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Old April 28th, 2013, 10:19 AM   #1
Haggar
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Default Any tune-up stuff for diesel that has sat for a few years?

I recently got a different tractor, a Kubota L-series with a 2.2liter 4 cyl 43hp diesel. It used to belong to my Grandpa, who passed away about 5 years ago. Since then, its just sat in his garage.

It was previously used before he got it, and seems like used hard (guessing commercial, compared to home use, just seems kinda beat up). Has about 700 hours on it.

Got it started, and its all working, but seems to be running a little rough, and to me, seems a little low on power, compared to what I expected, in the mid and high range gears, driving up inclines. (We have a 29hp diesel B series and 32hp diesel L series, all are hydros, so I have decent comparisons). And running a touch rough. It does have bigger tires, so maybe the weight of the tires is sapping some power. Haven't checked if they have chloride water in them.

Any tips for tune up stuff? Seafoam in the fuel? Guessing that a new fuel filter is in order. Don't know too much about diesels, honestly. Our other Kubotas are lower hours and run perfectly.
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Old April 28th, 2013, 10:20 AM   #2
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In before someone recommends changing the spark plugs.
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Old April 28th, 2013, 10:32 AM   #3
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In before someone recommends changing the spark plugs.
Flush the fuel system out and install a new filter. Add some CRC Fuel Therapy or CRC Guaranteed To Pass cleaners. It'll take a while to fully run through but you should notice a positive change in power.
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Old April 28th, 2013, 10:36 AM   #4
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When I worked at the kubota dealer we always drained all the full and changed the fuel filter. That was always first and foremost. Kubotas are famous for water in the tank. We used Kubota brand fuel additive but I really like power service brand. Get the gray bottle and add it to the fresh diesel. Something you probably know, only buy diesel at a busy station. We had lots of lakers buy shit fuel from the little lake stores. If I can help with anything pm me.
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Old April 28th, 2013, 11:19 AM   #5
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Fresh fuel and fresh filters. If it still seems rough after a bit pull the injectors. Have new nozzles put in and have them pop tested.
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Old April 28th, 2013, 11:53 AM   #6
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make sure to clean the sediment bowl, change filters, flush fuel tank and put in some cetane booster and Diesel 911 aditives.
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Old April 28th, 2013, 12:26 PM   #7
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make sure to clean the sediment bowl, change filters, flush fuel tank and put in some cetane booster and Diesel 911 aditives.
Diesel 911 is a power service additive. It's their cold weather additive. The silver bottle is a cetane booster along with a "cleaner". Also that tractor doesn't have a sediment bowl really. The cup with the filter in it does not collect much of anything, at least the couple thousand I have saw didnt.

To each their own but I don't use diesel 911 unless there is actually gelling going on. Which anymore is super rare. Knowing that the silver PS stuff has a water dispersant and boost cetane I highly recomend using that. As I stated eaelier kubotas are very prone to water in the fuel.
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Old April 28th, 2013, 02:05 PM   #8
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I would avoid the 911 as well. 911 contains alcohol.

If it has sat for a while with water in the fuel there is a good chance it has mold in it. A biocide would be better than the 911. Cleaning the tank may not hurt either.
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Old April 28th, 2013, 02:08 PM   #9
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Cool, thanks for the tips. I would suspect its early 2000's? (grill is off, to access the dead battery). I think its an L4310, hydrostatic drive, LA682 loader, and a 7ft rear blade.

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Old April 28th, 2013, 02:53 PM   #10
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Nice tractor. I assume you know the importance of taking care of the hst and using proper fluids.
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Old April 28th, 2013, 02:54 PM   #11
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Crc cleaners are just that, cleaners. I'd go for a good overall cleaning and then use a power service additive. (I do frequently use power service as well, but not as an outright cleaner, it just does not work as good.)
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Old April 28th, 2013, 02:57 PM   #12
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I would recommend putting some REVx in that thing. I thought it was snake oil until I used it on my f250.. that shit is incredible.
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Old April 28th, 2013, 02:58 PM   #13
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once you get it running good add some 2 stroke engine oil to the fuel. 1 pint per tank. i've heard from alot of diesel guys that the added lubricity helps the fuel injectors. ULSD is no where near as oily as the old diesel fuel, and can cause the injectors to bite the dust prematurely.
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Old April 28th, 2013, 03:00 PM   #14
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Quote:
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Nice tractor. I assume you know the importance of taking care of the hst and using proper fluids.
In general, yeah, but I need to learn a bit more now that its actually mine, not one of my dad's (He has a B and an L hydro, which usually I have one at my place). I used to operate a lot of equipment when I was landscaping, but thats getting on close to 20 years ago.
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Old April 28th, 2013, 03:05 PM   #15
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once you get it running good add some 2 stroke engine oil to the fuel. 1 pint per tank. i've heard from alot of diesel guys that the added lubricity helps the fuel injectors. ULSD is no where near as oily as the old diesel fuel, and can cause the injectors to bite the dust prematurely.
You are think in a vp or cp3 style system. The tractor has a rack and was designed to run ULSD. Juanita injectors are picky sons of bitches, a rebuild and pop is more than buying new ones. I would highly suggest not using 2 stroke oil instead using an additive that is designed specifically for that application and adds more lubricity than 2 stroke oil. Another issue is ash vs ash less which you didn't even mention. That a huge issue in a liquid cooled engine. The argument has always been cost of 2 stoke oil vs cost of a quality additive. In an application such as a tractor that point goes out the window.

Don't give shit advice based on your lack of knowledge on the topic. Thanks.
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Old April 28th, 2013, 03:20 PM   #16
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Quote:
Originally Posted by Haggar View Post
In general, yeah, but I need to learn a bit more now that its actually mine, not one of my dad's (He has a B and an L hydro, which usually I have one at my place). I used to operate a lot of equipment when I was landscaping, but thats getting on close to 20 years ago.
The trans is very important. Use Juanita super UDT 2 in it. Not because I am a fan boy but because it is a very light oil. Lighter than normal hyd fluid. In the cold we have saw major problems if a thicker fluid is used. The front likes the same stuff and doesn't hold much. There is a pivot bolt in the front axle with some bushing watch a replace the bushings or you will be buying very expensive cast pices. The front is a bevel gear from axel. With a loader it will use bearings from time to time nothing major. It has what the call a pivot seal where the outter drive meets the front axel. Don't power wash that area forcing dirt into that seal is what cause them to fail. If you see leaking fluid up front ill bet money that's the culprit. Use a diesel grade eng oil. It's a no brainier. Kubota brand eng oil is made by valvoline. As I have said about your current problem it's common to get water in the fuel. Keep a few fuel filters on hand. That's the basic stuff. If you have any questions pm me here and I will try to help or get you a number of someone who can. The R4 tires on that unit are awesome you will love them. Are the rears loaded?

When I started working at the dealer I didn't have the best opinion of these tractors. It was based on lack of knowledge. Now I don't even work of them and still think they are one of the best if not the best compact and mid size loader tractors.
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