http://www.thisoldtractor.com/gtbender/
Updated: Prior to 2007 Dec 11
| Model | Year | Front Brake M/Cyl Clutch M/Cyl | Rear Brake M/Cyl Proportioning Valve | Front Brake Caliper / Right | Front Brake Caliper / Left | Rear Brake Caliper |
|---|---|---|---|---|---|---|
| 500 Quattro | 1974 | 10.2863.04 | - | - | 20.2247.11 | - |
| 504 Sport | 1975 | 10.2863.04 | 10.3448.10 - 17.3338.11 | 20.2676.40 | 20.2676.41 | 20.2247.11 |
| 750 Sei | 1975 | 10.22728.04 | - | 20.2247.10 | 20.2247.11 | - |
| 750 Sei | 1976 to 1977 | 10.2728.04 | - | 20.2247.10 | 20.2247.11 | - |
| 900 Sei | 1978 on | 10.2863.04 | 10.3448.10 - 17.3338.10 | 20.3556.41 | 20.3456.40 | 20.3456.31 |