While overhauling the Schaublin 13, some o-rings are to be replaced. The original plans show a cryptic reference for the parts. We found how they relate to o-ring sizes.
The Schaublin manual shows o-ring referencies of type PRP-ddd where ddd stands for a 3 digits number. We realized that this corresponds to the 3 digits o-ring numbered series of standard SAE AS568. This allows us to check again the replaced o-rings for its right dimensions.
In the following table, you will find a summary of o-rings we replaced during the Schaublin 13 (1974 model) overhauling.
|Part||Manual reference||Metric size (mm)|
|Feeds gearbox||PRP-010||6.07 x 1.78|
|PRP-016||15.6 x 1.78|
|Lubrication pump||PRP-110||9.19 x 2.62|
|PRP-023||26.7 x 1.78|
|PRP-026||31.47 x 1.78|
|Variator pulley||PRP-219||32.92 x 3.53|
|PRP-121||26.64 x 2.62|
|Speed change lever||PRP-210||18.64 x 3.53|