Used Kubota Motor - what to look for?

NetMagi

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Planning on taking delivery of a 1999 ex-Ingersoll Rand light tower today that had the lights stripped off at some point, and has just been used for backup power by the present owner.

Hour meter reads ~400 hours. Seems REALLY low for a 99, especially if it ever really did duty as a light tower. . but I guess anything is possible.

I'd be buying it as a backup power gen.

It's got a D905 in it.

My familiarity with the little 3-cyl Kubota's is limited to what I've learned maintaining the 902 in my 25D, which hasn't needed anything other than routine maintenance.

I'll have a limited amount of time to check this thing out before I have to hand over the cash. Obviously taking the head off and looking for wear isn't feasible.

Assuming I have 15-20 minutes to start it up and check it out, what things would you check/look at to try and make sure it doesn't have one foot in the engine grave? :)
 

85Hokie

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Planning on taking delivery of a 1999 ex-Ingersoll Rand light tower today that had the lights stripped off at some point, and has just been used for backup power by the present owner.

Hour meter reads ~400 hours. Seems REALLY low for a 99, especially if it ever really did duty as a light tower. . but I guess anything is possible.

I'd be buying it as a backup power gen.

It's got a D905 in it.

My familiarity with the little 3-cyl Kubota's is limited to what I've learned maintaining the 902 in my 25D, which hasn't needed anything other than routine maintenance.

I'll have a limited amount of time to check this thing out before I have to hand over the cash. Obviously taking the head off and looking for wear isn't feasible.

Assuming I have 15-20 minutes to start it up and check it out, what things would you check/look at to try and make sure it doesn't have one foot in the engine grave? :)

Since you are in the colder climate - check the glow plugs and see if all of that works, will engine start and run well after a 30 second glow? Any smoke after 10 seconds? Run through the throttle workings- let is get warm a bit and then throw it up to full throttle, any smoke? Bring it back to idle. Still purr?

If you dont mind me asking - what are you paying for it?

You get the generator with it??? If so - hellva tool for a lights out situation!:)
 

North Idaho Wolfman

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Look at the vent tube for the valve cover, if it's puffing out of there, it's going to need a rebuild soon as it has some blow-by (worn rings, pistons, cylinders, and/or valve guides.
Check the oil for condition.
Make sure it's cool and pull the radiator cap and run it with the cap off looking for bubbles, (leaking or blown head gasket)
Listen for any unusual knocks.
 

Daren Todd

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Some of the ingersols don't use a an electric fuel pump and can be a bugger to prime after changing out the fuel filters. And usually won't start with out glow plugging it. Since it has the d905 motor, then I would say it's one of the smaller units so don't expect it to power your whole house. I've had them hooked to campers, and they usually would handle a small heater or ac unit, a microwave, a few lights, and tv with satellite dish. Usually would trip a breaker if they were using microwave and had the heater/ ac kick on.

Check the hour meter again. Meter usually only goes to 9999.9 on the older units. So if it's showing 400 hours on the meter your actually looking at either 10,400 or 20,400 hours, ect. Or the meter hsd been replaced once or twice. I highly doubt someone bought it brand new and stripped the mast and lights off ;) You can have a whole home generator installed a couple times over for the price of one of those baby's.

Fire that baby up and actually let it run for at least one hour. If the owner shy's away from letting you do it, or only will allow it to run for a minute or two, then walk away. Chances are it's got a shut down issue, or over heats.

Inspect the radiator really well. Look for signs that it's clogged. Bug guts slung over the inside of the doors is a good clue. For some reason moths absolutely love light towers. And a clogged radiator will cause it to shut down do to temp.

Take a flat head and phillips screw drivers and some metric wrenches with you, and open up the control box. Where the key switch and breakers are. Start the unit and kick the breakers on and off. Check for arking and sparking. Look for burnt wiring as well. Just be careful to keep your hand out of there so you don't get barbequed ;)

Take a mirror and flash light with you and check the coolant in the radiator. Look for oil floating in it.

Check the exhaust as well. Look for signs of over fueling, (exhaust smells like raw diesel) and forms a thick cloud. Look for signs that it's burning oil. Excessive smoke and running funny could be sign of a spun bearing.

With it being a light tower first, I can almost guarantee that it didn't recieve regular routine maintenance. It's almost impossible to do if it's on the side of the high way. They usually get serviced when they come off a job. So it would depend how long the job went for. Most of the time they forget to check the hours to service due. Could have regularly gone 1000 plus hours between oil changes.

And lastly, if you find that it actually has only 400 hours on it, then you need to run away from it. Chances are good that it was stolen at some point :eek::D:rolleyes:
 
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NetMagi

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Look at the vent tube for the valve cover, if it's puffing out of there, it's going to need a rebuild soon as it has some blow-by (worn rings, pistons, cylinders, and/or valve guides.
Check the oil for condition.
Make sure it's cool and pull the radiator cap and run it with the cap off looking for bubbles, (leaking or blown head gasket)
Listen for any unusual knocks.
When you say "vent tube for the valve cover", is that the "crankcase breather"?
 

North Idaho Wolfman

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When you say "vent tube for the valve cover", is that the "crankcase breather"?
Yes, that is what I meant. :eek:
A lot of models will have a piece of hose attached to the valve cover that goes down the side of the block.
 

