Is brake fluid clogging up your plunger and making it difficult to squeeze?
Is your MaxPro leaking from the cylinder?
Is your MaxPro not sucking or allowing fluid back into the cylinder?
Is air still getting into your cylinder after you have primed the tool?
Are you getting air bubbles in the cylinder?
MaxPro and V12 Cleaning
MaxProHD Cleaning Video
MaxProHD Rebuild Video