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Username Post: How can I test vacuum wiper motor?        (Topic#354676)
tkruger 
Poster
Posts: 25

Reg: 07-19-18
01-02-19 08:47 AM - Post#2756329    

I am in the process of restoring a 1941 Master Deluxe. The wiper motor looks shiny an newly replaced. I is not connected to the wiper transmission and the arms are off the car. Is there a way I can test this part without having to start the car? (it runs but is in pieces at this point).

I would go electric but plan this to be a good weather only car when done. The wipers are there in emergency and to pass inspection only.



 


Shepherd 
Frequent Contributor
Posts: 1852

Loc: Lake George, NY
Reg: 11-11-15
01-02-19 12:23 PM - Post#2756352    
    In response to tkruger

How about a long vacuum hose from a car parked next to it. Boy am I going to hear about this. Lol



 
Keith_Knox 
Moderator and "17th Year" Gold Supporting Member
Posts: 6220
Keith_Knox
Age: 78
Loc: Napa, Ca USA
Reg: 04-02-00
01-02-19 06:54 PM - Post#2756397    
    In response to Shepherd

I was thinking something similar. I have a wiper motor my son got off of ebay. I just used a hose off the manifold on my 48 and it worked. Haven't installed it yet tho.

29-41, 42-48, 49-54 Moderator
1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1946 Chevy 1/2 ton pickup, stock. Purchased 11/18/17.
2019 Ford Ranger Lariat Super Crew


 
tkruger 
Poster
Posts: 25

Reg: 07-19-18
01-03-19 06:47 AM - Post#2756448    
    In response to tkruger

Would attaching this to a shop vac work? Of course the vacuum would need to be decreased somehow. How much vacuum does one of these motors need?

Just an FYI these old vacuum motors are new to me. I am familiar with the more modern 12v ones.



 
Shepherd 
Frequent Contributor
Posts: 1852

Loc: Lake George, NY
Reg: 11-11-15
01-03-19 07:05 AM - Post#2756453    
    In response to tkruger

You would need about 16" of vacuum, but the shop vac may have too much volume, unless restricted in some way.



 
2blu52 
"18th Year" Silver Supporting Member
Posts: 19002
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
01-03-19 03:50 PM - Post#2756491    
    In response to Shepherd

A vacuum pump might do it

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
Shepherd 
Frequent Contributor
Posts: 1852

Loc: Lake George, NY
Reg: 11-11-15
01-03-19 04:50 PM - Post#2756497    
    In response to 2blu52

I thought of that too, but it produces to little volume without building up some reserve in a vacuum tank.



 
BearsFan315 
Poster
Posts: 96

Loc: Virginia
Reg: 12-12-12
01-12-19 07:09 PM - Post#2757225    
    In response to tkruger

I rebuilt a trico for my 1929 few months back. Here is what i did, I took my small house cordless vacuum, and then taped my plastic dollar tree turkey baster on to the end of the hose using vinyl tape (electrical tape). wanted to avoid any vacuum leaks. then the turkey baster end was a little to big for the vacuum connection, so wrapped a few turns of vinyl tape around the fitting and got a NICE SNUG fit. fired up the vacuum and NOTHING happened. short panic set in and thought the wiper was trash :/

then i thought how much vacuum is this vacuum actually pulling, so hooked it up to the Vacuum gauge, and it barely pulled 1 inch of Hg. so swapped out the cordless for the 5 gal shop vac. it pulls about 4 in of Hg. so connected it to the vacuum wiper motor. and away the wiper went. i was happy. let it run for a minute to make sure everything works correctly.

just for you guys, I shot a short video, make sure you turn down the SOUND, the Vacuum is LOUD !!
Vacuum Motor Mechanisms at Work
Vacuum Wiper Swinging Wiper Arm
videos are a little large, so may take a few minutes to initialize and run but they are cool, especially the one with the mechanisms

Link to ALL 1929 Vacuum Wiper Motor Pictures

AACA - VCCA - Stovebolt - ChevyTalk
Love the Antique Chevrolet's from 1928-1932
The Beauty, Simplicity, History, and the Stories they Tell


 
38TownSd 
Poster
Posts: 28

Age: 70
Loc: Bracebridge Ontario Canad...
Reg: 04-04-13
02-01-19 06:19 PM - Post#2758781    
    In response to BearsFan315

I use my central vac system. I take a small funnel that fits the tubing for the wiper motor. I hook up the motor, turn the central vac on with the plain metal pipe (no attachment) on the hose, put the funnel against the pipe and the vacuum will lock it on. I think it produced about 11".



 


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