Daren Todd

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One other thing to look at on it. If it has a bus bar semi exposed some where near the control panel where you can tie in heavy gauge wires. Should have screw terminals that take a 3/8 or larger allen head. Should be labled "g", "n", "r", and "b" or labled 1-4, with a sticker labeling what they go for. Then it is a heavy duty model, and that bus bar is a direct connect to the gen end :D it means it has at least a 20kw gen end and can more then likely power your whole house :D If it just has a 110 outlet and 220 outlet, then your limited by the breakers as far as what you can run off it.
 

Tooljunkie

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My two cents-feel it to make sure it hasnt been recently started. Check oil and coolant levels. Pull oil filler cap and look for moisture. Overall condition of engine rad and belt. Engine mounts if they are falling apart is signs of a high miler. Dont know much about light plants, likely repurposed from an auction or something along that line.

Good luck, hope it works out for you.
 

rentthis

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I have a couple of the same unit. I used one of them for home power after our latest 50 year ice storm. Don't expect it to run much. They are only 5kw. I ran some lights, the fridge, the tv and an electric blanket. The advantage to it over a gasoline unit is that it will run forever on a tank of fuel. We lose power here to hurricanes. Several of my neighbors have propane powered standby generators that run most of the house. If price isn't a problem, that's the way to go.A few days of drop cords and limited power is a PITA.
 

NetMagi

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So. . I ended up buying it.

Was pretty comical series of events actually, as buying and selling used equipment usually is.

Guy shows up with generator in tow, and he seems like a nice guy.

I give it a good look and the cabinet is rough, but inside it's just dirty. There's a thick layer of dry brownish dust/dirt on everything in the inside that would be consistent with sitting in someone's barn for a long time. The control panel shows no wear and tear, and the hour meter reads ~380 hours. He goes to start it, and nothing, won't turn over.

We hook up another battery and after messing around with the loose terminals for 5 minutes or so, we get it to crank, and it fires up pretty quick. Runs real rough for the first 5 seconds or so with some white smoke, and then it smooths out and purrs with zero smoke. I put my finger down under the crankcase breather, and there's no signs of pressure or suction and no smoke/oil coming out. I figure ok, not bad.

Pop the rad cap and coolant is clean, and no bubbles while running. We shut her down, I check the oil, and it's black, but it's not milky or contaminated.

The unit has a 25A twistlock and a 110v 15A duplex outlet. Not having a breakout to plug into the twistlock, I plug an air compressor into the 110v outlet (which I know is a BIG load) to see how it copes. I know it's under 15A running, but probably pulls more than that starting up. So, I connect it (with a clampmeter around the hot leg on the cord), and I see a 23 amp draw on the meter momentarily, but can't hear the compressor running. I run into the garage to check, but it's not running. I figure ok, the momentary starting amps on that is just too much. I try my table saw, but before I even get to try and turn it on I hear the guy screaming from the driveway "fire" "fire" "fire". I keep not one, but two extinguishers in the garage :) :), and came running out with one of them to find a small fire behind the control panel. One quick squirt into the control panel (dry chemical extinguisher) put it right out, and upon inspection, there was "something" that was no longer recognizable connected between the 30A twistlock and the 110v outlet that was barbecued beyond recognition. No other damage was visible.

We agreed on $125 off the asking price since it would clearly need a little rewiring now, and the battery was "questionable".

Upon digging into the damage later, what was barbecued was the 15A push to reset breaker. It had burned and arc'd to bits, so my guess is that either the contacts inside the breaker were dirty and the resistance heated it up to the point of combustion, or it was "stuck" in the reset position, and even though the load was exceeding 15A, it couldn't trip and failed.

Pros:
*Radiator doesn't leak and looks in really good shape. No crap in the fins
*Runs really smooth after the first 5ish seconds from a cold startup
*Has an electric fuel pump, and it looks like it was likely added. There's nothing connected to the fuel pump on the block.
*30-gal fuel tank that looks to be in good shape and its clean on the inside
*HEAVY-duty trailer with decent looking tires
*no visible oil leaks, and motor looks like a good washing would leave it looking almost new
*hours MIGHT actually be accurate. 380ish hours is hard to believe, but looking at it, if I had to pick 380 or 10,380, I wouldn't believe 10,380 either.

Cons:
*Fuel leak on the fuel line running from pump to the injectors, already ordered a 25' spool of 3/8 fuel line ($22 amazon)
*Probably needs a new battery. I charged the existing one overnight, and it reads good, so I guess I won't know till it sits a bit and either does or doesn't hold a charge
*needs a new 15A breaker if I want a functional 110v outlet
*had a pintle hitch rather than my preference of a ball hitch, already ordered a 1 7/8 coupler for the 3" channel to convert it ($15 amazon)

I'm wondering if maybe the rough startup could be related to the fuel leak. When you shut it down, you can hear hissing at the leak in the fuel hose, so it's probably losing part of it's prime, or at least maybe getting some air bubbles in there.

Thank you all again for help on what to look for. I wish I would have had more time to toy with it before having to make a decision, and been able to run a nice long "loaded" test, but that'll have to wait until I replace the fuel line and wire up a break-out for the twistlock.
 
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North Idaho Wolfman

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*Fuel leak on the fuel line running from pump to the injectors, already ordered a 25' spool of 3/8 fuel line ($22 amazon)
I do hope you mean from the fuel pump to the injection pump! ;)