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Author Topic: Kubota Gen set  (Read 3182 times)
muldoonman
1991 Prevost 8V92TA
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« on: August 29, 2011, 06:59:55 PM »

My kubota V1902-b 15 kw gen set will die upon reaching around 195 degrees. Let it cool down and will fire up to around that temp and down again.The blower is putting out a lot of air out bottom. Water/  antifreeze is full. The  engine is in a totally insulated box with exhaust, wrapped in insulation. Gonna change out the thermostat this weekend.  The gen set has 51 hours on it. Any ideas?
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bobofthenorth
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« Reply #1 on: August 29, 2011, 07:05:58 PM »

How confident are you of that shutdown temp?  I'd use an IR thermometer to confirm it before I went any further.
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R.J.(Bob) Evans
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wal1809
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« Reply #2 on: August 29, 2011, 07:09:10 PM »

My Kubota shuts down at 220 degrees.  I think the last response was a good one to find out exactly what temp your at for shutdown, then go from there.
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1984 Silver Eagle Model 10 6V92 Allison auto tranny
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muldoonman
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« Reply #3 on: August 29, 2011, 07:12:02 PM »

Is that a point and shoot kind of thing? The gauges are on the dash. Sunday it was a cool 108 here outside of muldoon tx. The 8V92 was around 195 degrees on our little trip but the gen died and I haven't got the coach air fixed. Can you say, Hotter than a Firecrcker!
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luvrbus
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« Reply #4 on: August 29, 2011, 07:38:54 PM »

That one is probably going to be the shut down on the side of the pump those open with 12v and the 120v holds it open, disconnect the wire from the sensor shut down if it shuts off you know the shut down solenoid is bad, their cheap to replace only 275 bucks welcome to the bus world lol 
Check the ground first and also make sure the rod has play if is is to tight it will shut down call Jason or Dick at Wrico and get you the instructions on how to adjust the shutdown.
I have those but no way can I post it here 

good luck
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muldoonman
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« Reply #5 on: August 29, 2011, 07:59:19 PM »

Thanks . I'll check this out. I like that welcome to bus world ownership. The only good thing is my lovely wife is not mad yet with the project. With what I have spent since I bought my baby, That $275 will be like a tip.

Glen

« Last Edit: August 29, 2011, 08:01:51 PM by muldoonman » Logged
TomC
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« Reply #6 on: August 29, 2011, 08:10:26 PM »

Doesn't sound like the thermostat, but the shut down sensor should activate, as previously stated, at around 220 degrees.  You might also consider an additional squirrel cage blower to create a bit more circulation through the box.  Good Luck, TomC
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eddiepotts
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« Reply #7 on: August 30, 2011, 09:50:45 AM »

Being the gen set is new it makes me think back what Clifford said about the air bubble in another post. How are you sure that the coolant is full. I would recomend measuring the amount you put in or finding a way to burp your engine. I know when I changed my coolant in mine I could only get one gallon in the radiator. After I got it to burp it took a total 3 gallons. I also know on the kabota site it said something about the type of coolant. I tried to find it but no luck yet. It did say one type would not carry enough heat away from the engine. If you go here you can get some info with your serial number. http://www.kubotaengine.com/index.html
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muldoonman
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« Reply #8 on: August 30, 2011, 10:34:26 AM »

Eddie, The gen set was in a 1991 prevost coach I bought that had been sitting for years. The gen set had 38 hours when I bought it a couple months ago. The bus 56,000 miles. I'll check the easy stuff first and move on from there. Is there any companies you all know in the Houston, Austin or San Antonio area that works on these. The blower is blowing out bottom but where kubota is located it's sealed with radiator in a area by itself. You can't see it but it has access panel that can be removed by screws. (Dallas where are you when a guy needs you!) LOL

Glen
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bigjohnkub
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« Reply #9 on: August 30, 2011, 10:54:33 AM »

Your Kubota Engines A merica dealer is M.G. Bryan in Dallas. Ph. 214-631-9787. Ask for John Gerron, mention me. He will give you a list of nearby Kubota repair facilities. Ask where he would take his.

Big John
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Big John  Tyler Tx PD 4903-188 & 4107
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wal1809
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« Reply #10 on: August 30, 2011, 11:38:12 AM »

Before you go to a shop we can probably figure this out right here on the forum. 

The air pocket we were talking about before is in the water necks at the highest point of the little engine.  I could not get the air out until I loosened the clamp ont he rad hose while it was running and slowly opened it until I got a steady stream of water coming from the hose (hose still clamped to the water neck).  Just loosen it enough to let the air and a little water out.

Is you radiator cap higher than the water neck on the genset?

What kind of blower do you have blowing the air out the bottom?

How much air flow is allowed coming out of the bottom?

I ask these because I just got through fixing mine with the remote mounted radiator.  I was traveling in the same temp as you were as I was on Hwy95 north of you.  I never got over 180 on the gen temp.  OH and yes it is hotter than a firecracker.  I got dizzy training dogs in Troy, Texas.  At one time I really thought I was going to hit the ground.  I just sat down in the shade and drank some water.  People ask me all the time why I want to move to Alaska.  My answer is "Go outside for a little while, you will see".
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1984 Silver Eagle Model 10 6V92 Allison auto tranny
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bigjohnkub
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« Reply #11 on: August 30, 2011, 01:37:23 PM »

Wall, I agree, but he asked for service info. I did not want him to go to BillieBob"s and get ripped. You and I have to bump into each other . We travel a lot of the same area.
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Big John  Tyler Tx PD 4903-188 & 4107
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wal1809
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« Reply #12 on: August 30, 2011, 03:22:35 PM »

I would like that very much!!
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1984 Silver Eagle Model 10 6V92 Allison auto tranny
www.snakebreaker.com
muldoonman
1991 Prevost 8V92TA
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« Reply #13 on: August 30, 2011, 03:32:45 PM »

Wayne, The filler is higher than the thermostat housing. It's in a tight spot back inside coach. I don't really know the flow of air but it will kick up dust. Thanks, Big John. I will try and get in touch with them tomorrow. 'Thanks for all the help Guys.

Glen S.
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wal1809
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« Reply #14 on: August 30, 2011, 04:03:29 PM »

I actually thought about using a larger car radiator instead of the little generator radiator.  But it has worked for me so far and the real test was last week.  109 and the little radiator did just fine.
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1984 Silver Eagle Model 10 6V92 Allison auto tranny
www.snakebreaker.com
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