Need to remove wheel hub to replace brake cylinder. Mechanical puller is used to pull and replace whefl hub, according to the manual. Although, the wheel hub on the 70D has no wheel weight, its on the same spindle shaft as a 12E though,...which requires a hydraulic puller to pull and reinstall the hub on the spindle shaft. I highly doubt the mechanic puller is capable of either operation and there is no referencing for torque to pressure. The hydraulic reinstallation calls for 20-25 tons of pressure. Anyone ever use us the mechanical push/puller for this job?  If so...what is the torque for rejnstallion...providing its cspabld of removal? PS. I have the cat mechanical push/puller available to me. I just don't believe the mechanicsl puller will work. 

Mark - this past summer I repaired the brakes and replaced the tires on my 212. Getting the rim off of the hub and the hub off of the axle shaft was very difficult after being exposed to the elements for 70 years. I tried using a mechanical puller at first but couldn't generate enough force to remove the first hub. I removed the screw on my puller and inserted a 50 ton hydraulic ram. On the first hub the ram and porta-power pump I was using was maxed out, it then took a hit from a sledge hammer to get it to release. The other hubs came off with the 50 ton ram alone. I'm guessing I had about 40 ton of pressure on the hubs when they released. I am going to build a press/puller to press the hubs back onto the tapered shaft. Good luck.

I'm going to give it a shot with the Cat mechanical push/puller. If it doesn't work, and I suspect it wont, I'll adapt a hydraulic jack or porta pack to it. Then I'll engineer a hydraulic pusher configuration to push it on. But thanks for the reply.

I'll get it off. I'm sure of that. I'll recondition everything possible and replace everything necessary. It'll go back on correctly, too. I'll gage the pressure, 20-25 tons. I'm not willing to guess on anything if I dont have to.. Too much of a hassle to screw around. Prefer to fo it right and just once. Very little grader info and knowledge/experience on ACMOC. I think it should be renamed Antique Caterpillar Bulldozer Club or ACBC. D2's specifically. Maybe ACD2BC.

Looked around on discussion board search-maybe this 8T info will be helpful:

Thanks for trying to help, but that screen shot is incomplete. I'll look up the thread though. Thanks.

Hi Mark, I'm sorry you are disappointed in the responses you received. Perhaps it had something to do with your title of this post, starting with 70D instead of No. 12. Your post has only been a up little less than 2 days as of this writing. We have grader owner members who should be able to help, maybe they didn't see this post yet.
It sounds like you already had a proper plan of action in mind before your post. I started to answer your post with my limited experience with a No 12 8T. but I knew there were too many variables that could affect the outcome.
I was glad that members tried to help you even though you were not happy with them or our club,
Craig
 

I looked at yhe thread on this. Good pictures. I've had both my 12E and 120 14K's hubs off for break jobs, but used the Cat hydraulic push/puller for them. I no longer have access to them but I do have the Cat mechanical push/puller for the earlier 70D and 8T models (and earlier models) The same spindle is used on all of them. The ones in the photos were installed incorrectly in my opinion, with incorrect pressure..20-25 tons and or wrong key. The hub key slot is wasted, indicating this. That's why it came off so easily, it wasn't torqued properly...I believe. My question is/was....is the mechanical Cat push/puller capable of the force required for removal? I'm doubting it. And for reinstallation....what torque on it equals 20-25 tons. (The manual never says) Not sure if it can be achieved with the Cat mechanical push/puller. The hydraulic one (if I get Cat to do a service call) has a different width jig. So, I'm m not sure it will or can be adjusted to fit. I can mathematically figure the torque for the mechanical push/puller but not sure it's even going to be achievable. Probably just going to have to adapt a hydraulic jack or porta pack to the Cat mechical push/puller. So...just wanted to know if anyone out there has run into this issue. Like to just use what I have. Got enough to do as it is. Thanks for the help though.

Oh, I dont mind the responce at all. Not necessarily here for that. Technical library is what it is and the fact that most people on ACMOC are clearly crawler tractor oriented is fine. I've just discovered the facts of ACMOC. Not much knowledge/experience on graders here. As far as my plan goes...just looking for info to help my "plan" before I start. Thanks for replying, Craig.