Coop
Member
I have tried 2 of the blue Harbor Freight vacuum pumps with the R134A fitting and can not get them to work correctly. One left in the blue box and one not. Ball values in right spots and no leaks are to be found on the pot/chamber. Great Pressure but no Vacuum! When I tried to open the lid with vacuum on nothing was noted relating to any release of suction. When I place vac side fitting on face I can't feel hardly anything when it was pumping. I can't get anything to register on vacuum gauge. But the gauge may be OK just not enough vacuum to make it move the needle. Any ideas folks? My ole brain is puzzled!!COOP