Can i remove the turbo boost diaphragm on a diesel injector pump safely, it controls rich fuel mix for turbo?

Its a 1999 TF series holden rodeo turbo diesel an the crankcase vent had let to much oil into the air-intake, this was pushed up by the turbo into the manifold where the small pipe is taken off to control the fuel richness in the injector pump, this little pipe was blocked and i don't know the condition withing the diaphragm control, is it safe to remove the top off it or is it under pressure.