I can answer this one. I too was confused when I saw the photo in the
salesman's book. Couldn't for the life of me figure out how it might
operate. I found one, and installed it, and it works great - the hardest
part was finding the nozzles and activation switch. I now have two more (I
just thought they were too cool, so started collecting them just in
case...of what, I'm still not sure). Anyway, there are two ports on the
bulbous portion to attach vacuum lines. The one on the top of the unit
attaches to the intake (or somewhere to draw a vacuum). This creates a
negative pressure within the bulbous portion, sucking water into the void
(there is some kinda spring loaded device inside that expands when under
vacuum, which in turn draws washer water into the bulb). The vacuum line
actually goes from the intake first to an inline switch (mechanical, not
electrical) between the intake and the top port. When you push the button
on this switch, it enables the vacuum to act on the bulbous portion,
creating the negative pressure and filling the bulb with water. When you
release the button, it releases the spring and you get discharge of its load
through the nozzles, and voila, you have clean windshield. So, if you
haven't figured out yet, the other port on the bulb portion is an exit port
for the water and goes to the washer nozzles. Really pretty cool! Mine is
working beautifully three years after installation.
I can't tell you how the other one works tho, sorry.
Rob
P.S. Let me know if my description confuses more than enlightens.
----- Original Message -----
From: Nelson, Jeff - DTC <jnelson@paducah.k12.ky.us>
To: <oletrucks@autox.team.net>
Sent: Wednesday, May 12, 1999 1:15 PM
Subject: [oletrucks] Windshield Washers
> I would like to install an original Trico windshield washer on my 53
> 3600. In the Salesman's Data Book (reprint) for 1949 there is a
> photograph of a washer which has a cylindrical object on the top of the
> jar lid. A drawing in the Accessories Installation Manual (reprint) for
> 1953 shows a plain jar lid with a single T connection, one end of the T
> going to a foot pump and the other going to the windshield spray nozzle.
> A couple of questions.
>
> 1. Were these units actually different or is it just a difference
> between a photo and a drawing?
> 2. If they were different (and the cylinder on top of the 49 might be
> the pump) how did the 49 unit operate? Did it use a foot pump also or
> did it use some other mechanism?
>
> Finally, I have a 1948-53 Trico Windshield Washer for Chevy Passenger
> cars that is complete. I'll trade it for a 53 Truck washer or possibly
> sell it. If interested, email me off the list.
>
> TIA
> Jeff Nelson
> 1953 3600 (in pieces all over the shop)
> Paducah, KY
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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