hi, I removed hose that connects from servo to vacuum pump today. hose was fine(has a hole patched up with insulation tape lol ) and the check valve seems to be fine. i.e I can blow air through hose only in one direction(from servo end) - but I had to blow fairly hard - not sure how much effort is needed? and I put my hand over the vacuum pump and hardly felt any suction??? how much suction is generally supposed to come out of it? it just about had enough to hold on to a thin rizla paper but not much more... help ! I've got a feeling it is probably the vacuum pump thats faulty , but just wondering if anybody has any ideas?

thanks