Wardner, Air compressors can ary dramatically in terms of vacuum available. aIt all has to do with the type of valving, state of the piston rings/diaphram, and compression ratio. Some pumps will not make more than 120psi even dead headed, while others will make twice that. Designs are not comparable. Refrigeration compressors are much better at vacuum. If a used compressor is available, they will pull at least 20"HG. Garst corporation makes inexpensive vaccuum pumps as well. In all cases it is necessary to keep the transfer oil out of the pump to avoid sevier dammage. Why not use a small positive displacement pump at the lower end of the system. Little Giant makes pumps with oil compatibility for $50.00 and up. A power steering pump from almost any vehicle will also do it. Just random ideas on the topic. JimN
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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