09.b Comment Fuel Pump

This type of pump corresponds to the 190SL original equipment, but can be replaced by mechanical pumps from the free market. Frequently: retrofitted additional filters in the pressure line. When retrofitting, please check the connections of the suction and discharge lines, the reserve cock and the ram flange. The position of suction / pressure connection can be rotated by re-assembling the upper pump housing shell. Depending on the speed, intact pumps can provide an output of approx. 0.15 bar (starting speed) up to 0.3 bar and 35 ltr / h (up to 70 ltr / h at high speeds). Adjacent to dimension a2, the required clearance from 0,4 - 0,5mm results as a difference to the cam base circle in the motor, please check. The diaphragm hole circle of 70mm is a recognition mark for the compatibility (pump SLS 109090, rep. Set SLS 109010) Contemporary retrofits were also made by electric pumps, possibly with the omission of the reserve cock and in conjunction with Weber carburetors.