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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

bobcat 763

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06-17-2005 15:59:15

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I"m looking for some advice on servicing a 763 bobcat. I"ve worked on lots of Case and Deere skidsteers, and a few New Hollands, but I haven"t done much with a Bobcat. What sort of oil does this machine use in the hydraulics? It looks like hydraulic oil, but I know lots of skid steers take 10W30 motor oil. Also, what about the chain case? It also looks like hydraulic oil, but I know some skidsteers use motor oil in the chain cases instead. Is there any trick to draining the chain case? I"ve removed a little plate under the rear of the machine, and there are two plugs. One looks like it would drain the fuel tank, and I assume the other is for the chain case. The one that looks like it would drain the chain case is a wierd rubber plug, not a pipe plug. Does this just pop out, or is there some trick to this? Do I need to put any sort of sealant on it when I put it back in?

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06-17-2005 18:16:48

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 Re: bobcat 763 in reply to JimKS, 06-17-2005 15:59:15  
Bobcat uses the best grade of hydraulic oil available, I've not had any trouble with the tractor/hydraulic I buy at my local place, but it is a few dollars more per bucket than the cheap stuff. Chain case also takes hydraulic oil and your on the right track to drain the chain case, it's just a plug that when pushed inside a rubber grommet makes the grommet expand enough to seal the hole, I usually pop them out with a pair of wire cutters or anything that it thin enough to get behind the small head of the plug and allow some leverage to get it to come out. Alot of times if the rubber piece comes out as well it will probably be deformed enough that you will have a heck of a time getting it back in there, no sealant is needed.

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06-23-2005 03:51:26

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 Re: bobcat 763 in reply to gatractorman, 06-17-2005 18:16:48  
Quote:"Bobcat uses the best grade of hydraulic oil available"
If you mean engine oil, then your right. We run 15w/40 RX Super from Castrol in everything in our 763, apart from the fan drive which takes 80/90w. Don't use dextron III or that type of hydraulic oil.

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06-18-2005 19:09:19

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 Re: bobcat 763 in reply to gatractorman, 06-17-2005 18:16:48  
Thanks for the advice. I'll be putting Deere hydraulic oil in it... I imagine it's as good as any. I assume that I fill the chain case up to the level of that pipe plug on the front?

Seems like a pretty well made machine- it's just configured a lot different from all the other skidsteers I've worked on.

One of the axle seals is leaking oil- how big a deeal is it to remove a front axle? Is the outboard bearing lubricated with chain case oil or with grease? Just wondering where exactly they put the oil seal.

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06-21-2005 17:40:28

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 Re: bobcat 763 in reply to JimKS, 06-18-2005 19:09:19  
I'm sure Deere oil will be fine, yes fill it to the level of the plug on the front. Bobcat machines are solid as anything else, watch out for wiring and electrical problems on the 2000 and up models. I dont think you have to pull the axle to replace wheel seals on your 763, the best I can remember the hub that the tire bolts to will unbolt as well and come off the axle and your seal is right there, should have a large 1-1/2" head bolt that holds the hub to the axle, the hub and axle are tapered and it also has a large keyway on the taper, so the hubs are usually a bear to get off.

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