[Captain J]

Question to you all?
When removing the vacuum modulator, is it normal to see oil coming from the slot?
Or
When removing the valve body behind the modulator, is it normal to see oil coming from the slot?

Because
The first time I removed the modulator, nothing came out.
When I removed the valve, few drops came out, like 20-30 drops.��

Last night (my time +3 GMT, I managed to get new vacuum modulator, to replace the old one. The moment I pulled it out, oil came rushing down, socked me. I put the vacuum back. Then I swapped the old with the new, minimizing the quantity of oil loss.
Oil quantity lost was about a 1.5 ltr.������*����

The question:��������
Why no oil was lost when I removed the vacuum modulator and the valve body the first, while I lost a lot of oil when I removed the vacuum modulator ONLY the second time?
Where is all this oil coming from?

I didn’t test drive the truck yet, until I know what happened?��