Quote:
Originally Posted by grisle
Hello this is my first message in her 
i have a 220d with a ( as I understand it) vacum droven deaceleration system on the ip( a spring setts it to ful trottle and the vacum deac. it. Dose somone know wate I have to do before i start with the timing? I`m thinking on the part about : setting it on ful trottel, disconecting vacum lines ( the stop is wire driven) any tips or trick`s?
Reg: Grisle |
The 220D has a pneumatic governor. Vacuum created by a venturi in the intake manifold works against spring pressure to control the amount of diesel injected and so the speed of the engine. A throttle (controlled by the accelerator pedal) controls the air flow through the venturi and so the vacuum.
The starter knob on the dashboard has to be in the "drive" position. That is enough. The spring will force the pump into the full-load position, because when the engine isn't running, there isn't vacuum.
The 220D has a M pump, meaning that there is a copper washer and a rubber O ring, nr. 5 and 2 in the picture below:
The copper washer always needs to be replaced by a new one, the rubber O ring usually too, but if it is not damaged, it can be reused. The copper washer is a specific one, get one from the MB dealer or a (Bosch) diesel service station. You have to torque the delivery valve holder in this order: 30 Nm > loosen, 30 Nm > loosen, 35 Nm. This ensures that the copper washer is properly seated. Oil the threads of the delivery valve holder beforehand.
Clean the IP beforehand too, so no dirt will get into the pump.