Average Reviews:
(More customer reviews)I haven't had this product for long so I can't report on it's long-term durability, but I am very pleased with the quality and useability, especially considering the price.
This package says only OEM, but the pump is branded Mityvac and I believe that it's sold under that name as well. The product appears to be designed and sold by Lincoln Industrial of St. Louis, MO. It is manufactured in China. See www.mityvac.com This set looks a lot like the model MV7000 with one fewer right-angle bleeder adapters. Note however that the MV7000 is rated to produce 25 PSI pressure. The OEM 25136 I received from Amazon can only develop 12 PSI (measured on two separate guages)
The set comes with a nice selection of adapters for attaching the pump lines to various vacuum ports and even some plugs for plugging hoses you've temporarily removed for testing.
Another accessory that's worth mentioning is a collection vessel that allows the pump to be used for bleeding brake systems or other small hydraulic control systems. It also has two different right-angle adapters for attaching to common automotive bleed fittings.
What I didn't expect is that the pump has a second port that can apply pressure. This could be useful for testing controls the require a pressure signal rather than a vacuum signal and can supply up to 12 PSI. By the way, the vacuum port can produce a 25"Hg vacuum as advertised.
The pump is very easy to operate to draw a vacuum or apply pressure, requiring only modest hand strength. It has a trigger that can be pulled to release the pressure/vacuum when you're done testing. The release is "all at once" and would be difficult to modulate if that was important. Drawing the vacuum can be done with reasonable precision. Applying pressure is less precise since it's developed by the strength of the pump handle's return spring. But can be modulated if necessary by taking small strokes with the pump.
Another unexpected plus is the user manual. It contains 23 well written pages that describe how to use the tool as well as diagnostic proceedures and some theory of operation for PCV valves, EGR valves, Spark Delay valves, electrical/vacuum solenoids, thermal controlled vacuum switching valves (called PVS, TIC, and DTVS by Ford, Chrysler, and GM respectively). The manual also has a section on brake bleeding as well as cautions when working with ABS systems. It even has a separate section dealing with motorcycle brakes and bench bleeding master cylinders. For some reason there are an additional three test procedures specifically for Lawn Boy mower primer bulbs, fuel inlet valve, and tank shut-off valve. The content is repeated in Spanish, French, and German for a total of 70 pages.
Even though I have a pretty good general understanding of the systems discussed in the manual, I actually learned quite a few tips and tricks that I didn't know. It was well worth the read.
One thing to note is that the documentation specifically prohibits the use of this pump with flammable liquids and gases. I suspect that this is more for safety and legal reasons than anything else. But, who knows, maybe the pump seals wouldn't handle the solvent power of gasoline or alcohols. Air and brake fluid are officially supported and that's what I bought it for anyway.
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OEM 25136 Vacuum PumpThe Multi-Purpose Vacuum Pump is for many automotive applications such as tune-ups, diagnosis and testing, one man brake bleeding, and liquid siphoning. Pumps approximately 1 cubic inch per stroke. The pump includes the precision-made repairable vacuum/pressure pump, a transfer and storage lid, two - 2 ft. lengths of 1/4-inch I.D. Tubing, develops and hold up to 25-inch(62cm) of Mercury (Hg) vacuum, Rubber Cup Adapter, Vacuum gauge scaled in inches and centimeters of Mercury (Hg), Automotive Adapter Package Reservoir jar, Mini User's Manual (English and Spanish),A multi-purpose vacuum pump for many automotive applications such astune-ups, diagnosis and testing, one man brake bleeding, and liquid syphoningIncludes:Precision-made repairable vacuum/pressure pump
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