Modulating Pressure
- Disconnect vacuum hose and remove rubber cap from vacuum control unit. Pull locking plate out of locking slots to permit rotation. SeeFig 1
.
- Adjustment screw in vacuum control unit can now be adjusted by means of locking plate. One turn of adjusting screw results in pressure change of 6 psi. (.4 Kg./cm2
)
- After turning adjusting screw, push locking plate back into locking slots. Put rubber cap back on vacuum control unit. Connect vacuum hose and check modulating pressure again. Install screw on vacuum line holder (if equipped).
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.