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Somebody seemed to believe the way to maintain this unit was to dump a pint of oil into it.
Even with that, one of the main problems with it was still gummy lubricants and seized mechanics.
Serial Number:  | M 158452 |
Year of Manufacture:  | 1950s ? |
Date of Receipt:  | 2001 May |
Source:  | CVRS contact. |
State upon Receipt:  | Filled with oil. |
Status:  | Addition functional. |
Date:  | ~2001 |
Procedure:  | Base pan and other surfaces cleaned of gross amounts of oil. |
Date:  | 2013 Feb |
Procedure:  | Exterior cleaned. Some cleaning of mechanism. Keycaps 6 and ShiftRight broken on inside. Plastic glued with crazy glue, voids filled with hot glue for additional strength |
Date:  | 2013 Feb |
Symptoms:  | A couple of numerics keys are jammed. |
Solution:  | Key bars had slipped out of their guide by the storage face. Some straightening of the key bars for alignment of the keycaps. |
Date:  | 2013 Feb |
Symptoms:  | Numeric keys are locked. |
Solution:  | Keypad lock on short shaft below total and sub-total keys is stiff from old lubricant. Unseized with lubricated contact cleaner. |
Date:  | 2013 Feb |
Symptoms:  | Some digits sticking. Total will show non-zero after prior total (clear). |
Solution:  | LCC sprayed on register gears. Addition works. Subtraction seems to work except when only a single digit is entered the digit always registers as 1. Multiplication still loops endlessly. |
.. | Olivetti Multisumma 22 | ..
Mechanical Calculators |
bhilpert |