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Pinion shaft bearing 933f

Pinion shaft bearing 933f

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Arkie
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I'm close to reinstalling the pinion gear assembly in my 933f.  At some point I'll need to press the left bearing on with the shaft,hub, and gear assembled and back in the machine.  The manual shows it being pressed with a specific caterpillar press that I don't have access to. I'm hoping has crossed this bridge and can offer input on doing it without that press. The shaft has the right bearing pressed on and is in the freezer now. Thanks for any insight.
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Sat, Feb 25, 2023 5:07 AM
neil
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I'm not familiar with that specific scenario but for my D2, there are various special Cat tools required for pressing that I don't have, so I had my machinist make up various adaptors etc. for a generic hollow ram that I can push and pull with up to 20 tons (they make them larger as well). That could be an option for you. For you left bearing, you could take a shot at putting in in hot oil up to 250 degrees and then quickly getting it on the shaft, but you do run the risk of it not making it all the way. Then you would need sometihng for sure
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Sat, Feb 25, 2023 7:03 AM
Arkie
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Reply to neil:
I'm not familiar with that specific scenario but for my D2, there are various special Cat tools required for pressing that I don't have, so I had my machinist make up various adaptors etc. for a generic hollow ram that I can push and pull with up to 20 tons (they make them larger as well). That could be an option for you. For you left bearing, you could take a shot at putting in in hot oil up to 250 degrees and then quickly getting it on the shaft, but you do run the risk of it not making it all the way. Then you would need sometihng for sure
Yep. I'd thought of heating the bearing too. It took hours to pull the old one off using a torch and a port-a-power. Hadn't thought of a hollow ram. The only thing I can think to push the bearing with the port-a-power is the axle nut that holds the clutch pack. I'm not sure it will handle being subjected to the pressure it'll take to press the bearing though. Neil, thank you for responding!
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Sat, Feb 25, 2023 7:17 AM
trainzkid88
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Reply to Arkie:
Yep. I'd thought of heating the bearing too. It took hours to pull the old one off using a torch and a port-a-power. Hadn't thought of a hollow ram. The only thing I can think to push the bearing with the port-a-power is the axle nut that holds the clutch pack. I'm not sure it will handle being subjected to the pressure it'll take to press the bearing though. Neil, thank you for responding!
if you go the heat in oil trick you want to shrink the shaft in the freezer first or even a bucket of iced water. this give more work time. there is also shrinking with liquid nitrogen.
the idea of shrinking the shaft too is you get a extra few thou clearance and that can make all the difference between slides into place or having to drive it.

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

instead of perfection some times we just have to accept practicality

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Sat, Feb 25, 2023 6:06 PM
Fat Dan
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Reply to trainzkid88:
if you go the heat in oil trick you want to shrink the shaft in the freezer first or even a bucket of iced water. this give more work time. there is also shrinking with liquid nitrogen.
the idea of shrinking the shaft too is you get a extra few thou clearance and that can make all the difference between slides into place or having to drive it.
I have the luck to have a tool & equipment rental store in the next town. I have rented other tools and equipment from them over the years. It would be worth a call around to see if they have one.
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Sat, Feb 25, 2023 6:41 PM
neil
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Reply to Fat Dan:
I have the luck to have a tool & equipment rental store in the next town. I have rented other tools and equipment from them over the years. It would be worth a call around to see if they have one.
If you heat the bearing, the nut will hold it. I got a thicker nut just for this purpose that engaged with more threads and I had no problem pushing my bearings on. I think with one of them I actually just tapped it on with hammer and punch after "seeing how far it went on"
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Sat, Feb 25, 2023 9:07 PM
Arkie
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Reply to neil:
If you heat the bearing, the nut will hold it. I got a thicker nut just for this purpose that engaged with more threads and I had no problem pushing my bearings on. I think with one of them I actually just tapped it on with hammer and punch after "seeing how far it went on"
I'm to point of not worrying how big the bear is , I just need to tackle it!
This bearing was a nightmare to pull and hopefully this old machine will show some kindness and let me put it back together. Thanks to everyone who have taken the time to respond!
Arkie
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Sun, Feb 26, 2023 12:14 AM
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