Tubes on frame

[JohnC]

Hi All,

While looking under the hood today getting ready to do the exhaust, I noticed strapped to the frame on the passenger side, 3 tubes, about 1/4" to 3/8" wide, open ended on the side near the firewall. What are these for. I don't see it in the manual or online.

Thanks

[Barry Wolk]

Vacuum lines for the washer and wiper circuits.

[JohnC]

Thanks Barry. Anoher question on the wiper circuit....is it a hose or a tube from the vacuum pump to the washer bottle?

[Barry Wolk]

All of the vacuum and sprayer lines transfer to steel pipe in the area of the exhaust manifold. The heat would bake rubber hose. If I recall correctly one tube is for vacuum pump vacuum to the wiper motor and through the firewall into the interior. The second is the vacuum signal from the spray coordinator and the third is the pressurized sprayer hose off the washer bottle. If you're replacing hoses make sure they have raised ribs, denoting that they are vacuum, not pressure hoses. People often use heater hose for the big lines, but they will collapse when hot.

[Barry Wolk]

Maybe I misunderstood your question. There is a hard pipe out of the vacuum pump. That travels in hose to a T that runs to the washer bottle and then in hose to the pipe on the frame.

[JohnC]

Thanks again...the info here is amazing

[Barry Wolk]

Vacuum pump.

Vacuumpump56.jpg

[Barry Wolk]

Here's a color-coded diagram I did to better help this that have trouble following B&W drawings.

[JohnC]

While working on the car today, using this diagram, I saw the hose from the manifold to the treadle vac was there but someone plugged the check valve for the hose that goes to the vacuum storage tank. I have a feeling a lot of vac lines are missing. This drawing will help sort this out.

Thanks

[Barry Wolk]

The vacuum storage tank in the frame may have a leak. The leaks are usually in the bottom of tank where water collects. that valve and system is important, but most don't work because the rubber on the stopper is too hard. I'm thinking about trying a handle-dip as an exterior coating.