Hi, I have a 743 with a broken chain on the right rear wheel. I pulled the cover, drained the fluid and found the broken chain in the bottom of the case. I jacked the unit up, removed the tires and wheels, and checked end play on all four axles. The axle with the damaged chain has about 1/16" play. I did not measure exactly as it was obvious it was way out of spec. I removed the axle and the outer bearing stayed inside the axle tube as the seal did not come out. I used a porta power to push the axle out. Once out I could see that the race on the outer bearing was scored from debris. I removed the gear from the case and it looks worn but might be serviceable. I already ordered a new chain, seals, and gaskets from Bobcat and they will be here Wednesday. There is so much debris in the bottom of the chain case that I decided to pull all axles to clean and reseal the whole lower unit. Once the damaged axle was removed there was a accumulation of material laying on the bottom of the tube for the full length. If it is in this tube it will be in all the others. The chain case oil was milky from water contamination. There isn't any rust on chain or gears so I am not sure where the water came from. The seals are not leaking so I would think that if it wouldn't allow oil to escape then it wouldn't allow water to enter. I did use a pressure washer to clean this thing before I started working on it but that wouldn't have caused the milky condition. This is the first Bobcat I have ever worked on. I bought this from a relative (I know) and it was represented in better condition than it is. Here are some questions I have in doing these repairs. I am concerned about the outer bearing coming off the axle when the axle was pulled. It is supposed to be pressed onto the axle and it seemed to come off too easy. There isn't any indication on the bearing seat surface that indicates it has been spinning on the axle. Should I be concerned if it doesn't press on tightly? The gear had some nicks but didn't show a lot of wear. Replacement gears would be around $480.00 each according to Bobcat and I am not wanting to dump that kind of money into the machine. What's the opinion on a decent set of used gears? I most likely will replace all bearings on all axles. It seems that I can buy the bearings without races since the Bobcat takes a different race than what is normally supplied with bearing sets. I have been reading the service manual and it calls from some bolts to be tightened to 500 ft lbs. Is that correct or possibly a typo? I also noticed that the broken chain had slid over to the left side and had been interfering with the left rear wheel chain. The chain has mashed spots on the chain ends but it doesn't look damaged to the point of replacing. Should I replace it anyway? Space is at a premium on working on this machine. I was looking at the 20 bolts that attach the chain case to the upper half of the skid steer. Would removing those 20 bolts and removing the hydraulic lines free the whole lower unit from the upper or are there other things attached that would make it not worth the effort? I know that splitting a bearing race can be used to drive a new seal into the axle tube and I already split one for that purpose. I saw the tool that is designed to install the inner races but I am thinking that I might be able to use a porta power to install them. I will have to make a bracket to push against but I think I can do that. This has what I think is Teflon chain guides. Chain deflection on all chains is around 1" or so. The manual says to remove a link if necessary to tighten in. There is not a full link length of slack so removing a link is not possible. I just don't know how much slack is acceptable. Any advice here would be appreciated. My main concern is the axle bearing coming off instead of pushing out the seal. Would that be a problem in the future. The other concern is whether it would be worth the effort to remove the whole chain from the upper section of the loader. Since this is the first time I have tackled something like this any advice will be taken seriously. I want to do this only once. Wow, this was a lot of babbling here