Where do I ground my compressor at the pressure switch and motor?
I have a 1970 Sears Utility Air Compressor Model# 106.153780.
It is a 2HP, 150psi, twin cylinder, high pressure commercial capacity, 7.8cfm @ 40psi.
I bought it second hand, it is in great condition, except that the line and motor wiring was dry rotted and needed replaced.
The motor wire has 2 legs only, black and white. The line wire has 3 legs, black, white, and green. This is where I got lost. When I took the cover plate off the motor, the diagram on back shows 2 wires only but notes that motor must be grounded. The replacement wire I am using has all 3 legs. I dont know where the grounds need to be connected at the motor and at the pressure switch.
Also the motor tag says 230 volts and 10.6 amps. Should I use a 2-pole 15amp, 20amp breaker, or something else?
Thanks in advance, gary
manual and info for Sears model #106-171941
Sears model# 106.171941
Just acquired a Sears model# 106.171941 vintage air compressor that looks almost new, and runs perfectly. Looking for any manuals, parts lists, any kind of support for user info as well as planning for the future, possibly by buying parts before they are no longer available. This unit is 4 hp, 240 volt, 20 gallon horizontal tank, cast iron 2-cylinder pump. Any and all help appreciated.
Update from Steve:
An update on this unit- I was able to determine that it was made by Campbell-Hausfeld (by the 106 prefix) and emailed C-H to ask if they had any info. They sent me the attached owner's manual which you may want to post. There are also some parts available thru Sears. I couldn't find out how old it is, but I would guess maybe 30 or more years old.
This compressor seems in excellent shape, with almost no use, apparently it lived in a basement and the original owner just ran a hose up to his garage to pump up his car tires. To my mind, it's much more substantial than anything of comparable size on the market now- two of us strained to lift it into my Blazer. The frosting on the cake was the cost- $100. I think the 240 volt requirement was a drawback for possible buyers.