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Generators In this forum we will try to answer any of your questions about the different model generators that can be found on Blue Bird coach's.

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  #1  
Old 05-10-2011
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Default Drain valve leaking

The coolant drain valve on my Kabota generator has started leaking.
I was going to replace it but I’m confused as to why Kubota would put such a cheap valve ( inside parts plastic ), on the motor that is vulnerable to damage or mischief.
What is it’s purpose?
And can I just plug it instead of trying to find the replacement part?
Pros and Cons please.
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Old 05-10-2011
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Sure,a plug is safer in my mind.
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  #3  
Old 05-10-2011
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I'am with Randy, Kurt. You can always remove the plug if you need to drain the engine.
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Old 05-10-2011
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Well I now know how much a new motor costs about $3500
But I can’t find a plug to fit.
Local Kubota dealer couldn’t even find my engine model on their computer
I think I’m going to cut off the valve part and weld it up.
The Internet search isn’t going well and parts for a V1903 are difficult to find
I did find a Kabota 03 series shop manual online.
http://www.kubotabooks.com/AutoIndex/index.php?dir=Engines/&file=03%20series%20engine%20%20Workshop%20manual. .pdf
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Old 05-12-2011
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My drain seeps until I run the genny some and heat things up. Then it stops for a while and just sits. Eventually I'll have to change it, but it's not a big issue right now. It sure looks liks a standard pipe plug, albeit metric, would fit just fine. What's different about yours, Kurt?
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Old 05-12-2011
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John,
It's 17 mm in diameter by 20 threads per Inch. MOL + or -
I went to 9 shops in Huntsville Ala yesterday, Most supply houses had 16mm and then jumped to 20mm with nothing in between, finally Kubota had a close match. I did use liquid Teflon thread sealer on the plug adapter side, but in another application it failed just today on a well and cistern system here at the farm, So I'm guessing it may leak after awhile. Although it doesn't have the 90psi on it like the cistern so it may just hold.
Three Kubota tractor and equipment dealers had no idea what motor a V1903 is. It's an old series 03 but they still had no clue with the model # and serial #'s. Last owner had a new generator put in back around 02-03. It's a 17.5 kw Pancake with a Kubota motor, so it may not be the same as yours
I hope I don't jinks myself here but Kubota is a fine engine until it breaks then boys hike up your slips cause it's going to a pain in the back side when it does. This is my second Kubota product, the first was a diesel lawn tractor, 2 Cly. great mower, until it ate the motor. rebuild price $2500.00 8 years ago. It lasted two hours and blew again. I sold it, just after the dealer rebuilt it the second time. Been using a yard service ever since, one of the smarter things I've done.
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Old 05-12-2011
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Kurt,
Mine was leaking last year. Took it off went to home depot found a brass plug problem solved. No leaks
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Old 05-12-2011
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Is it this?



If so remove the adapter part from the block. If memory serves me right, which sometimes... it don't it should be a pipe thread. Sounds like you removed the bleeder section only?? and trying to find a fit for the adapter?? Take the adapter/reducer what ever you want to call it out ...
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Old 05-12-2011
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Here it is I found it. Hope this helps.

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  #10  
Old 12-09-2012
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Quote:
Originally Posted by Somervillebus View Post
Is it this?



If so remove the adapter part from the block. If memory serves me right, which sometimes... it don't it should be a pipe thread. Sounds like you removed the bleeder section only?? and trying to find a fit for the adapter?? Take the adapter/reducer what ever you want to call it out ...
Quote:
Originally Posted by Somervillebus View Post
Here it is I found it. Hope this helps.



I'm having the same problem with the block drain on my Kubota/Powertech and rather than using just a brass plug I would like to replace the drain with a brass drain petcock like this one so that I can still drain the block when needed, does anyone see a problem with doing this.

Drain Cock-Brass-1/4 Inch NPT by Dorman - Help (part#61106) / Radiator Hardware http://shop.advanceautoparts.com/buy...-hardware.html#

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