Hydraulic Oil Pump
- Check oil level in reservoir, fill if necessary. Disconnect pressure hose from pressure line (to level control valve) at rear connection. Connect special 3-way valve (Mercedes-Benz tool 038o) with pressure gauge (Mercedes-Benz tool 038a) to pressure hose. Place a graduated container under 3-way valve.
- Run engine at 1000 RPM and check pressure gauge reading. Reading should be 2900 psi (204 kg/cm2 ). After engine has run for 1 minute at 1000 RPM, check cup for fluid volume which should be 0.74 qts. (0.70 liters). Reconnect pressure hose to pressure line, check reservoir fluid level.