33 principle

3 years 7 months ago #380 by 57nomad


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  • 33 principle was created by 57nomad
    I had the opportunity to work on a 33 principle machine today. This has to be the worst design NCR ever made. I can understand why it was short lived. It jams every now and then ,maybe just showing its age. The pawls that slide side to side to drive the wheel in the counting drive line ,just don't go into position sometimes and it's jams up. It's well lubricated any ideas?

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    3 years 7 months ago #426 by Dick Witcher


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  • Replied by Dick Witcher on topic 33 principle
    You have to get the oil (Liquid Wrench) between the cast iron snake cams. I use a shape knife to tap between the cams. If you can get them to move sideways on the shaft the oil will eventually get down to the shaft. Work on all of them. If any cams are broken out, it is a job to replace them. I do have a repair DVD on the 30 & 33 for $45
    Dick
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    3 years 7 months ago #428 by rvkapp1


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  • Replied by rvkapp1 on topic 33 principle
    The cams are easy to replace, but difficult to find. There is a set screw and the shaft slides out letting all the cams to be removed. This is a common problem with the 33 style mechs. If a key is forced down it usually breaks out the side of the zig zag cam.

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    3 years 7 months ago #429 by 57nomad


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  • Replied by 57nomad on topic 33 principle
    Thanks guys, the cams are intact so I will try Dicks advice and soak in the tank and re oil it again. If it works I gonna print a retraction on all that horrible stuff I said about the 33 principle registers

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    3 years 7 months ago - 3 years 7 months ago #431 by rvkapp1


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  • Replied by rvkapp1 on topic 33 principle
    I have found that they need WELL lubercated and you need to make sure that the clock springs are wound and that the winding mechanism is working.
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