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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 2657" data-attributes="member: 307"><p>Most of the Bobcat machines in the 98 and older vintage (pre G series) are only computer controled if they have the "Boss" guage package or "system" The idea behind the boss was to shut down the machine or warn the operator, depending upon the seriousness of the malfuction the guage sensors were reading. Low fuel level, hi air filter restriction, above normal coolant temp, low coolant level, low batt voltage, would sound an alarm. ------------------------------------------------------------------------------------------------------------Low engine oil press, hot coolant temp, hot hydrostatic temp, low charge oil press would cause an engine shutdown in a few seconds. Machines without the Boss had the std 2" round guages instead of the bar graph guages and had nothing fancier in the wiring then a common automotive relay for the glow plugs and engine fuel shutoff, And a hand full of magnetic sensors for the BICS (bobcat interlock control system (I think)) for machines 94 and Newer. The bics controller is on the operators right beside the seat on these machine and has 5 lights on it. ------------------------------------------------------------------------------------------------------------ The Boss system could be switched to the std guage package for the cost of a few guages and a day or two of wiring. The bics system should it fail could also be bypassed for minimal cost and the machine would still have the mechanical safety lock for the boom and tilt. -------------------------------------------------------------------------------------------------------------Interestingly, the seat cushion switch that was used in the early bics 94 to 98, had a bypass kit available from bobcat as stuff (gravel, pop can etc) would get under the seat and the loader would lock up, and so bobcat quit using a seat sensor on the G series 99 and up loader.--------------------------------------------------------------------------------------------------------------------------------- Imho these machines are not really computer controled and in the event that a Boss computer box, or the fancy guage panel failed the machine could be switch to a std guage package. --------------------------------------------------------------------------------------------------------------My 93 753 did have the Boss and I replaced 4 or 5 sensors on the machine at 30 to $50 between 2000 and 3300 hrs. I also had the system start throwing up giberish codes @ 3100 hrs, this was traced to a bad computer, dealer gave me a used loaner to verify. Ran good for 100 hrs, Then I reused my old one that we had drilled the rivots out of its tin box, and tighten up a few "ground" screws on the printed circuit board. And it was cured.---------------------------------------------------------------------------------------------------------------- 93 was also the last year without BICS I'm not really a fan of the early boss system, but I would'nt be scared of it either. The G series I'm told is more reliable, but at 1800 hrs its too soon to tell. Just in case any you get around to purchasing a (becoming) old C or F series machine someday. regards Ken</p></blockquote><p></p>

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