Recent content by Chessie

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    What holds the lapbar up on a 743?

    Yes, the outside bolt comes off first. (Shown clearly in the second picture that you posted.) Then the interior arrangement can come out of the "U" channel. The inside nut (3/4" wrench) has a threaded hole that accepts the first (outside) nut. You hold the 3/4" wrench on the "barrel" (around...
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    What holds the lapbar up on a 743?

    I've had the replacement springs for several weeks now, and I finally made some time to replace them. Now, I'm not going to tell you that I didn't bust a knuckle (darn those nuts were tight!) and I'm not going to tell you that I didn't put it back together wrong a time or two... (there is a...
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    20240319_095723.jpg

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    What holds the lapbar up on a 743?

    (BTW, thank you much for the link!)
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    What holds the lapbar up on a 743?

    Yeah, silly me, when I got the machine, I greased that area... I really should clean it off with a solvent or Diesel.. I wiped it off some when I first made that mistake... perhaps I should make it more "rough" than smooth.... I don't usually think about it until it has slipped down and I go...
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    What holds the lapbar up on a 743?

    Hey Malcom, if you find a good source for those springs, please post... I'm in the same boat! Thanks!
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    743 crankcase pressure problem

    Crankcase pressure can only come from the combustion pressure not being contained in the combustion chamber. So either the rings are loose and leaking (blow by) or the valves are not seated well and some of the pressure goes around the valve seat and into the head and back down into the...
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    1835b fine timing

    First of all, if you have the manual, and can use it, do. If not, go with the "old fashioned mechanic" way. Turn it a little, and try it. If it's better, turn it a little more and try it again.. repeat until you are happy. By turning the Injection pump timing (a little) you are not breaking...
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    1986 Bobcat 743 - Hydraulic stalls when using an auger

    The head unit does not seem to have its own relief valve. When the auger stalls, it's behind the seat that I hear the hydraulics making a different (bypass?) noise. The down pressure on the auger is definitely the key (as well as how much dirt is piled up on the auger) to how much it is...
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    1986 Bobcat 743 - Hydraulic stalls when using an auger

    Wayne440... I appreciate the reply/thoughts/questions... Here are some answers: 1) I've used a Bobcat "tool cat" with a big (transplant) auger on it. That was probably a more powerful machine with higher-flow hydraulics, just because of how it operated. I'm sure that the Bobcat Toolcat was...
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    1986 Bobcat 743 - Hydraulic stalls when using an auger

    I have a 1986 Bobcat 743 that I bought with a root grapple. It works great, even if the grapple arms move slowly. I bought a new auger. I tried to drill a large hole (18 or 20" in diameter) to a depth of about 4 feet. When I'm pushing down on the boom, I'm able to stall the auger and stop...
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