lazermule
Bronze Member
I just bought a 643 Bobcat (diesel) and I have a few of questions. First, where is the best place to get a service manual? Is there only one service manual out there or is there one that is better than the other?
Second, the machine is is real good shape and feels real tight still, but when I dig real had with it I have heard what sounds to be one of the chains ratcheting. Are there tensioners on these? Or would this just be due to a worn part? This is why I am looking for a service manual as I haven't even been able locate a schematic layout online for it so I can see how it's put together without tearing into it. You have to push it REAL hard to get it to ratchet...really almost abuse it, but I'd like to get it fixed before it gets worse or tears something else up.
Last, what are you guys running for oil in these? I was planning to use Shell Rotella synthetic in the engine, not sure on the hydraulic or the final drive though...
Thanks,
LM
Second, the machine is is real good shape and feels real tight still, but when I dig real had with it I have heard what sounds to be one of the chains ratcheting. Are there tensioners on these? Or would this just be due to a worn part? This is why I am looking for a service manual as I haven't even been able locate a schematic layout online for it so I can see how it's put together without tearing into it. You have to push it REAL hard to get it to ratchet...really almost abuse it, but I'd like to get it fixed before it gets worse or tears something else up.
Last, what are you guys running for oil in these? I was planning to use Shell Rotella synthetic in the engine, not sure on the hydraulic or the final drive though...
Thanks,
LM