5 CFM Economy Series Rotary Vane Deep Vacuum Pump MSC 90066 Review

I bought this pump in an on-line auction... used for one job by the first owner. It arrived in like-new condition in the original box with all papers and packing materials. I have used it on residential HVAC service calls, replacing split condensing units 3 times, installing a new split system once, and replacing compressors 2 or 3 times. I have not used it on MVAC to date, but will do so soon because I sold the other pump I was using. Inclusion of the ACME port is a plus for those doing both HVAC and MVAC.

I have changed the oil two times in two years intermittent usage.Keep in mind I'm in Arizona and do not have much moisture in systems I evacuate. I plan to change the oil again this week after two recent pump-downs on residential AC units. I also plan to adjust/tighten the packing nut to see if this improves sealing of the shut-off valve. Recent use indicated a loss of 600+ microns when turning the valve to closed. See my other review of the Yellow Jacket 69075 vacuum gauge.

Overall I am very pleased with this unit.

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Product Description:
5 CFM Economy Series Rotary Vane Deep Vacuum Pump' High Efficiency Two Stage 5 CFM Pump ' Ultimate Vacuum 25 Microns ' Manifold Valve Isolates Pump From The System When Testing For Leaks ' 3 Inlet Ports: 1/4', 3/8' SAE And 1/2' ACME ' Gas Ballast Helps Prevent Oil Contamination ' Internal Check Valve On Pump Access Fitting Prevents Oil Blowout ' Easy Access Oil Fill Port ' 1/3 HP 110 Volt Motor ' Weight ' 38lbs ' Oil Capacity ' 8oz

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