Vacuum assist pump hookup

W

wayne nesbitt

New member
Mar 15, 2000
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I am going to plumb the vacuum line tomorrow. My buddy that put his in has
the filter between the pump and booster. He says this is where they put them
on the cars. Gene site shows it between the pump and the 455.

Any words of wisdom here?
TIA
Wayne
 
Well sure just put the pressure on----- I had to go look at the notes I got
from Duane Edwards who is Mr. Vacuum pump. His notes said to put the
filter just as shown in the picture between the pump and the engine.. In
fact he implies that the straight end of the filter should go toward the
pump and the end with the right angle pipe out, goes toward the engine.....
That last part I have never considered but that is what his notes said...

I have taken several pumps off of the cars, but I must admit I do not
remember where the filter was... I am sure Duane and the drawing are correct.

wire
The power wire on the original wire harness to the pump is large. I have
not measured it but it is large.

gene

gene

>I am going to plumb the vacuum line tomorrow. My buddy that put his in has
>the filter between the pump and booster. He says this is where they put them
>on the cars. Gene site shows it between the pump and the 455.
>
>Any words of wisdom here?
>TIA
>Wayne
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/
 
>I am going to plumb the vacuum line tomorrow. My buddy that put his in has
>the filter between the pump and booster. He says this is where they put them
>on the cars. Gene site shows it between the pump and the 455.
>
>Any words of wisdom here?
>TIA
>Wayne

Wayne - you want to put the filter between the engine and the pump
just as Gene's site shows it. You want to protect the vacuum pump
from getting contaminants from the engine such as carbon particles
that could lodge underneath the reed valve in the pump. This would
probably only happen if your engine happens to backfire. Your
booster diaphram is already protected. The small plastic hose
connector going into the booster has a filter built into it.

Tell your buddy to change his. Your setup is different than the car.

Emery Stora
77 Kingsley
Santa Fe, NM
 
>I am going to plumb the vacuum line tomorrow. My buddy that put his in has
>the filter between the pump and booster. He says this is where they put them
>on the cars. Gene site shows it between the pump and the 455.
>
>Any words of wisdom here?
>TIA
>Wayne

Wayne - you want to put the filter between the engine and the pump
just as Gene's site shows it. You want to protect the vacuum pump
from getting contaminants from the engine such as carbon particles
that could lodge underneath the reed valve in the pump. This would
probably only happen if your engine happens to backfire. Your
booster diaphram is already protected. The small right angle plastic
hose connector going into the booster has a filter built into it.

Tell your buddy to change his. Your setup is different than the car.

As to the use of #10 wire, I put mine on quite some time before the
info was posted to Gene's site and I used #12 wire and it seems to
work just fine. You want heavy enough wire so as to not cause a
voltage drop since you want the pump to work quickly. I have the #12
main power lead going to the engine battery + stud terminal on the
firewall by the boost solenoid mount with its own in line fuse. The
other wire that goes to the Ign. terminal on the fuse block can be
lighter gauge as it only operates the internal solenoid in the pump
that allows the motor current to flow through the main power lead.

Emery Stora
77 Kingsley
Santa Fe, NM
 
>
>Emery
>
>I have been reading all of this about the filter. I got my vacuum
>pump from Leigh. There is no filter with it. Mine seems to be a little
>different. The instructions with it said to hook the line from the engine
>to the pump, then hook the brake booster to the other outlet on the
>pump. It sure seems to work well enough. What am I missing?
>
>Take Care
>Arch

Arch - it will work fine without the filter. The air flow is
normally from the pump to the engine but there is a potential risk
that contaminants from the engine (carbon deposits, grit) could get
to the pump. The pump is a diaphragm pump and if deposits get under
the diaphragm flapper is could cause leaks and faulty operation. The
filter is just an added insurance to prevent this possibility. You
can see a picture of it on Gene Fisher's site on the pictures of the
vacuum pump.

If you send me your address I'll put one in the mail for you.

Emery Stora
77 Kingsley
Santa Fe, NM
 
source numbers for filters

http://www.california.com/~eagle/addens.htm

gene

>Em I just bought a new pump but am unable to find a new filter. Where did
>you get yours?
>tom
>

>>>
>>>Emery
>>>
>>>I have been reading all of this about the filter. I got my vacuum
>>>pump from Leigh. There is no filter with it. Mine seems to be a little
>>>different. The instructions with it said to hook the line from the engine
>>>to the pump, then hook the brake booster to the other outlet on the
>>>pump. It sure seems to work well enough. What am I missing?
>>>
>>>Take Care
>>>Arch
>>
>>Arch - it will work fine without the filter. The air flow is
>>normally from the pump to the engine but there is a potential risk
>>that contaminants from the engine (carbon deposits, grit) could get
>>to the pump. The pump is a diaphragm pump and if deposits get under
>>the diaphragm flapper is could cause leaks and faulty operation. The
>>filter is just an added insurance to prevent this possibility. You
>>can see a picture of it on Gene Fisher's site on the pictures of the
>>vacuum pump.
>>
>>If you send me your address I'll put one in the mail for you.
>>
>>Emery Stora
>>77 Kingsley
>>Santa Fe, NM
>>
>>
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/
 
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