Vacuum pump

[BeeKool]

I converted the brakes on my Bee to power. I want to have them working good and know my lines are good before I drop put the motor in so I bought this pump. Should work. Anyway I need to know how to hook it up electrically. Here are some pics.

 

[Yatzee]

What you have is a pump with a vacuum switch to shut it off once the level of vacuum has been reached. That vacuum switch may also be used to turn the pump on when there is no vacuum present. You'll have to determine if the switch is NO or NC ( normally open / normally closed ). If it's NC the switch ensures that the pump will not run constantly as vacuum opens this switch. You really need to add a vacuum reservoir for a reserve to lighten the duty service or you will get either low or pulsing vacuum when it's in demand. You should also add a relay to switch the load of the motor off the ignition power system to a better source like the alternator or battery. The large red wire is the power source of 12vots+ and runs directly to the motor. The other wire coming out of the motor (black) makes ground via the isolation mount. It appears as if someone added a cutout solenoid which was either connected to a remote switch, ignition or in series to the coil circuit of a relay. When vacuum is reached, the cutout solenoid opens, canceling power to a relay coil, the relay contacts open and the pump shuts off. I wouldn't trust the relay mounted on the pump to switch power to the motor - unless you know it's amp capability. You should test the vacuum capability of the pump with a vacuum gauge before installing and a check valve should be present in the suction line of the pump to prevent bleed off in the event of pump failure - another reason to have a reserve vacuum reservoir.



















this

 

[BeeKool]

So cap the purple and connect the red to +
Black to -
I'm just using it to provide vaccumn to my car while it's on hoist without motor