Windshield washer system. What do I need for my T6B?

[Hugo Karasawa]

I think you need three check valves. One each for each jet and one before the tank.
The red arrows show where these valves are located, in parts 9 and 13.

[Doug McDonnell]

13 is not a check valve. It is a T piece

[Mike Wilson]

I had posted a lengthy reponse based upon data from the B, B Supplement and C parts manuals. For some reason, the post didn't get loaded. At any rate, changes to the windshield wiper system occurred after July of '62. Post July, pick up tube through the cap and the double jet squirters with chrome caps.

Mike

[Hugo Karasawa]

Thought it is a check valve, in the parts catalog part 13 is described as a valve and has a different p/n as part 8 which is described as a T piece.
The filter pick up has a check valve.

[Mike Wilson]

B parts manual: #8: 644.628.745.00; a tee
#9: 644.628.746.00; tee with valve

B Supplement: #8: 644.628.745.01; a tee, two needed
#9: 644.628.741.02; squirter with valve, two needed

C manual: #8: 644.628.745.01; a tee, two needed
#13: 644.628.746.00; a tee noted for right hand steering only.
I suspect #13 had a check valve because no valves are noted for the squirters.

Mike

[Greg Bryan]

If you think about it, if there wasn't a third check valve in the line between the right hand squirter in the picture above and the bottle, the fluid would just push back into the reservoir. The check valves up by the squirters keep the fluid from draining back so it will squirt on the first push.

[Mike Wilson]

Seems like there was a thread some time back that explained how the system works but your explanation sounds right. There has to be a valve to prevent the water from flowing back.

[Doug McDonnell]

posting.php?mode=quote&f=1&p=292215 The system is a closed system.Check valves only needed where the system opens which is the nozzles. #13 needed for RHD because they used the bag like T5 cars not the reservoir used in LHD T6 cars. Also the diagram Hugo posted includes some things for the optional electric washer pump which I have never seen.

[Eric McKinley]

I recently did this job on my 356C.
It sounds harder to get right than it really is.
The check valves are at the nozzles, you can't put these in the wrong way.
In relation to the part 8 and 13, these have arrows of travel, blow into them, you will see what I mean.
Number 19 is the part that is probably already on the top of your washer bottle, if that is the type you have.
2 metres of hose is enough as Doug has said, don't worry about exact measurements for the hose, as long as it isn't under tension because you cut it too short.
Connect the foot pump and push, does water jet onto the screen, yes, your done, no, you've probably put one of the T valves in the wrong direction.

[Mike Smith]

Doug States -

Also the diagram Hugo posted includes some things for the optional electric washer pump which I have never seen.

The Wiper Switch was also special for the Electric Pump System
Besides having the normal features of - On/Off plus a Rheostat it was also possible to pull the switch out a little further to engage contacts within it that would provide the supply to the Electric Pump.
The pump would then operated for as long as you held the knob pulled out.

These were available for both 6v and 12v

Rare as Rocking Horse Muck but the numbers are -
6v - 644 613 513 00
12v - 644613 514 00

[Vincent Chiaro]

I just replaced the hoses on my 1960 roadster and this thread was helpful about the one-way check valve! Thank you.

In case someone finds this in the future (maybe there is another thread with more details) on my car (T5B Roadster) there is only a check valve in the "T" that is down near the foot pump. So it goes from in front the reservoir in the frunk, straight across the top of the T feeds to the hose leading to the drivers side windshield washer sprayer and the bottom of the T goes to the foot pump. So as you pump, it creates suction across the top of the T.

Just before the drivers side sprayer nozzle there is another T which leads to the passenger side nozzle and a very short distance to the drivers nozzle. When I blew (yes with my mouth) through this T it does not appear to have any check valve.

I am having a little bit of trouble with the passenger nozzle so it's possible that I may have hooked that part up wrong although I didn't think it would matter (I did the bottom of the T to the drivers nozzle.) The passenger nozzle on the outside of the car also appears to be missing it's small brass washer so that could be why I'm only getting a slight trickle.

The drivers side shoots a stream 5 feet into the air though! After a little aiming it's hitting the glass now.

I'm truly amazed whenever stuff like this still works after ~63 years.

That said, I'll probably keep the system dry to avoid any chance of leaks but I'm happy to have it functional in case I ever need to fill it up on a road trip.

[Mike Wilson]

Congrats on the project, Vince.

Mike

[Vincent Chiaro]

Here's a diagram of the T5B system. A picture is worth a thousand words. Part 7 in the diagram is the check valve.

[Brock Tuffli]

Can you take a picture of where the tubing goes through the firewall or dashboard? I’m looking to make sure i have the right holes in the right places as i work on my1960 roadster.

[Vincent Chiaro]

Brock - sure! Here you go.

As you can see, the hole is to the left of the parking brake rod and goes "up" into the frunk. That rubber grommet I believe should be pushed into the hole but I just have everything loosely in place while I'm fiddling with it.