Brake upgrade, vacuum pump wiring

[Alspos]

Pump is the same as far as i know. UP-28

 

[Deuce]

Very neat way to assist vacuum on a big cam motor. We'll done.

 

[Skylarking]

Good setup.

An alternative is you could adapt the mechanical vacuum pump which Toyota attaches to the rear of the alternator on mid 80’s lanscruisers.

 

[Alspos]

I'm not sure whether making additional brackets and figuring out how to drive it would be worth the time...plus the additional parasitic drag of another crank driven device.

 

[gtrboyy]

Don;t think those diesel alternator/vacuum pump things handle the revs & old as hell now anyway.

 

[Alspos]

.

 

[Ute23q]

Ignition 12V -> Vacuum switch red
Vacuum switch brown -> to control relay brown
Fused 12V -> control relay red
Body ground -> control relay black

Third picture shows the factory control relay and pump. Most people I've seen selling the pumps don't include the control relay cos they obviously don't know how it all works together.

Hi. Ive got same problem with no vacuum so Ive bought the pump and the 2 lines with the part that goes into booster. Does the second line go back to the manifold also do i need anything else

 

[andrewed1]

Hi with the Vacuum switch you using how have you wired it up as it has 2 wires coming out ?? Ground or Positive connection

i too and upgrading my brakes and this is the last part any help appreciated

all power running via a relay just unsure of how to wire up the Switch ( using a volvo xc90 switch as pictured )

 

[Alspos]

Ignition 12V -> Vacuum switch red
Vacuum switch brown -> to control relay brown
Fused 12V -> control relay red
Body ground -> control relay black

You use the pump switch as exactly that, a switch to send 12V to the control relay. If you're using a regular relay to control the pump, terminal 86 and 85 is ground.

 

[Alspos]

Hi. Ive got same problem with no vacuum so Ive bought the pump and the 2 lines with the part that goes into booster. Does the second line go back to the manifold also do i need anything else

Yes. So there's two sources of vacuum. Sorry for the extremely late reply