To me electricity isn"t a black art, and I have no problem with it when it"s use is beneficial and used with some amount of thought put into it. In fact I just modified two tree shakers from PTO drive to hydraulic drive and used 12V actuated solenoid valves to be able to operate the various shaker functions off of a skid steers aux hydraulics.
Your right though the EPA has been behind alot of the electronic controls on the diesels but to what end? Case in point a customer with a Linkbelt crane with a computer controled engine in it. When the engine had problems nobody had the diagnostic tools to troubleshoot it. Based on what I was told by the OEM engine distrubitor even the mfg didn"t have a diagnostic computer because the engine was on a 24V system, and to even think that Linkbelt or their distrubitor would have one was a ridiculous thought. In the end the customer waited along time before getting the machine back intoi production and to my knowledge it was accomplished by just replacing parts til the problem went away because there was no way to really find the problem. Heck I"m in a similar situation jow with a 320BL CAT excavator. I chased codes and ran the diagnostic charts for all of them and it told me to replace the computer which I did. Now it"s flashing different codes, that when chased out, tell me the new comuter is the problem. The last machine I had do this I had to replace the computer, wiring harness, and the stepper motor all to solve a problem that I don"t have a clue what actually was. Why you ask, because the manual gives repair instructions of "run the chart and replace the part" as a standard practice. Ever spend days and days cutting open a harness trying to find those 5 or so wire in a loomed bundle to trace them out. Ever find the intermittent problem is caused by one of the thousand or so connections on a machine having a terminal in it that has lost it"s spring and only mates with the other half intermittently??? And just when you think you"ve seen and done it all you see something new. Saw a skidsteer the other day (one I mentioned) cutting off because moisture had made it"s way into a relay and would on occasion get between the contacts and make the curcuit just enough for the computer to sense and shut the machine down. The customer lost a day and a half of work over a $3 relay. The first half day waiting on the mechanic to show up from the rental company at which point the machine ran fine, and the second day waiting on the mechanic again when it wouldn"t start and stay running in the morning and then he had to trouble shoot and find a problem that came and went at will. As far as the EPA and their fuel saving antics and the resulting complexity of diesels I"ll go back to the cranes I mentioned before. The machine the Linkbelt replaced was a Northwest 9570 with a 6 cyl Murphy diesel in it. The Murphy is a big, slow turning engine with not alot of HP (maybe 175 for the one in the crane)but massive amounts of torque. It was designed in the 30"s and except for the in jectors being updated from the ME to the MP series was running on the 30"s technology up into the 80"s when the EPA pretty much put them out of business. The Northwest was a 3 yard dragline while the Linkbelt was a 4 yard machine. At the end of the day the NW moved nearly twice the material the Linkbelt did and on a typical day used 30 to 40 gallons of fuel vs the 130 to 140 gallons of fuel useNow taken in that respect that"s 260 to 280 galloons of fuel needed to be used by the Linkbelt to produce the same amount of material as the NW did with 30-40 gallons. Now you tell me where is the fuel savings and subsequent "environmental savings" are in that situation??? Like I said I"m not annti progress, anti electronics, or anything like that, I just hate to see technology used where it has no business being used....
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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