gone south, then I can see just replacing the non-functional parts. But, what are the "tells" for what the problem is? A failed check valve or loose wires should be obvious, but how does one diagnose a bad motor (from a failed diaphragm or pressure switch) unless the pump is removed and examined?

Thanks for any information!  :)

2003 TK has a new home
Re: SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual
Reply #3 –
I suggest just changing the entire pump, if it goes bad. It greatly reduces the time needed to change out a pump.
The cost difference isn't great and many times a failed pump head has leaked water into the motor's bearings, damaging them.
Motors wear out too, with extended use.
Shurflo's 4008 is a good pump with a long life, ours has lasted many years, a nice improvement over the earlier variable speeds pumps that went bad regularly.  Carrying the same model pump, as installed, makes the replacement a much simpler job.

Larry
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
Re: SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP Manual
Reply #4 –
"I suggest just changing the entire pump, if it goes bad."
----
 Yes. ;) 
2003 TK has a new home