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

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What is the compressor motor rpm supposed to be on Model 106.153540

by Bill
(Seattle)

I have a Sears 1 hp Model 106.153540 twin cylinder compressor. What is the motor rpm supposed to be?

1750rpm or 3450rpm.?

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sears model 919.156780 rpm of motor and direction of rotation

My old sears model 919.156780 2h.p. compressor motor grounded. I need to get a new motor the nameplate from the motor is missing. Could you tell me the correct rpm and rotation???? I have the owners manual since I bought this new in 1978 but does not give this info . THANKS

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