230 589 00 91 00 Valve Block - WS77.00-P-0035B

Model 124, 129, 170, 171.4, 190.4, 197.4, 199.4, 205.4, 217.4, 230, 231, 238.4 

Use in 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