Power Steering Conversion Question

[Steelstacks]

Just starting to get back into working on the 67 again after a long hiatus. My first project I want to tackle is a power steering conversion kit. I learned that since mine is a 67 it has the fuel pump with the pump for the vacuum wipers attached to it. This seems like it would be in the way when I go to attach the power steering pump.

At the very least, the metal hose will surely be in the way. Has anyone had to deal with this and what is the work around? Would I have to just get a new fuel pump without the pump for the vacuum wipers and then upgrade to electric wipers? Any advice is appreciated. Thank you.


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[Eoth]

Hard to find anyone that wont encourage you to go with electric wipers. Those duel fuel/vacuum work better better than using manifold vacuum, but its an option that should be available without any additional cost... Then all you need is a standard mechanical pump.

 

[jamesroney]

It is possible to make a bracket that will locate the power steering pump high enough to clear the vacuum pump.

I saw one on a 68 last month. It was pretty clean, and worked just fine. The pivot was similar to the offset bracket on the 351W. The front bracket was a cut and weld.

I like vacuum wipers.

 

[Steelstacks]

Ok so I have a replacement pump that doesn’t have vacuum wiper attachments that the PO included with the truck parts in the sale. So I see there are 4 hoses. I’m assume the bottom 2 hoses are for the fuel pump. So are the top 2 hoses for the wipers then? The top metal one goes to the manifold and I haven’t gotten a chance to see where the top rubber rose runs to. So what do I do with the top 2 hoses once I install the new pump?


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[Eoth]

Actually I think that the top part is the fuel pump and the bottom is the vacuum pump. One hose should lead to your carburetor. Obviously if you follow it back you will know which end is the fuel. Your vacuum will lead to a port at the back of the manifold.
So your fuel line from the tank will go into the fuel pump and then to the carb. Not sure where all your vacuum lines go but basically speaking, just take the line that goes into the vacuum pump and plug it into the manifold.

 

[thegreatjustino]

Actually I think that the top part is the fuel pump and the bottom is the vacuum pump. One hose should lead to your carburetor. Obviously if you follow it back you will know which end is the fuel. Your vacuum will lead to a port at the back of the manifold.
So your fuel line from the tank will go into the fuel pump and then to the carb. Not sure where all your vacuum lines go but basically speaking, just take the line that goes into the vacuum pump and plug it into the manifold.

Incorrect. The bottom ports on the pump are for fuel. The top two are for vacuum. Only one is used for the wipers. Some pumps are actually marked "wipers" so you know which port to use. On my '67 V8 the top vacuum port that doesn't go to the wipers is tied into a vacuum tee at the back of the intake manifold. On my '68 6-cyl, the vacuum port that doesn't go to the wipers is simply capped off.

 

[Eoth]

I stand corrected..... (My last fuel/vacuum pump was on my 1951 Buick Super...)

 

[jamesroney]

Incorrect. The bottom ports on the pump are for fuel. The top two are for vacuum. Only one is used for the wipers. Some pumps are actually marked "wipers" so you know which port to use. On my '67 V8 the top vacuum port that doesn't go to the wipers is tied into a vacuum tee at the back of the intake manifold. On my '68 6-cyl, the vacuum port that doesn't go to the wipers is simply capped off.

A little more:

The vacuum generation in a Bronco uses manifold vacuum as the primary source, and the vacuum pump acts as a "booster" when the engine vacuum is low. Remember that the airflow starts at the little filter in the wiper motor. When you open the valve on the wiper, air is allowed to enter the vacuum motor, then goes down the vacuum hose, thru the fuel pump, and then into the intake manifold. When the wipers are running, you basically create a vacuum "leak" at the manifold. (and yes, that air bypasses the engine air filter.)

If you look at the plumbing...you have a tube running from the manifold to the pump, and a hose running from the pump to the wipers. If you remove the vacuum pump, you can just connect the two at the pump...or you can re-route the rubber hose directly to the manifold. In either case, the wipers will not work at WOT. So just don't drive uphill in the rain.