33 principle

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2 years 11 months ago #380 by 57nomad
57nomad created the topic: 33 principle
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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2 years 11 months ago #426 by Dick Witcher
Dick Witcher replied the 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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2 years 11 months ago #428 by rvkapp1
rvkapp1 replied the 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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2 years 11 months ago #429 by 57nomad
57nomad replied the 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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2 years 11 months ago - 2 years 11 months ago #431 by rvkapp1
rvkapp1 replied the 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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