re: wiper vacuum source
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Old Henry
Well-known member
Re: wiper vacuum source
An electric vacuum pump won't do a thing to help a vacuum motor that's not working right. It's not going to provide any more vacuum than the engine does. All the electric pump can do is provide vacuum when the engine isn't providing it on climbs and acceleration.
An electric vacuum pump won't do a thing to help a vacuum motor that's not working right. It's not going to provide any more vacuum than the engine does. All the electric pump can do is provide vacuum when the engine isn't providing it on climbs and acceleration.
jms50f5coe
Member
Re: wiper vacuum source
I have a aux. 6 volt vacuum pump on my truck. It has a switch that cycles it on when manifold vacuum is low. Helps alot. Appears to be original to the truck, maybe dealer option. 1950 F5coe
I have a aux. 6 volt vacuum pump on my truck. It has a switch that cycles it on when manifold vacuum is low. Helps alot. Appears to be original to the truck, maybe dealer option. 1950 F5coe
Alaska Jim
Well-known member
Re: wiper vacuum source
Old Henry, let us know how it works out, and whether you think it would work as a "stand alone" option, that is , with out the eng. vac. or a double action fuel pump. inquiring minds want to know.-------Jim
Old Henry, let us know how it works out, and whether you think it would work as a "stand alone" option, that is , with out the eng. vac. or a double action fuel pump. inquiring minds want to know.-------Jim
tubman
Well-known member
Re: wiper vacuum source
A quick "Google" search shows that there are quite a few options for vacuum operated switches that could be used to turn the pump on only when needed. I think I am going to forego my search for a vacuum reservoir for a while until we hear from Henry.
A quick "Google" search shows that there are quite a few options for vacuum operated switches that could be used to turn the pump on only when needed. I think I am going to forego my search for a vacuum reservoir for a while until we hear from Henry.
fordor41
Well-known member
Re: wiper vacuum source
that was the point of the vac. pump. A constant, reliable source of vacuum. But the vac motors do tend to dry out from sitting idle for periods of time.
carguybill
Senior Member
Re: wiper vacuum source
Vacuum pumps are used regularly to maintain vacuum to vacuum operated power brake boosters. they activate when the manifold vacuum drops like when the engine dies, for example. I use one on my '77 GMC motorhome. They are readily available at the "men's malls" aka junk yards. Problem is I suspect most, if not all, will be 12 volt.
Vacuum pumps are used regularly to maintain vacuum to vacuum operated power brake boosters. they activate when the manifold vacuum drops like when the engine dies, for example. I use one on my '77 GMC motorhome. They are readily available at the "men's malls" aka junk yards. Problem is I suspect most, if not all, will be 12 volt.
Old Henry
Well-known member
Re: wiper vacuum source
Bad news. Received notice today that my order for the 6 volt vacuum pump was canceled by the supplier. No other explanation given. And I was so excited to try it out. It seemed a very promising, cheap and easily installed solution to the sometimes inconsistent vacuum from the engine. I'm still passionate to try this out if I can find another source of a 6 volt pump. Any help would be appreciated.
Bad news. Received notice today that my order for the 6 volt vacuum pump was canceled by the supplier. No other explanation given. And I was so excited to try it out. It seemed a very promising, cheap and easily installed solution to the sometimes inconsistent vacuum from the engine. I'm still passionate to try this out if I can find another source of a 6 volt pump. Any help would be appreciated.
51 MERC-CT
Well-known member
Re: wiper vacuum source
If I still had vacuum wipers I would probably go the booster pump route but I have long since converted to electric wipers.
Perhaps a 12 volt pump powered by a stand alone 12 volt battery (like the little jump start booster pack)
If I still had vacuum wipers I would probably go the booster pump route but I have long since converted to electric wipers.
petehoovie
Well-known member
Re: wiper vacuum source
I hope it works. Looking forward to seeing the video Henry....
I hope it works. Looking forward to seeing the video Henry....
Merc Cruzer
Well-known member
Re: wiper vacuum source
This would work.
http://www.ebay.com/itm/1940s-1950s...ash=item27ffb99290:g:uNIAAOSwl8NVWfc4&vxp=mtr
This would work.
http://www.ebay.com/itm/1940s-1950s...ash=item27ffb99290:g:uNIAAOSwl8NVWfc4&vxp=mtr
tubman
Well-known member
Lawson Cox
Well-known member
Re: wiper vacuum source
"shore nuff." is.
