This compressor builds up pressure in short time.
CAUTION: Do not run the motors without consuming appreciable pressure. Uncontrolled operation may damage motors, pumps and gearing.
This is what you need. Your colours may differ.
Put some 1x1, 1x3, 1x4, 1x6 and 1x10 bricks onto a 8x16 baseplate.
Arrange the pumps like this. Note the 90 degree difference between each pump along the crankshaft.
Install this arrangement between five 1x8 beams
and put it onto the base.
Put on a 1x3 brick, some 1x6 and 1x4 flat pieces and four knobs.
Connect the pumps with hoses and put on the motors.
Watch polarity of the cable and connect airtank.
If you like you can build this compressor partly, e. g. with only one or two pumps and with only one motor.
Have a lot of fun.