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Properly designed electronic circuits should surpass many diesel engine rebuilds. This statement does not apply to consumer audio/TV/video products. The complexity of those products greatly outweighs their quality. If heat, vibration and moisture are a problem, then printed circuit boards can be contained in potted modules. Most of the electronic failures I have encountered throughout time were power supply components, relays, switches, potentiometers and connectors. Of course, if surges or continual abuse occurs, then any component can fail. Controlling circuitry seems to hold up well. Sensor characteristics can change over time and send out-of-range values to the controller which can result in errors. The government closely mandates that ODBII automobile computers provide a basic set of signals to limp home in the event of a drivability problem. The check engine light has three modes of illumination to indicate the severity of the problem. I'm not sure if the government mandates the same for agricultural tractors or heavy equipment. One thing the government does require is for a manufacture to keep replacement parts available for ten years after the product model is discontinued. In the event of a failure, I'd probably want to know how Deere and Kubota communicate it to the user and mechanic. Is the serial data specific enough to make an accurate diagnosis? Another question would be, "How many custom IC's are in the Deere and Kubota circuitry?" Also, "What methodology did Kubota and Deere use to perform their reliability studies?" Are schematics available to the owner and has anyone seen them? My new tractor does not have the latest complex circuitry, but here are some things I did to help prolong electrical longevity:

1) Sealed some connector ends with silicon rubber (RTV).
2) Put a section of bicycle inner tube over connectors in potentially wet areas and wire tied the ends tight.
3) Applied Caig Preserv-It on every electrical connector and engine sensor pin/socket.
4) Wrapped some connectors with electrical tap to help keep dirt out.
5) Sprayed dash switches with Caig Progold.

I did not take the center console cowl off yet, but plan on doing it this spring. It took about four hours to do the above and I figure under the consol will take another two hours. Most of what I said was food for thought and maybe someone out there knows the answers to some of the proposed questions.

4xxx electronics long-term viability
John Deere Tractors
Replies 36 Post by R_squared

There are many differences in construction and materials from one oil filter to the next. You might want to cut off the cap of a spent, original Kioti filter and do the same with your new cheaper replacement. You should be able to make enough visual inspections to see if the $8.50 Kioti filter is worth it. I plan on doing this when the first oil change is due. The factory filter is not a WIX, but most NAPA stores have a WIX cut-away on their counter for sales reference. A Kioti factory tech rep indicated to me that they have not had any problems with their oil filter brand, but they have with other brands. Of course, Kioti has a vested interest in selling original parts. I wonder why the Kioti factory filter weighs so much. Be careful!

kioti 1910 oil filters
Kioti Tractors
Replies 9 Post by R_squared

Captain B and bullworker referred to the purchase of books or a poster. Your public library is an economical alternative. Unless you take a class or have an experienced mentor to explain the many welding parameters, several books with colored pictures are invaluable. They will show you flame length, neutral flames, and the effects of gas pressure, travel speed, and slag formations for both cutting and welding. Try to duplicate the pictured conditions on scrap metal - you can write the tip size, acetylene and oxygen gauge settings on a piece of masking tape and stick it on the scrap piece for future reference. I have found that there is a fair amount of overlap, in what can be cut, between the various tip sizes. Cutting 1/8 to 1/2 inch plate is pretty easy, but sheet metal is tricky. Even with a 000 tip the kerf can be wide and the sheet metal can warp. The equipment settings are the first to get familiar with; the second is holding and advancing the torch. Practice on some spare good steel before you make the final cuts for your project. Homemade elevated straight edges to cut plate, angle and square tube will help you to maintain a straight edge. They can be held to the stock with c-clamps and they allow you to better concentrate on tip position and travel speed. Good Luck.

ROB

Pressure for Oxy Acl torches
Parts and Repair
Replies 28 Post by R_squared