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HVAC, Air Conditioners, Aqua Hot, Primus, Webasto, Chassis Heaters, Furnaces and Water Heaters Questions and information about the wide variety of Heating and Air Conditioning as well as Water Heater systems available are discussed here.

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  #1  
Old 11-21-2016
JackandLiz's Avatar
JackandLiz JackandLiz is offline
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Location: Fulltiming USA
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Default CIRCULATION PUMP NEEDED!

Howdy, Y'all!
Here is what happened today:
1. Turned on Webasto system today.
2. Exhaust fan started and burner ignited.
3. Circulation pump working quietly.
4. After about 1 minute, burner turned off.
5. There is a small coolant leak where pump hose feeds into heat exchanger.
6. Heat exchanger housing gets very hot.
7. Burner turns off.
8. No heat felt at fans in kitchen nor in bathroom.

In our 1993 Wanderlodge, we have a Webasto Scholastic Series School Bus Heater. The coach formerly had a Primus system. It was converted sometime before we bought the Bird. Jack suspects that the pump is failing and wants to change out the coolant circulation pump and its' hoses. Can't get them directly from Webasto. Roger Berke can't help us either.
Any idea as to where we can find these parts? The bus has no heating and hopefully we have some time before the temperature drops to freezing.
Thank you,
Liz and Jack in Hondo, TX.
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Jack and Liz Pearce
Living Fulltime in a 1993 WLWB
Lone Star Corral SKP park
Dhanis, Republic of Texas
SKPs
Liz
CORRAL NEWS Editor
www.lonestarcorral.com
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  #2  
Old 11-21-2016
konehd konehd is offline
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Default

Maybe try one of the groco pumps?

http://www.groco.net/pumps.htm

BB used them for coolant circulation in many buses...

Get them pretty reasonable on ebay.


HTH, Joe
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'93 WB40, Alligator - Sold
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  #3  
Old 11-21-2016
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Mallie Lennon Mallie Lennon is offline
1995 WB 42’ Series 60
 
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Location: Eufaula
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That pump should be available. But I have a new Scholastic I took the burner and combustion cone from, and it has the pump. I will take $200+ shipping for the whole thing.
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  #4  
Old 11-21-2016
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JackandLiz JackandLiz is offline
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Default CIRCULATION PUMP NEEDED!

Quote:
Originally Posted by Mallie Lennon View Post
That pump should be available. But I have a new Scholastic I took the burner and combustion cone from, and it has the pump. I will take $200+ shipping for the whole thing.
Please send a photo of the pump. Do you also have the hoses for it, by any chance?

Liz
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Regards,
Jack and Liz Pearce
Living Fulltime in a 1993 WLWB
Lone Star Corral SKP park
Dhanis, Republic of Texas
SKPs
Liz
CORRAL NEWS Editor
www.lonestarcorral.com
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  #5  
Old 11-21-2016
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nbedinger nbedinger is offline
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I read this as the leak is on the webasto side of the heat exchanger.

But just to cover all the bases I'll nag that a small leak would take a long time to drain off all the radiator-circulating coolant, resulting in a very hot heat exchanger.
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  #6  
Old 11-21-2016
Mallie Lennon's Avatar
Mallie Lennon Mallie Lennon is offline
1995 WB 42’ Series 60
 
Join Date: Jan 2011
Location: Eufaula
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Quote:
Originally Posted by JackandLiz View Post
Please send a photo of the pump. Do you also have the hoses for it, by any chance?

Liz
Yes, it was a new scholastic, I pulled the burner, controller and combustion chamber out. Everything else is there. I will try to get pictures tomorrow.
Liz, send me an e mail and I will send the pictures to you.
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Eufaula, Oklahoma
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  #7  
Old 11-23-2016
mpierce mpierce is offline
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I had to put one in. School bus supply.
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Scranton, ND
"Smoke N Mirrors" Royale Conversion
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  #8  
Old 11-23-2016
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JackandLiz JackandLiz is offline
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Location: Fulltiming USA
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Quote:
Originally Posted by nbedinger View Post
I read this as the leak is on the webasto side of the heat exchanger.

But just to cover all the bases I'll nag that a small leak would take a long time to drain off all the radiator-circulating coolant, resulting in a very hot heat exchanger.
Yup. That was Jack's conclusion also.

Thanks,
Liz
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Regards,
Jack and Liz Pearce
Living Fulltime in a 1993 WLWB
Lone Star Corral SKP park
Dhanis, Republic of Texas
SKPs
Liz
CORRAL NEWS Editor
www.lonestarcorral.com
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  #9  
Old 11-24-2016
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JackandLiz JackandLiz is offline
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Default Turn Off Coolant Flow into Coolant Circulation Pump?

We are losing coolant. We are not moving and not using the Webasto for heating. We are waiting for parts, though. I was just wondering if there Is there some way to stop the coolant from flowing into the circulation pump?

Liz
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Regards,
Jack and Liz Pearce
Living Fulltime in a 1993 WLWB
Lone Star Corral SKP park
Dhanis, Republic of Texas
SKPs
Liz
CORRAL NEWS Editor
www.lonestarcorral.com
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  #10  
Old 11-24-2016
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isp2952 isp2952 is offline
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Quote:
Originally Posted by JackandLiz View Post
We are losing coolant. We are not moving and not using the Webasto for heating. We are waiting for parts, though. I was just wondering if there Is there some way to stop the coolant from flowing into the circulation pump?

Liz
They have special clamps for hoses, but a pair of vise grips will work in a pinch
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