230 589 00 91 00 Valve block - WS77.00-P-0035B
MODEL 124, 129, 170, 171.4, 197.4, 199.4, 205.4, 217.4, 230, 231
FG 77/Set B
Adapt valve block between hydraulic pump and hydraulic cylinder lines to determine inner leakage of the cylinder.
Courtesy of MERCEDES-BENZ USA