290gdt two vacuum valves on firewall function and routing

[Waldi Nysschen]

Hi all.

Could anyone tell me what the purpose is of the two vacuum valves on the firewall? Can anyone supply me with the correct pipe connection diagram for the vacuum pipes on these valves, as ours are disconnected.

Thanks.
Waldi

[Pete460332]

Picture will help

[Dikfrik]

Waldi

Praat jy van die elektries beheerde valves wat so langs die battery box is?

Ek het probeer om uit te vind - naaste wat ek kon kry bymy local MB dealer se WIS is n beskrywing van "economizer". Ek het op al Harald van P3 se CD's gekyk en kon niks kry nie - ek dink n ou moet iemand wat die WIS ken kry en dan n uur of wat van sy tyd boek en deur die ding werk.

Huidig is myne ge-bypass - vacuum gaan na die vacuum control valve by die throttle control (langs die break vacuum booster) en dan terug na die ratkas- sal kyk en n paar pics post

Groete

Freek

[Pete460332]

could it not be part the diff locker system like the 463's?
Peter

[Waldi Nysschen]

Hi freek

ja dit is die elektriese valves wat jy van praat. Ek het self ook op wis gesoek en kon niks kry nie. My pype gaan ook direk na die throttle dump valve toe. Werk jou ratkas se 2b (off-road first gear locked) funksie. Hierdie valves beheer nie dalk hierdie funksie nie?

Dankie.
Waldi

[Dikfrik]

Peter

My best guess was that it was supposed to control the diff locks on the 463 - however i do remember that one valve was called an "economizer" on the EPC.

Waldi, my gearbox lock in all the gears- i can manually select a lower gear from 3 to 1 (B) and it will not automatically switch up to the next higher gear . As far as i understand these gearboxes have little electrical or pneumatic control other than the vacuum to the vacuum modulator on the or electrical switches for the kickback (i believe the same switch or control is used for locking the box in a gear but i could be mistaken). Attached some info about the vacuum to the gearbox

Regards