"shore nuff." is.
Old Henry
Well-known member
Re: wiper vacuum source
Darn! It didn't work!
Got the 6 volt electric vacuum pump in from Hong Kong and excitedly hooked it up. It pumped away but never budged my wipers. I checked the amount of vacuum created and it was the same as my engine - 14-15 Hg. I guess there just wasn't enough volume.
Not a total waste of the $40.00 I paid to get the pump. I learned something that I always wondered about and wanted to know. Now I do. All education is worth something. Especially when it can be shared with others who get to learn without the "tuition" charge.
Darn! It didn't work! Got the 6 volt electric vacuum pump in from Hong Kong and excitedly hooked it up. It pumped away but never budged my wipers. I checked the amount of vacuum created and it was the same as my engine - 14-15 Hg. I guess there just wasn't enough volume.
Not a total waste of the $40.00 I paid to get the pump. I learned something that I always wondered about and wanted to know. Now I do. All education is worth something. Especially when it can be shared with others who get to learn without the "tuition" charge.
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flatheadmurre
Well-known member
Re: wiper vacuum source
What was the rated flow of the pump you got ?
What was the rated flow of the pump you got ?
Old Henry
Well-known member
Re: wiper vacuum source
13 L/min
I would have thought that if the volume wasn't high enough that it would move the wipers but slowly but it didn't even budge them. Maybe something else is wrong. The wipers work just fine on the engine vacuum.
13 L/min
I would have thought that if the volume wasn't high enough that it would move the wipers but slowly but it didn't even budge them. Maybe something else is wrong. The wipers work just fine on the engine vacuum.
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Marv
Well-known member
Re: wiper vacuum source
There is nothing wrong with your wipers Henry. Those units are worthless for what you are trying to do. There was a unit at the same site you gave us that may work. It was around $150 if i remember right. There is no way to get by cheap that i know of.
There is nothing wrong with your wipers Henry. Those units are worthless for what you are trying to do. There was a unit at the same site you gave us that may work. It was around $150 if i remember right. There is no way to get by cheap that i know of.
Old Henry
Well-known member
Re: wiper vacuum source
It may well be that this pump is just not sufficient to the task. But, with some more testing tonight I discovered a weakness in my wiper vacuum motor that is likely contributing to the pump's inability to operate it.
With the wiper switch turned off, I'm able to get 13-14 Hg of vacuum in the line to the wiper motor. But, it fades pretty fast when I shut the pump off - like back to 0 in 2-3 seconds.
When I turn on the pump with the wiper switch turned on, I can't get more than about 2-3 Hg of vacuum. So, the vacuum motor just doesn't seal tight enough for the pump to create enough vacuum to run it.
It may be that all vacuum wiper motors are not tight enough or it may be that the pump would actually do something for a wiper motor that seals tighter. My vacuum motor has not been rebuilt with all new parts. It has just been cleaned and lubricated to work fine for me.
If anyone wants to try it out on what they think is a tighter sealing vacuum motor let me know and I'll send it for you to try out. If it works, you can pay me for it. If not, you can send it back.
It may well be that this pump is just not sufficient to the task. But, with some more testing tonight I discovered a weakness in my wiper vacuum motor that is likely contributing to the pump's inability to operate it.
With the wiper switch turned off, I'm able to get 13-14 Hg of vacuum in the line to the wiper motor. But, it fades pretty fast when I shut the pump off - like back to 0 in 2-3 seconds.
When I turn on the pump with the wiper switch turned on, I can't get more than about 2-3 Hg of vacuum. So, the vacuum motor just doesn't seal tight enough for the pump to create enough vacuum to run it.
It may be that all vacuum wiper motors are not tight enough or it may be that the pump would actually do something for a wiper motor that seals tighter. My vacuum motor has not been rebuilt with all new parts. It has just been cleaned and lubricated to work fine for me.
If anyone wants to try it out on what they think is a tighter sealing vacuum motor let me know and I'll send it for you to try out. If it works, you can pay me for it. If not, you can send it back.
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